Changelog

Cargo 1.54 (2021-07-29)

4369396c...HEAD

Added

Fetching from a git repository (such as the crates.io index) now displays the network transfer rate. #9395

Changed

Fixed

Fixed package.exclude in Cargo.toml using inverted exclusions (!somefile) when not in a git repository or when vendoring a dependency. #9186
Dep-info files now adjust build script rerun-if-changed paths to be absolute paths. #9421

Nightly only

Added report subcommand, and changed cargo describe-future-incompatibilitie to cargo report future-incompatibilities. #9438

Cargo 1.53 (2021-06-17)

90691f2b...rust-1.53.0

Added

Changed

🔥 Cargo now supports git repositories where the default HEAD branch is not "master". This also includes a switch to the version 3 Cargo.lock format which can handle default branches correctly. #9133 #9397 #9384 #9392
🔥 macOS targets now default to unpacked split-debuginfo. #9298
❗ The authors field is no longer included in Cargo.toml for new projects. #9282
cargo update may now work with the --offline flag. #9279
cargo doc will now erase the doc directory when switching between different toolchain versions. There are shared, unversioned files (such as the search index) that can become broken when using different versions. #8640 #9404
Improved error messages when path dependency/workspace member is missing. #9368

Fixed

Fixed cargo doc detecting if the documentation needs to be rebuilt when changing some settings such as features. #9419
cargo doc now deletes the output directory for the package before running rustdoc to clear out any stale files. #9419
Fixed the -C metadata value to always include all information for all builds. Previously, in some situations, the hash only included the package name and version. This fixes some issues, such as incremental builds with split-debuginfo on macOS corrupting the incremental cache in some cases. #9418
Fixed man pages not working on Windows if man is in PATH. #9378
The rustc cache is now aware of RUSTC_WRAPPER and RUSTC_WORKSPACE_WRAPPER. #9348
Track the CARGO environment variable in the rebuild fingerprint if the code uses env!("CARGO"). #9363

Nightly only

Fixed config includes not working. #9299
Emit note when --future-incompat-report had nothing to report. #9263
Error messages for nightly features flags (like -Z and cargo-features) now provides more information. #9290
Added the ability to set the target for an individual package in Cargo.toml. docs #9030
Fixed build-std updating the index on every build. #9393
-Z help now displays all the -Z options. #9369
Added -Zallow-features to specify which nightly features are allowed to be used. #9283
Added cargo config subcommand. #9302

Cargo 1.52 (2021-05-06)

34170fcd...rust-1.52.0

Added

Added the "manifest_path" field to JSON messages for a package. #9022 #9247

Changed

Build scripts are now forbidden from setting RUSTC_BOOTSTRAP on stable. #9181 #9385
crates.io now supports SPDX 3.11 licenses. #9209
An error is now reported if CARGO_TARGET_DIR is an empty string. #8939
Doc tests now pass the --message-format flag into the test so that the "short" format can now be used for doc tests. #9128
cargo test now prints a clearer indicator of which target is currently running. #9195
The CARGO_TARGET_<TRIPLE> environment variable will now issue a warning if it is using lowercase letters. #9169

Fixed

Fixed publication of packages with metadata and resolver fields in Cargo.toml. #9300 #9304
Fixed logic for determining prefer-dynamic for a dylib which differed in a workspace vs a single package. #9252
Fixed an issue where exclusive target-specific dependencies that overlapped across dependency kinds (like regular and build-dependencies) would incorrectly include the dependencies in both. #9255
Fixed panic with certain styles of Package IDs when passed to the -p flag. #9188
When running cargo with output not going to a TTY, and with the progress bar and color force-enabled, the output will now correctly clear the progress line. #9231
Error instead of panic when JSON may contain non-utf8 paths. #9226
Fixed a hang that can happen on broken stderr. #9201
Fixed thin-local LTO not being disabled correctly when lto=off is set. #9182

Nightly only

The strip profile option now supports true and false values. #9153
cargo fix --edition now displays a report when switching to 2021 if the new resolver changes features. #9268
Added [patch] table support in .cargo/config files. #9204
Added cargo describe-future-incompatibilities for generating a report on dependencies that contain future-incompatible warnings. #8825
Added easier support for testing the 2021 edition. #9184
Switch the default resolver to "2" in the 2021 edition. #9184
cargo fix --edition now supports 2021. #9184
Added --print flag to cargo rustc to pass along to rustc to display information from rustc. #9002
Added -Zdoctest-in-workspace for changing the directory where doctests are run versus where they are compiled. #9105
Added support for an [env] section in .cargo/config.toml to set environment variables when running cargo. #9175
Added a schema field and features2 field to the index. #9161
Changes to JSON spec targets will now trigger a rebuild. #9223

Cargo 1.51 (2021-03-25)

75d5d8cf...rust-1.51.0

Added

🔥 Added the split-debuginfo profile option. docs #9112
Added the path field to cargo metadata for the package dependencies list to show the path for "path" dependencies. #8994
🔥 Added a new feature resolver, and new CLI feature flag behavior. See the new features and resolver documentation for the resolver = "2" option. See the CLI and resolver 2 CLI options for the new CLI behavior. And, finally, see RFC 2957 for a detailed look at what has changed. #8997

Changed

cargo install --locked now emits a warning if Cargo.lock is not found. #9108
Unknown or ambiguous package IDs passed on the command-line now display suggestions for the correct package ID. #9095
Slightly optimize cargo vendor #8937 #9131 #9132

Fixed

Fixed environment variables and cfg settings emitted by a build script that are set for cargo test and cargo run when the build script runs multiple times during the same build session. #9122
Fixed a panic with cargo doc and the new feature resolver. This also introduces some heuristics to try to avoid path collisions with rustdoc by only documenting one variant of a package if there are multiple (such as multiple versions, or the same package shared for host and target platforms). #9077
Fixed a bug in Cargo's cyclic dep graph detection that caused a stack overflow. #9075
Fixed build script links environment variables (DEP_*) not showing up for testing packages in some cases. #9065
Fixed features being selected in a nondeterministic way for a specific scenario when building an entire workspace with all targets with a proc-macro in the workspace with resolver="2". #9059
Fixed to use http.proxy setting in ~/.gitconfig. #8986
Fixed --feature pkg/feat for V1 resolver for non-member. #9275 #9277
Fixed panic in cargo doc when there are colliding output filenames in a workspace. #9276 #9277
Fixed cargo install from exiting with success if one of several packages did not install successfully. #9185 #9196
Fix panic with doc collision orphan. #9142 #9196

Nightly only

Removed the publish-lockfile unstable feature, it was stabilized without the need for an explicit flag 1.5 years ago. #9092
Added better diagnostics, help messages, and documentation for nightly features (such as those passed with the -Z flag, or specified with cargo-features in Cargo.toml). #9092
Added support for Rust edition 2021. #8922
Added support for the rust-version field in project metadata. #8037
Added a schema field to the index. #9161 #9196

Cargo 1.50 (2021-02-11)

8662ab42...rust-1.50.0

Added

Added the doc field to cargo metadata, which indicates if a target is documented. #8869
Added RUSTC_WORKSPACE_WRAPPER, an alternate RUSTC wrapper that only runs for the local workspace packages, and caches its artifacts independently of non-wrapped builds. #8976
Added --workspace to cargo update to update only the workspace members, and not their dependencies. This is particularly useful if you update the version in Cargo.toml and want to update Cargo.lock without running any other commands. #8725

Changed

.crate files uploaded to a registry are now built with reproducible settings, so that the same .crate file created on different machines should be identical. #8864
Git dependencies that specify more than one of branch, tag, or rev are now rejected. #8984
The rerun-if-changed build script directive can now point to a directory, in which case Cargo will check if any file in that directory changes. #8973
If Cargo cannot determine the username or email address, cargo new will no longer fail, and instead create an empty authors list. #8912
The progress bar width has been reduced to provide more room to display the crates currently being built. #8892
cargo new will now support includeIf directives in .gitconfig to match the correct directory when determining the username and email address. #8886

Fixed

Fixed cargo metadata and cargo tree to only download packages for the requested target. #8987
Updated libgit2, which brings in many fixes, particularly fixing a zlib error that occasionally appeared on 32-bit systems. #8998
Fixed stack overflow with a circular dev-dependency that uses the links field. #8969
Fixed cargo publish failing on some filesystems, particularly 9p on WSL2. #8950

Nightly only

Allow resolver="1" to specify the original feature resolution behavior. #8857
Added -Z extra-link-arg which adds the cargo:rustc-link-arg-bins and cargo:rustc-link-arg build script options. docs #8441
Implemented external credential process support, and added cargo logout. (RFC 2730) (docs) #8934
Fix panic with -Zbuild-std and no roots. #8942
Set docs.rs as the default extern-map for crates.io #8877

Cargo 1.49 (2020-12-31)

75615f8e...rust-1.49.0

Added

Added homepage and documentation fields to cargo metadata. #8744
Added the CARGO_PRIMARY_PACKAGE environment variable which is set when running rustc if the package is one of the "root" packages selected on the command line. #8758
Added support for Unix-style glob patterns for package and target selection flags on the command-line (such as -p 'serde*' or --test '*'). #8752

Changed

Computed LTO flags are now included in the filename metadata hash so that changes in LTO settings will independently cache build artifacts instead of overwriting previous ones. This prevents rebuilds in some situations such as switching between cargo build and cargo test in some circumstances. #8755
cargo tree now displays (proc-macro) next to proc-macro packages. #8765
Added a warning that the allowed characters for a feature name have been restricted to letters, digits, _, -, and + to accommodate future syntax changes. This is still a superset of the allowed syntax on crates.io, which requires ASCII. This is intended to be changed to an error in the future. #8814
-p without a value will now print a list of workspace package names. #8808
Add period to allowed feature name characters. #8932 #8943

Fixed

Fixed building a library with both "dylib" and "rlib" crate types with LTO enabled. #8754
Fixed paths in Cargo's dep-info files. #8819
Fixed inconsistent source IDs in cargo metadata for git dependencies that explicitly specify branch="master". #8824
Fixed re-extracting dependencies which contained a .cargo-ok file. #8835

Nightly only

Fixed a panic with cargo doc -Zfeatures=itarget in some situations. #8777
New implementation for namespaced features, using the syntax dep:serde. docs #8799
Added support for "weak" dependency features, using the syntax dep_name?/feat_name, which will enable a feature for a dependency without also enabling the dependency. #8818
Fixed the new feature resolver downloading extra dependencies that weren't strictly necessary. #8823

Cargo 1.48 (2020-11-19)

51b66125...rust-1.48.0

Added

Added term.progress configuration option to control when and how the progress bar is displayed. docs #8165
Added --message-format plain option to cargo locate-project to display the project location without JSON to make it easier to use in a script. #8707
Added --workspace option to cargo locate-project to display the path to the workspace manifest. #8712
A new contributor guide has been added for contributing to Cargo itself. This is published at https://rust-lang.github.io/cargo/contrib/. #8715
Zsh --target completion will now complete with the built-in rustc targets. #8740

Changed

Fixed

Fixed cargo new creating a fossil repository to properly ignore the target directory. #8671
Don't show warnings about the workspace in the current directory when using cargo install of a remote package. #8681
Automatically reinitialize the index when an "Object not found" error is encountered in the git repository. #8735
Updated libgit2, which brings in several fixes for git repository handling. #8778 #8780

Nightly only

Fixed cargo install so that it will ignore the [unstable] table in local config files. #8656
Fixed nondeterministic behavior of the new feature resolver. #8701
Fixed running cargo test on a proc-macro with the new feature resolver under a specific combination of circumstances. #8742

Cargo 1.47 (2020-10-08)

4f74d9b2...rust-1.47.0

Added

cargo doc will now include the package's version in the left sidebar. #8509
Added the test field to cargo metadata targets. #8478
Cargo's man pages are now displayed via the cargo help command (such as cargo help build). #8456 #8577
Added new documentation chapters on how dependency resolution works and SemVer compatibility, along with suggestions on how to version your project and work with dependencies. #8609

Changed

The comments added to .gitignore when it is modified have been tweaked to add some spacing. #8476
cargo metadata output should now be sorted to be deterministic. #8489
By default, build scripts and proc-macros are now built with opt-level=0 and the default codegen units, even in release mode. #8500
workspace.default-members is now filtered by workspace.exclude. #8485
workspace.members globs now ignore non-directory paths. #8511
git zlib errors now trigger a retry. #8520
"http" class git errors now trigger a retry. #8553
git dependencies now override the core.autocrlf git configuration value to ensure they behave consistently across platforms, particularly when vendoring git dependencies on Windows. #8523
If Cargo.lock needs to be updated, then it will be automatically transitioned to the new V2 format. This format removes the [metadata] table, and should be easier to merge changes in source control systems. This format was introduced in 1.38, and made the default for new projects in 1.41. #8554
Added preparation for support of git repositories with a non-"master" default branch. Actual support will arrive in a future version. This introduces some warnings:
- Warn if a git dependency does not specify a branch, and the default branch on the repository is not "master". In the future, Cargo will fetch the default branch. In this scenario, the branch should be explicitly specified.
- Warn if a workspace has multiple dependencies to the same git repository, one without a branch and one with branch="master". Dependencies should all use one form or the other. #8522
Warnings are now issued if a required-features entry lists a feature that does not exist. #7950
Built-in aliases are now included in cargo --list. #8542
cargo install with a specific version that has been yanked will now display an error message that it has been yanked, instead of "could not find". #8565
cargo publish with a package that has the publish field set to a single registry, and no --registry flag has been given, will now publish to that registry instead of generating an error. #8571

Fixed

Fixed issue where if a project directory was moved, and one of the build scripts did not use the rerun-if-changed directive, then that build script was being rebuilt when it shouldn't. #8497
Console colors should now work on Windows 7 and 8. #8540
The CARGO_TARGET_{triplet}_RUNNER environment variable will now correctly override the config file instead of trying to merge the commands. #8629
Fixed LTO with doctests. #8657 #8658

Nightly only

Added support for -Z terminal-width which tells rustc the width of the terminal so that it can format diagnostics better. docs #8427
Added ability to configure -Z unstable flags in config files via the [unstable] table. docs #8393
Added -Z build-std-features flag to set features for the standard library. docs #8490

Cargo 1.46 (2020-08-27)

9fcb8c1d...rust-1.46.0

Added

The dl key in config.json of a registry index now supports the replacement markers {prefix} and {lowerprefix} to allow spreading crates across directories similar to how the index itself is structured. docs #8267
Added new environment variables that are set during compilation:
- CARGO_CRATE_NAME: The name of the crate being built.
- CARGO_BIN_NAME: The name of the executable binary (if this is a binary crate).
- CARGO_PKG_LICENSE: The license field from the manifest.
- CARGO_PKG_LICENSE_FILE: The license-file field from the manifest. #8270 #8325 #8387
If the value for readme is not specified in Cargo.toml, it is now automatically inferred from the existence of a file named README, README.md, or README.txt. This can be suppressed by setting readme = false. #8277
cargo install now supports the --index flag to install directly from an index. #8344
Added the metadata table to the workspace definition in Cargo.toml. This can be used for arbitrary data similar to the package.metadata table. #8323
Added the --target-dir flag to cargo install to set the target directory. #8391
Changes to environment variables used by the env! or option_env! macros are now automatically detected to trigger a rebuild. #8421
The target directory now includes the CACHEDIR.TAG file which is used by some tools to exclude the directory from backups. #8378
Added docs about rustup's +toolchain syntax. #8455

Changed

A warning is now displayed if a git dependency includes a # fragment in the URL. This was potentially confusing because Cargo itself displays git URLs with this syntax, but it does not have any meaning outside of the Cargo.lock file, and would not work properly. #8297
Various optimizations and fixes for bitcode embedding and LTO. #8349
Reduced the amount of data fetched for git dependencies. If Cargo knows the branch or tag to fetch, it will now only fetch that branch or tag instead of all branches and tags. #8363
Enhanced git fetch error messages. #8409
.crate files are now generated with GNU tar format instead of UStar, which supports longer file names. #8453

Fixed

Fixed a rare situation where an update to Cargo.lock failed once, but then subsequent runs allowed it proceed. #8274
Removed assertion that Windows dylibs must have a .dll extension. Some custom JSON spec targets may change the extension. #8310
Updated libgit2, which brings in a fix for zlib errors for some remote git servers like googlesource.com. #8320
Fixed the GitHub fast-path check for up-to-date git dependencies on non-master branches. #8363
Fixed issue when enabling a feature with pkg/feature syntax, and pkg is an optional dependency, but also a dev-dependency, and the dev-dependency appears before the optional normal dependency in the registry summary, then the optional dependency would not get activated. #8395
Fixed clean -p deleting the build directory if there is a test named build. #8398
Fixed indentation of multi-line Cargo error messages. #8409
Fixed issue where the automatic inclusion of the --document-private-items flag for rustdoc would override any flags passed to the cargo rustdoc command. #8449
Cargo will now include a version in the hash of the fingerprint directories to support backwards-incompatible changes to the fingerprint structure. #8473 #8488

Nightly only

Added -Zrustdoc-map feature which provides external mappings for rustdoc (such as https://docs.rs/ links). docs #8287
Fixed feature calculation when a proc-macro is declared in Cargo.toml with an underscore (like proc_macro = true). #8319
Added support for setting -Clinker with -Zdoctest-xcompile. #8359
Fixed setting the strip profile field in config files. #8454

Cargo 1.45 (2020-07-16)

ebda5065e...rust-1.45.0

Added

Changed

Changed official documentation to recommend .cargo/config.toml filenames (with the .toml extension). .toml extension support was added in 1.39. #8121
The registry.index config value is no longer allowed (it has been deprecated for 4 years). #7973
An error is generated if both --index and --registry are passed (previously --index was silently ignored). #7973
The registry.token config value is no longer used with the --index flag. This is intended to avoid potentially leaking the crates.io token to another registry. #7973
Added a warning if registry.token is used with source replacement. It is intended this will be an error in future versions. #7973
Windows GNU targets now copy .dll.a import library files for DLL crate types to the output directory. #8141
Dylibs for all dependencies are now unconditionally copied to the output directory. Some obscure scenarios can cause an old dylib to be referenced between builds, and this ensures that all the latest copies are used. #8139
package.exclude can now match directory names. If a directory is specified, the entire directory will be excluded, and Cargo will not attempt to inspect it further. Previously Cargo would try to check every file in the directory which could cause problems if the directory contained unreadable files. #8095
When packaging with cargo publish or cargo package, Cargo can use git to guide its decision on which files to include. Previously this git-based logic required a Cargo.toml file to exist at the root of the repository. This is no longer required, so Cargo will now use git-based guidance even if there is not a Cargo.toml in the root of the repository. #8095
While unpacking a crate on Windows, if it fails to write a file because the file is a reserved Windows filename (like "aux.rs"), Cargo will display an extra message to explain why it failed. #8136
Failures to set mtime on files are now ignored. Some filesystems did not support this. #8185
Certain classes of git errors will now recommend enabling net.git-fetch-with-cli. #8166
When doing an LTO build, Cargo will now instruct rustc not to perform codegen when possible. This may result in a faster build and use less disk space. Additionally, for non-LTO builds, Cargo will instruct rustc to not embed LLVM bitcode in libraries, which should decrease their size. #8192 #8226 #8254
The implementation for cargo clean -p has been rewritten so that it can more accurately remove the files for a specific package. #8210
The way Cargo computes the outputs from a build has been rewritten to be more complete and accurate. Newly tracked files will be displayed in JSON messages, and may be uplifted to the output directory in some cases. Some of the changes from this are:
- .exp export files on Windows MSVC dynamic libraries are now tracked.
- Proc-macros on Windows track import/export files.
- All targets (like tests, etc.) that generate separate debug files (pdb/dSYM) are tracked.
- Added .map files for wasm32-unknown-emscripten.
- macOS dSYM directories are tracked for all dynamic libraries (dylib/cdylib/proc-macro) and for build scripts.
There are a variety of other changes as a consequence of this:
- Binary examples on Windows MSVC with a hyphen will now show up twice in the examples directory (foo_bar.exe and foo-bar.exe). Previously Cargo just renamed the file instead of hard-linking it.
- Example libraries now follow the same rules for hyphen/underscore translation as normal libs (they will now use underscores).
#8210
Cargo attempts to scrub any secrets from the debug log for HTTP debugging. #8222
Context has been added to many of Cargo's filesystem operations, so that error messages now provide more information, such as the path that caused the problem. #8232
Several commands now ignore the error if stdout or stderr is closed while it is running. For example cargo install --list | grep -q cargo-fuzz would previously sometimes panic because grep -q may close stdout before the command finishes. Regular builds continue to fail if stdout or stderr is closed, matching the behavior of many other build systems. #8236
If cargo install is given an exact version, like --version=1.2.3, it will now avoid updating the index if that version is already installed, and exit quickly indicating it is already installed. #8022
Changes to the [patch] section will now attempt to automatically update Cargo.lock to the new version. It should now also provide better error messages for the rare cases where it is unable to automatically update. #8248

Fixed

Fixed copying Windows .pdb files to the output directory when the filename contained dashes. #8123
Fixed error where Cargo would fail when scanning if a package is inside a git repository when any of its ancestor paths is a symlink. #8186
Fixed cargo update with an unused [patch] so that it does not get stuck and refuse to update. #8243
Fixed a situation where Cargo would hang if stderr is closed, and the compiler generated a large number of messages. #8247
Fixed backtraces on macOS not showing filenames or line numbers. As a consequence of this, binary executables on apple targets do not include a hash in the filename in Cargo's cache. This means Cargo can only track one copy, so if you switch features or rustc versions, Cargo will need to rebuild the executable. #8329 #8335
Fixed fingerprinting when using lld on Windows with a dylib. Cargo was erroneously thinking the dylib was never fresh. #8290 #8335

Nightly only

Fixed passing the full path for --target to rustdoc when using JSON spec targets. #8094
-Cembed-bitcode=no renamed to -Cbitcode-in-rlib=no #8134
Added new resolver field to Cargo.toml to opt-in to the new feature resolver. #8129
-Zbuild-std no longer treats std dependencies as "local". This means that it won't use incremental compilation for those dependencies, removes them from dep-info files, and caps lints at "allow". #8177
Added -Zmultitarget which allows multiple --target flags to build the same thing for multiple targets at once. docs #8167
Added strip option to the profile to remove symbols and debug information. docs #8246
Fixed panic with cargo tree --target=all -Zfeatures=all. #8269

Cargo 1.44 (2020-06-04)

bda50510...rust-1.44.0

Added

🔥 Added the cargo tree command. docs #8062
Added warnings if a package has Windows-restricted filenames (like nul, con, aux, prn, etc.). #7959
Added a "build-finished" JSON message when compilation is complete so that tools can detect when they can stop listening for JSON messages with commands like cargo run or cargo test. #8069

Changed

Valid package names are now restricted to Unicode XID identifiers. This is mostly the same as before, except package names cannot start with a number or -. #7959
cargo new and init will warn or reject additional package names (reserved Windows names, reserved Cargo directories, non-ASCII names, conflicting std names like core, etc.). #7959
Tests are no longer hard-linked into the output directory (target/debug/). This ensures tools will have access to debug symbols and execute tests in the same way as Cargo. Tools should use JSON messages to discover the path to the executable. #7965
Updating git submodules now displays an "Updating" message for each submodule. #7989
File modification times are now preserved when extracting a .crate file. This reverses the change made in 1.40 where the mtime was not preserved. #7935
Build script warnings are now displayed separately when the build script fails. #8017
Removed the git-checkout subcommand. #8040
The progress bar is now enabled for all unix platforms. Previously it was only Linux, macOS, and FreeBSD. #8054
Artifacts generated by pre-release versions of rustc now share the same filenames. This means that changing nightly versions will not leave stale files in the build directory. #8073
Invalid package names are rejected when using renamed dependencies. #8090
Added a certain class of HTTP2 errors as "spurious" that will get retried. #8102
Allow cargo package --list to succeed, even if there are other validation errors (such as Cargo.lock generation problem, or missing dependencies). #8175 #8215

Fixed

Cargo no longer buffers excessive amounts of compiler output in memory. #7838
Symbolic links in git repositories now work on Windows. #7996
Fixed an issue where profile.dev was not loaded from a config file with cargo test when the dev profile was not defined in Cargo.toml. #8012
When a binary is built as an implicit dependency of an integration test, it now checks dep_name/feature_name syntax in required-features correctly. #8020
Fixed an issue where Cargo would not detect that an executable (such as an integration test) needs to be rebuilt when the previous build was interrupted with Ctrl-C. #8087
Protect against some (unknown) situations where Cargo could panic when the system monotonic clock doesn't appear to be monotonic. #8114
Fixed panic with cargo clean -p if the package has a build script. #8216

Nightly only

Fixed panic with new feature resolver and required-features. #7962
Added RUSTC_WORKSPACE_WRAPPER environment variable, which provides a way to wrap rustc for workspace members only, and affects the filename hash so that artifacts produced by the wrapper are cached separately. This usage can be seen on nightly clippy with cargo clippy -Zunstable-options. #7533
Added --unit-graph CLI option to display Cargo's internal dependency graph as JSON. #7977
Changed -Zbuild_dep to -Zhost_dep, and added proc-macros to the feature decoupling logic. #8003 #8028
Fixed so that --crate-version is not automatically passed when the flag is found in RUSTDOCFLAGS. #8014
Fixed panic with -Zfeatures=dev_dep and check --profile=test. #8027
Fixed panic with -Zfeatures=itarget with certain host dependencies. #8048
Added support for -Cembed-bitcode=no, which provides a performance boost and disk-space usage reduction for non-LTO builds. #8066
-Zpackage-features has been extended with several changes intended to make it easier to select features on the command-line in a workspace. #8074

Cargo 1.43 (2020-04-23)

9d32b7b0...rust-1.43.0

Added

🔥 Profiles may now be specified in config files (and environment variables). docs #7823
❗ Added CARGO_BIN_EXE_<name> environment variable when building integration tests. This variable contains the path to any [[bin]] targets in the package. Integration tests should use the env! macro to determine the path to a binary to execute. docs #7697

Changed

cargo install --git now honors workspaces in a git repository. This allows workspace settings, like [patch], [replace], or [profile] to be used. #7768
cargo new will now run rustfmt on the new files to pick up rustfmt settings like tab_spaces so that the new file matches the user's preferred indentation settings. #7827
Environment variables printed with "very verbose" output (-vv) are now consistently sorted. #7877
Debug logging for fingerprint rebuild-detection now includes more information. #7888 #7890 #7952
Added warning during publish if the license-file doesn't exist. #7905
The license-file file is automatically included during publish, even if it is not explicitly listed in the include list or is in a location outside of the root of the package. #7905
CARGO_CFG_DEBUG_ASSERTIONS and CARGO_CFG_PROC_MACRO are no longer set when running a build script. These were inadvertently set in the past, but had no meaning as they were always true. Additionally, cfg(proc-macro) is no longer supported in a target expression. #7943 #7970

Fixed

Global command-line flags now work with aliases (like cargo -v b). #7837
Required-features using dependency syntax (like renamed_dep/feat_name) now handle renamed dependencies correctly. #7855
Fixed a rare situation where if a build script is run multiple times during the same build, Cargo will now keep the results separate instead of losing the output of the first execution. #7857
Fixed incorrect interpretation of environment variable CARGO_TARGET_*_RUNNER=true as a boolean. Also improved related env var error messages. #7891
Updated internal libgit2 library, bringing various fixes to git support. #7939
cargo package / cargo publish should no longer buffer the entire contents of each file in memory. #7946
Ignore more invalid Cargo.toml files in a git dependency. Cargo currently walks the entire repo to find the requested package. Certain invalid manifests were already skipped, and now it should skip all of them. #7947

Nightly only

Added build.out-dir config variable to set the output directory. #7810
Added -Zjobserver-per-rustc feature to support improved performance for parallel rustc. #7731
Fixed filename collision with build-std and crates like cc. #7860
-Ztimings will now save its report even if there is an error. #7872
Updated --config command-line flag to support taking a path to a config file to load. #7901
Added new feature resolver. #7820
Rustdoc docs now automatically include the version of the package in the side bar (requires -Z crate-versions flag). #7903

Cargo 1.42 (2020-03-12)

0bf7aafe...rust-1.42.0

Added

Added documentation on git authentication. #7658
Bitbucket Pipeline badges are now supported on crates.io. #7663
cargo vendor now accepts the --versioned-dirs option to force it to always include the version number in each package's directory name. #7631
The proc_macro crate is now automatically added to the extern prelude for proc-macro packages. This means that extern crate proc_macro; is no longer necessary for proc-macros. #7700

Changed

Emit a warning if debug_assertions, test, proc_macro, or feature= is used in a cfg() expression. #7660
Large update to the Cargo documentation, adding new chapters on Cargo targets, workspaces, and features. #7733
Windows: .lib DLL import libraries are now copied next to the dll for all Windows MSVC targets. Previously it was only supported for pc-windows-msvc. This adds DLL support for uwp-windows-msvc targets. #7758
The ar field in the [target] configuration is no longer read. It has been ignored for over 4 years. #7763
Bash completion file simplified and updated for latest changes. #7789
Credentials are only loaded when needed, instead of every Cargo command. #7774

Fixed

Removed --offline empty index check, which was a false positive in some cases. #7655
Files and directories starting with a . can now be included in a package by adding it to the include list. #7680
Fixed cargo login removing alternative registry tokens when previous entries existed in the credentials file. #7708
Fixed cargo vendor from panicking when used with alternative registries. #7718
Fixed incorrect explanation in the fingerprint debug log message. #7749
A [source] that is defined multiple times will now result in an error. Previously it was randomly picking a source, which could cause non-deterministic behavior. #7751
dep_kinds in cargo metadata are now de-duplicated. #7756
Fixed packaging where Cargo.lock was listed in .gitignore in a subdirectory inside a git repository. Previously it was assuming Cargo.lock was at the root of the repo. #7779
Partial file transfer errors will now cause an automatic retry. #7788
Linux: Fixed panic if CPU iowait stat decreases. #7803
Fixed using the wrong sysroot for detecting host compiler settings when --sysroot is passed in via RUSTFLAGS. #7798

Nightly only

build-std now uses --extern instead of --sysroot to find sysroot packages. #7699
Added --config command-line option to set config settings. #7649
Added include config setting which allows including another config file. #7649
Profiles in config files now support any named profile. Previously it was limited to dev/release. #7750

Cargo 1.41 (2020-01-30)

5da4b4d4...rust-1.41.0

Added

🔥 Cargo now uses a new Cargo.lock file format. This new format should support easier merges in source control systems. Projects using the old format will continue to use the old format, only new Cargo.lock files will use the new format. #7579
🔥 cargo install will now upgrade already installed packages instead of failing. #7560
🔥 Profile overrides have been added. This allows overriding profiles for individual dependencies or build scripts. See the documentation for more. #7591
Added new documentation for build scripts. #7565
Added documentation for Cargo's JSON output. #7595
Significant expansion of config and environment variable documentation. #7650
Add back support for BROWSER environment variable for cargo doc --open. #7576
Added kind and platform for dependencies in cargo metadata. #7132
The OUT_DIR value is now included in the build-script-executed JSON message. #7622

Changed

cargo doc will now document private items in binaries by default. #7593
Subcommand typo suggestions now include aliases. #7486
Tweak how the "already existing..." comment is added to .gitignore. #7570
Ignore cargo login text from copy/paste in token. #7588
Windows: Ignore errors for locking files when not supported by the filesystem. #7602
Remove **/*.rs.bk from .gitignore. #7647

Fixed

Fix unused warnings for some keys in the build config section. #7575
Linux: Don't panic when parsing /proc/stat. #7580
Don't show canonical path in cargo vendor. #7629

Nightly only

Cargo 1.40 (2019-12-19)

1c6ec66d...5da4b4d4

Added

Added http.ssl-version config option to control the version of TLS, along with min/max versions. #7308
🔥 Compiler warnings are now cached on disk. If a build generates warnings, re-running the build will now re-display the warnings. #7450
Added --filter-platform option to cargo metadata to narrow the nodes shown in the resolver graph to only packages included for the given target triple. #7376

Changed

Cargo's "platform" cfg parsing has been extracted into a separate crate named cargo-platform. #7375
Dependencies extracted into Cargo's cache no longer preserve mtimes to reduce syscall overhead. #7465
Windows: EXE files no longer include a metadata hash in the filename. This helps with debuggers correlating the filename with the PDB file. #7400
Wasm32: .wasm files are no longer treated as an "executable", allowing cargo test and cargo run to work properly with the generated .js file. #7476
crates.io now supports SPDX 3.6 licenses. #7481
Improved cyclic dependency error message. #7470
Bare cargo clean no longer locks the package cache. #7502
cargo publish now allows dev-dependencies without a version key to be published. A git or path-only dev-dependency will be removed from the package manifest before uploading. #7333
--features and --no-default-features in the root of a virtual workspace will now generate an error instead of being ignored. #7507
Generated files (like Cargo.toml and Cargo.lock) in a package archive now have their timestamp set to the current time instead of the epoch. #7523
The -Z flag parser is now more strict, rejecting more invalid syntax. #7531

Fixed

Fixed an issue where if a package had an include field, and Cargo.lock in .gitignore, and a binary or example target, and the Cargo.lock exists in the current project, it would fail to publish complaining the Cargo.lock was dirty. #7448
Fixed a panic in a particular combination of [patch] entries. #7452
Windows: Better error message when cargo test or rustc crashes in an abnormal way, such as a signal or seg fault. #7535

Nightly only

The mtime-on-use feature may now be enabled via the unstable.mtime_on_use config option. #7411
Added support for named profiles. #6989
Added -Zpanic-abort-tests to allow building and running tests with the "abort" panic strategy. #7460
Changed build-std to use --sysroot. #7421
Various fixes and enhancements to -Ztimings. #7395 #7398 #7397 #7403 #7428 #7429
Profile overrides have renamed the syntax to be [profile.dev.package.NAME]. #7504
Fixed warnings for unused profile overrides in a workspace. #7536

Cargo 1.39 (2019-11-07)

e853aa97...1c6ec66d

Added

Config files may now use the .toml filename extension. #7295
The --workspace flag has been added as an alias for --all to help avoid confusion about the meaning of "all". #7241
The publish field has been added to cargo metadata. #7354

Changed

Display more information if parsing the output from rustc fails. #7236
TOML errors now show the column number. #7248
cargo vendor no longer deletes files in the vendor directory that starts with a .. #7242
cargo fetch will now show manifest warnings. #7243
cargo publish will now check git submodules if they contain any uncommitted changes. #7245
In a build script, cargo:rustc-flags now allows -l and -L flags without spaces. #7257
When cargo install replaces an older version of a package it will now delete any installed binaries that are no longer present in the newly installed version. #7246
A git dependency may now also specify a version key when published. The git value will be stripped from the uploaded crate, matching the behavior of path dependencies. #7237
The behavior of workspace default-members has changed. The default-members now only applies when running Cargo in the root of the workspace. Previously it would always apply regardless of which directory Cargo is running in. #7270
libgit2 updated pulling in all upstream changes. #7275
Bump home dependency for locating home directories. #7277
zsh completions have been updated. #7296
SSL connect errors are now retried. #7318
The jobserver has been changed to acquire N tokens (instead of N-1), and then immediately acquires the extra token. This was changed to accommodate the cc crate on Windows to allow it to release its implicit token. #7344
The scheduling algorithm for choosing which crate to build next has been changed. It now chooses the crate with the greatest number of transitive crates waiting on it. Previously it used a maximum topological depth. #7390
RUSTFLAGS are no longer incorporated in the metadata and filename hash, reversing the change from 1.33 that added it. This means that any change to RUSTFLAGS will cause a recompile, and will not affect symbol munging. #7459

Fixed

Git dependencies with submodules with shorthand SSH URLs (like git@github.com/user/repo.git) should now work. #7238
Handle broken symlinks when creating .dSYM symlinks on macOS. #7268
Fixed issues with multiple versions of the same crate in a [patch] table. #7303
Fixed issue with custom target .json files where a substring of the name matches an unsupported crate type (like "bin"). #7363
Fixed issues with generating documentation for proc-macro crate types. #7159
Fixed hang if Cargo panics within a build thread. #7366
Fixed rebuild detection if a build.rs script issues different rerun-if directives between builds. Cargo was erroneously causing a rebuild after the change. #7373
Properly handle canonical URLs for [patch] table entries, preventing the patch from working after the first time it is used. #7368
Fixed an issue where integration tests were waiting for the package binary to finish building before starting their own build. They now may build concurrently. #7394
Fixed accidental change in the previous release on how --features a b flag is interpreted, restoring the original behavior where this is interpreted as --features a along with the argument b passed to the command. To pass multiple features, use quotes around the features to pass multiple features like --features "a b", or use commas, or use multiple --features flags. #7419

Nightly only

Basic support for building the standard library directly from Cargo has been added. (docs) #7216
Added -Ztimings feature to generate an HTML report on the time spent on individual compilation steps. This also may output completion steps on the console and JSON data. (docs) #7311
Added ability to cross-compile doctests. (docs) #6892

Cargo 1.38 (2019-09-26)

4c1fa54d...23ef9a4e

Added

🔥 Cargo build pipelining has been enabled by default to leverage more idle CPU parallelism during builds. #7143
The --message-format option to Cargo can now be specified multiple times and accepts a comma-separated list of values. In addition to the previous values it also now accepts json-diagnostic-short and json-diagnostic-rendered-ansi which configures the output coming from rustc in json message mode. #7214
Cirrus CI badges are now supported on crates.io. #7119
A new format for Cargo.lock has been introduced. This new format is intended to avoid source-control merge conflicts more often, and to generally make it safer to merge changes. This new format is not enabled at this time, though Cargo will use it if it sees it. At some point in the future, it is intended that this will become the default. #7070
Progress bar support added for FreeBSD. #7222

Changed

The -q flag will no longer suppress the root error message for an error from Cargo itself. #7116
The Cargo Book is now published with mdbook 0.3 providing a number of formatting fixes and improvements. #7140
The --features command-line flag can now be specified multiple times. The list of features from all the flags are joined together. #7084
Package include/exclude glob-vs-gitignore warnings have been removed. Packages may now use gitignore-style matching without producing any warnings. #7170
Cargo now shows the command and output when parsing rustc output fails when querying rustc for information like cfg values. #7185
cargo package/cargo publish now allows a symbolic link to a git submodule to include that submodule. #6817
Improved the error message when a version requirement does not match any versions, but there are pre-release versions available. #7191

Fixed

Fixed using the wrong directory when updating git repositories when using the git-fetch-with-cli config option, and the GIT_DIR environment variable is set. This may happen when running cargo from git callbacks. #7082
Fixed dep-info files being overwritten for targets that have separate debug outputs. For example, binaries on -apple- targets with .dSYM directories would overwrite the .d file. #7057
Fix [patch] table not preserving "one major version per source" rule. #7118
Ignore --remap-path-prefix flags for the metadata hash in the cargo rustc command. This was causing the remap settings to inadvertently affect symbol names. #7134
Fixed cycle detection in [patch] dependencies. #7174
Fixed cargo new leaving behind a symlink on Windows when core.symlinks git config is true. Also adds a number of fixes and updates from upstream libgit2. #7176
macOS: Fixed setting the flag to mark the target directory to be excluded from backups. #7192
Fixed cargo fix panicking under some situations involving multi-byte characters. #7221

Nightly only

Added cargo fix --clippy which will apply machine-applicable fixes from Clippy. #7069
Added -Z binary-dep-depinfo flag to add change tracking for binary dependencies like the standard library. #7137 #7219
cargo clippy-preview will always run, even if no changes have been made. #7157
Fixed exponential blowup when using CARGO_BUILD_PIPELINING. #7062
Fixed passing args to clippy in cargo clippy-preview. #7162

Cargo 1.37 (2019-08-15)

c4fcfb72...9edd0891

Added

Added doctest field to cargo metadata to determine if a target's documentation is tested. #6953 #6965
🔥 The cargo vendor command is now built-in to Cargo. This command may be used to create a local copy of the sources of all dependencies. #6869
🔥 The "publish lockfile" feature is now stable. This feature will automatically include the Cargo.lock file when a package is published if it contains a binary executable target. By default, Cargo will ignore Cargo.lock when installing a package. To force Cargo to use the Cargo.lock file included in the published package, use cargo install --locked. This may be useful to ensure that cargo install consistently reproduces the same result. It may also be useful when a semver-incompatible change is accidentally published to a dependency, providing a way to fall back to a version that is known to work. #7026
🔥 The default-run feature has been stabilized. This feature allows you to specify which binary executable to run by default with cargo run when a package includes multiple binaries. Set the default-run key in the [package] table in Cargo.toml to the name of the binary to use by default. #7056

Changed

cargo package now verifies that build scripts do not create empty directories. #6973
A warning is now issued if cargo doc generates duplicate outputs, which causes files to be randomly stomped on. This may happen for a variety of reasons (renamed dependencies, multiple versions of the same package, packages with renamed libraries, etc.). This is a known bug, which needs more work to handle correctly. #6998
Enabling a dependency's feature with --features foo/bar will no longer compile the current crate with the foo feature if foo is not an optional dependency. #7010
If --remap-path-prefix is passed via RUSTFLAGS, it will no longer affect the filename metadata hash. #6966
libgit2 has been updated to 0.28.2, which Cargo uses to access git repositories. This brings in hundreds of changes and fixes since it was last updated in November. #7018
Cargo now supports absolute paths in the dep-info files generated by rustc. This is laying the groundwork for tracking binaries, such as libstd, for rebuild detection. (Note: this contains a known bug.) #7030

Fixed

Fixed how zsh completions fetch the list of commands. #6956
"+ debuginfo" is no longer printed in the build summary when debug is set to 0. #6971
Fixed cargo doc with an example configured with doc = true to document correctly. #7023
Don't fail if a read-only lock cannot be acquired in CARGO_HOME. This helps when CARGO_HOME doesn't exist, but --locked is used which means CARGO_HOME is not needed. #7149
Reverted a change in 1.35 which released jobserver tokens when Cargo blocked on a lock file. It caused a deadlock in some situations. #7204

Nightly only

Added compiler message caching. The -Z cache-messages flag makes cargo cache the compiler output so that future runs can redisplay previous warnings. #6933
-Z mtime-on-use no longer touches intermediate artifacts. #7050

Cargo 1.36 (2019-07-04)

6f3e9c36...c4fcfb72

Added

Added more detailed documentation on target auto-discovery. #6898
🔥 Stabilize the --offline flag which allows using cargo without a network connection. #6934 #6871

Changed

publish = ["crates-io"] may be added to the manifest to restrict publishing to crates.io only. #6838
macOS: Only include the default paths if DYLD_FALLBACK_LIBRARY_PATH is not set. Also, remove /lib from the default set. #6856
cargo publish will now exit early if the login token is not available. #6854
HTTP/2 stream errors are now considered "spurious" and will cause a retry. #6861
Setting a feature on a dependency where that feature points to a required dependency is now an error. Previously it was a warning. #6860
The registry.index config value now supports relative file: URLs. #6873
macOS: The .dSYM directory is now symbolically linked next to example binaries without the metadata hash so that debuggers can find it. #6891
The default Cargo.toml template for now projects now includes a comment providing a link to the documentation. #6881
Some improvements to the wording of the crate download summary. #6916 #6920
✨ Changed RUST_LOG environment variable to CARGO_LOG so that user code that uses the log crate will not display cargo's debug output. #6918
Cargo.toml is now always included when packaging, even if it is not listed in package.include. #6925
Package include/exclude values now use gitignore patterns instead of glob patterns. #6924
Provide a better error message when crates.io times out. Also improve error messages with other HTTP response codes. #6936

Performance

Resolver performance improvements for some cases. #6853
Optimized how cargo reads the index JSON files by caching the results. #6880 #6912 #6940
Various performance improvements. #6867

Fixed

More carefully track the on-disk fingerprint information for dependencies. This can help in some rare cases where the build is interrupted and restarted. #6832
cargo run now correctly passes non-UTF8 arguments to the child process. #6849
Fixed bash completion to run on bash 3.2, the stock version in macOS. #6905
Various fixes and improvements to zsh completion. #6926 #6929
Fix cargo update ignoring -p arguments if the Cargo.lock file was missing. #6904

Nightly only

Added -Z install-upgrade feature to track details about installed crates and to update them if they are out-of-date. #6798
Added the public-dependency feature which allows tracking public versus private dependencies. #6772
Added build pipelining via the build.pipelining config option (CARGO_BUILD_PIPELINING env var). #6883
The publish-lockfile feature has had some significant changes. The default is now true, the Cargo.lock will always be published for binary crates. The Cargo.lock is now regenerated during publishing. cargo install now ignores the Cargo.lock file by default, and requires --locked to use the lock file. Warnings have been added if yanked dependencies are detected. #6840

Cargo 1.35 (2019-05-23)

6789d8a0...6f3e9c36

Added

Added the rustc-cdylib-link-arg key for build scripts to specify linker arguments for cdylib crates. #6298

Changed

When passing a test filter, such as cargo test foo, don't build examples (unless they set test = true). #6683
Forward the --quiet flag from cargo test to the libtest harness so that tests are actually quiet. #6358
The verification step in cargo package that checks if any files are modified is now stricter. It uses a hash of the contents instead of checking filesystem mtimes. It also checks all files in the package. #6740
Jobserver tokens are now released whenever Cargo blocks on a file lock. #6748
Issue a warning for a previous bug in the TOML parser that allowed multiple table headers with the same name. #6761
Removed the CARGO_PKG_* environment variables from the metadata hash and added them to the fingerprint instead. This means that when these values change, stale artifacts are not left behind. Also added the "repository" value to the fingerprint. #6785
cargo metadata no longer shows a null field for a dependency without a library in resolve.nodes.deps. The dependency is no longer shown. #6534
cargo new will no longer include an email address in the authors field if it is set to the empty string. #6802
cargo doc --open now works when documenting multiple packages. #6803
cargo install --path P now loads the .cargo/config file from the directory P. #6805
Using semver metadata in a version requirement (such as 1.0.0+1234) now issues a warning that it is ignored. #6806
cargo install now rejects certain combinations of flags where some flags would have been ignored. #6801
Resolver performance improvements for some cases. #6776

Fixed

Fixed running separate commands (such as cargo build then cargo test) where the second command could use stale results from a build script. #6720
Fixed cargo fix not working properly if a .gitignore file that matched the root package directory. #6767
Fixed accidentally compiling a lib multiple times if panic=unwind was set in a profile. #6781
Paths to JSON files in build.target config value are now canonicalized to fix building dependencies. #6778
Fixed re-running a build script if its compilation was interrupted (such as if it is killed). #6782
Fixed cargo new initializing a fossil repo. #6792
Fixed supporting updating a git repo that has a force push when using the git-fetch-with-cli feature. git-fetch-with-cli also shows more error information now when it fails. #6800
--example binaries built for the WASM target are fixed to no longer include a metadata hash in the filename, and are correctly emitted in the compiler-artifact JSON message. #6812

Nightly only

cargo clippy-preview is now a built-in cargo command. #6759
The build-override profile setting now includes proc-macros and their dependencies. #6811
Optional and target dependencies now work better with -Z offline. #6814

Cargo 1.34 (2019-04-11)

f099fe94...6789d8a0

Added

🔥 Stabilized support for alternate registries. #6654
Added documentation on using builds.sr.ht Continuous Integration with Cargo. #6565
Cargo.lock now includes a comment at the top that it is @generated. #6548
Azure DevOps badges are now supported. #6264
Added a warning if --exclude flag specifies an unknown package. #6679

Changed

cargo test --doc --no-run doesn't do anything, so it now displays an error to that effect. #6628
Various updates to bash completion: add missing options and commands, support libtest completions, use rustup for --target completion, fallback to filename completion, fix editing the command line. #6644
Publishing a crate with a [patch] section no longer generates an error. The [patch] section is removed from the manifest before publishing. #6535
build.incremental = true config value is now treated the same as CARGO_INCREMENTAL=1, previously it was ignored. #6688
Errors from a registry are now always displayed regardless of the HTTP response code. #6771

Fixed

Fixed bash completion for cargo run --example. #6578
Fixed a race condition when using a local registry and running multiple cargo commands at the same time that build the same crate. #6591
Fixed some flickering and excessive updates of the progress bar. #6615
Fixed a hang when using a git credential helper that returns incorrect credentials. #6681
Fixed resolving yanked crates with a local registry. #6750

Nightly only

Added -Z mtime-on-use flag to cause the mtime to be updated on the filesystem when a crate is used. This is intended to be able to track stale artifacts in the future for cleaning up unused files. #6477 #6573
Added experimental -Z dual-proc-macros to build proc macros for both the host and the target. #6547

Cargo 1.33 (2019-02-28)

8610973a...f099fe94

Added

compiler-artifact JSON messages now include an "executable" key which includes the path to the executable that was built. #6363
The man pages have been rewritten, and are now published with the web documentation. #6405
cargo login now displays a confirmation after saving the token. #6466
A warning is now emitted if a [patch] entry does not match any package. #6470
cargo metadata now includes the links key for a package. #6480
"Very verbose" output with -vv now displays the environment variables that cargo sets when it runs a process. #6492
--example, --bin, --bench, or --test without an argument now lists the available targets for those options. #6505
Windows: If a process fails with an extended status exit code, a human-readable name for the code is now displayed. #6532
Added --features, --no-default-features, and --all-features flags to the cargo package and cargo publish commands to use the given features when verifying the package. #6453

Changed

If cargo fix fails to compile the fixed code, the rustc errors are now displayed on the console. #6419
Hide the --host flag from cargo login, it is unused. #6466
Build script fingerprints now include the rustc version. #6473
macOS: Switched to setting DYLD_FALLBACK_LIBRARY_PATH instead of DYLD_LIBRARY_PATH. #6355
RUSTFLAGS is now included in the metadata hash, meaning that changing the flags will not overwrite previously built files. #6503
When updating the crate graph, unrelated yanked crates were erroneously removed. They are now kept at their original version if possible. This was causing unrelated packages to be downgraded during cargo update -p somecrate. #5702
TOML files now support the 0.5 TOML syntax.

Fixed

cargo fix will now ignore suggestions that modify multiple files. #6402
cargo fix will now only fix one target at a time, to deal with targets which share the same source files. #6434
Fixed bash completion showing the list of cargo commands. #6461
cargo init will now avoid creating duplicate entries in .gitignore files. #6521
Builds now attempt to detect if a file is modified in the middle of a compilation, allowing you to build again and pick up the new changes. This is done by keeping track of when the compilation starts not when it finishes. Also, #5919 was reverted, meaning that cargo does not treat equal filesystem mtimes as requiring a rebuild. #6484

Nightly only

Allow using registry names in [patch] tables instead of just URLs. #6456
cargo metadata added the registry key for dependencies. #6500
Registry names are now restricted to the same style as package names (alphanumeric, - and _ characters). #6469
cargo login now displays the /me URL from the registry config. #6466
cargo login --registry=NAME now supports interactive input for the token. #6466
Registries may now elide the api key from config.json to indicate they do not support API access. #6466
Fixed panic when using --message-format=json with metabuild. #6432
Fixed detection of publishing to crates.io when using alternate registries. #6525

Cargo 1.32 (2019-01-17)

339d9f9c...8610973a

Added

Registries may now display warnings after a successful publish. #6303
Added a glossary to the documentation. #6321
Added the alias c for cargo check. #6218

Changed

🔥 HTTP/2 multiplexing is now enabled by default. The http.multiplexing config value may be used to disable it. #6271
Use ANSI escape sequences to clear lines instead of spaces. #6233
Disable git templates when checking out git dependencies, which can cause problems. #6252
Include the --update-head-ok git flag when using the net.git-fetch-with-cli option. This can help prevent failures when fetching some repositories. #6250
When extracting a crate during the verification step of cargo package, the filesystem mtimes are no longer set, which was failing on some rare filesystems. #6257
crate-type = ["proc-macro"] is now treated the same as proc-macro = true in Cargo.toml. #6256
An error is raised if dependencies, features, target, or badges is set in a virtual workspace. Warnings are displayed if replace or patch is used in a workspace member. #6276
Improved performance of the resolver in some cases. #6283 #6366
.rmeta files are no longer hard-linked into the base target directory (target/debug). #6292
A warning is issued if multiple targets are built with the same output filenames. #6308
When using cargo build (without --release) benchmarks are now built using the "test" profile instead of "bench". This makes it easier to debug benchmarks, and avoids confusing behavior. #6309
User aliases may now override built-in aliases (b, r, t, and c). #6259
Setting autobins=false now disables auto-discovery of inferred targets. #6329
cargo verify-project will now fail on stable if the project uses unstable features. #6326
Platform targets with an internal . within the name are now allowed. #6255
cargo clean --release now only deletes the release directory. #6349

Fixed

Avoid adding extra angle brackets in email address for cargo new. #6243
The progress bar is disabled if the CI environment variable is set. #6281
Avoid retaining all rustc output in memory. #6289
If JSON parsing fails, and rustc exits nonzero, don't lose the parse failure message. #6290
Fixed renaming a project directory with build scripts. #6328
Fixed cargo run --example NAME to work correctly if the example sets crate_type = ["bin"]. #6330
Fixed issue with cargo package git discovery being too aggressive. The --allow-dirty now completely disables the git repo checks. #6280
Fixed build change tracking for [patch] deps which resulted in cargo build rebuilding when it shouldn't. #6493

Nightly only

Allow usernames in registry URLs. #6242
Added "compile_mode" key to the build-plan JSON structure to be able to distinguish running a custom build script versus compiling the build script. #6331
--out-dir no longer copies over build scripts. #6300

Cargo 1.31 (2018-12-06)

36d96825...339d9f9c

Added

🔥 Stabilized support for the 2018 edition. #5984 #5989
🔥 Added the ability to rename dependencies in Cargo.toml. #6319
🔥 Added support for HTTP/2 pipelining and multiplexing. Set the http.multiplexing config value to enable. #6005
Added http.debug configuration value to debug HTTP connections. Use CARGO_HTTP_DEBUG=true RUST_LOG=cargo::ops::registry cargo build to display the debug information. #6166
CARGO_PKG_REPOSITORY environment variable is set with the repository value from Cargo.toml when building . #6096

Changed

cargo test --doc now rejects other flags instead of ignoring them. #6037
cargo install ignores ~/.cargo/config. #6026
cargo version --verbose is now the same as cargo -vV. #6076
Comments at the top of Cargo.lock are now preserved. #6181
When building in "very verbose" mode (cargo build -vv), build script output is prefixed with the package name and version, such as [foo 0.0.1]. #6164
If cargo fix --broken-code fails to compile after fixes have been applied, the files are no longer reverted and are left in their broken state. #6316

Fixed

Windows: Pass Ctrl-C to the process with cargo run. #6004
macOS: Fix bash completion. #6038
Support arbitrary toolchain names when completing +toolchain in bash completion. #6038
Fixed edge cases in the resolver, when backtracking on failed dependencies. #5988
Fixed cargo test --all-targets running lib tests three times. #6039
Fixed publishing renamed dependencies to crates.io. #5993
Fixed cargo install on a git repo with multiple binaries. #6060
Fixed deeply nested JSON emitted by rustc being lost. #6081
Windows: Fix locking msys terminals to 60 characters. #6122
Fixed renamed dependencies with dashes. #6140
Fixed linking against the wrong dylib when the dylib existed in both target/debug and target/debug/deps. #6167
Fixed some unnecessary recompiles when panic=abort is used. #6170

Nightly only

Added --registry flag to cargo install. #6128
Added registry.default configuration value to specify the default registry to use if --registry flag is not passed. #6135
Added --registry flag to cargo new and cargo init. #6135

Cargo 1.30 (2018-10-25)

524a578d...36d96825

Added

🔥 Added an animated progress bar shows progress during building. #5995
Added resolve.nodes.deps key to cargo metadata, which includes more information about resolved dependencies, and properly handles renamed dependencies. #5871
When creating a package, provide more detail with -v when failing to discover if files are dirty in a git repository. Also fix a problem with discovery on Windows. #5858
Filters like --bin, --test, --example, --bench, or --lib can be used in a workspace without selecting a specific package. #5873
cargo run can be used in a workspace without selecting a specific package. #5877
cargo doc --message-format=json now outputs JSON messages from rustdoc. #5878
Added --message-format=short to show one-line messages. #5879
Added .cargo_vcs_info.json file to .crate packages that captures the current git hash. #5886
Added net.git-fetch-with-cli configuration option to use the git executable to fetch repositories instead of using the built-in libgit2 library. #5914
Added required-features to cargo metadata. #5902
cargo uninstall within a package will now uninstall that package. #5927
Added --allow-staged flag to cargo fix to allow it to run if files are staged in git. #5943
Added net.low-speed-limit config value, and also honor net.timeout for http operations. #5957
Added --edition flag to cargo new. #5984
Temporarily stabilized 2018 edition support for the duration of the beta. #5984 #5989
Added support for target.'cfg(…)'.runner config value to specify the run/test/bench runner for targets that use config expressions. #5959

Changed

Windows: cargo run will not kill child processes when the main process exits. #5887
Switched to the opener crate to open a web browser with cargo doc --open. This should more reliably select the system-preferred browser on all platforms. #5888
Equal file mtimes now cause a target to be rebuilt. Previously only if files were strictly newer than the last build would it cause a rebuild. #5919
Ignore build.target config value when running cargo install. #5874
Ignore RUSTC_WRAPPER for cargo fix. #5983
Ignore empty RUSTC_WRAPPER. #5985

Fixed

Fixed error when creating a package with an edition field in Cargo.toml. #5908
More consistently use relative paths for path dependencies in a workspace. #5935
cargo fix now always runs, even if it was run previously. #5944
Windows: Attempt to more reliably detect terminal width. msys-based terminals are forced to 60 characters wide. #6010
Allow multiple target flags with cargo doc --document-private-items. 6022

Nightly only

Added metabuild. #5628

Files

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CHANGELOG.md

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Changelog

Cargo 1.54 (2021-07-29)

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Cargo 1.53 (2021-06-17)

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Cargo 1.52 (2021-05-06)

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Cargo 1.51 (2021-03-25)

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Cargo 1.50 (2021-02-11)

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Cargo 1.49 (2020-12-31)

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Cargo 1.48 (2020-11-19)

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Cargo 1.47 (2020-10-08)

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Cargo 1.46 (2020-08-27)

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Cargo 1.45 (2020-07-16)

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Cargo 1.44 (2020-06-04)

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Cargo 1.43 (2020-04-23)

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Cargo 1.42 (2020-03-12)

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Cargo 1.41 (2020-01-30)

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Cargo 1.40 (2019-12-19)

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