Skip to content

rpmpack (tar2rpm) - package rpms in pure golang or cli

License

Notifications You must be signed in to change notification settings

cristianciutea/rpmpack

 
 

Repository files navigation

rpmpack (tar2rpm) - package rpms the easy way

Disclaimer

This is not an official Google product, it is just code that happens to be owned by Google.

Overview

tar2rpm is a tool that takes a tar and outputs an rpm. rpmpack is a golang library to create rpms. Both are written in pure go, without using rpmbuild or spec files. API documentation for rpmpack can be found in GoDoc.

Installation

$ go get -u github.com/google/rpmpack/...

This will make the tar2rpm tool available in ${GOPATH}/bin, which by default means ~/go/bin.

Usage of the binary (tar2rpm)

tar2rpm takes a tar file (from stdin or a specified filename), and outputs an rpm.

Usage:
  tar2rpm [OPTION] [FILE]
Options:
  -file FILE
        write rpm to FILE instead of stdout
  -name string
        the package name
  -release string
        the rpm release
  -version string
        the package version

Usage of the library (rpmpack)

API documentation for rpmpack can be found in GoDoc.

import "github.com/google/rpmpack"
...
r, err := rpmpack.NewRPM(rpmpack.RPMMetaData{Name: "example", Version: "3"})
if err != nil {
  ...
}
r.AddFile(rpmpack.RPMFile{
    Name: "/usr/local/hello",
    Body: []byte("content of the file"),
})
if err := r.Write(w); err != nil {
  ...
}

Usage in the bazel build system (pkg_tar2rpm)

There is a working example inside example_bazel

In WORKSPACE

load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
git_repository(
    name = "rpmpack",
    remote = "https://github.com/google/rpmpack.git",
   branch = "master",
)

# The following will load the requirements to build rpmpack
http_archive(
      name = "io_bazel_rules_go",
      sha256 = "ae8c36ff6e565f674c7a3692d6a9ea1096e4c1ade497272c2108a810fb39acd2",
      urls = ["https://github.com/bazelbuild/rules_go/releases/download/0.19.4/rules_go-0.19.4.tar.gz"],
  )
http_archive(
      name = "bazel_gazelle",
      sha256 = "7fc87f4170011201b1690326e8c16c5d802836e3a0d617d8f75c3af2b23180c4",
      urls = ["https://github.com/bazelbuild/bazel-gazelle/releases/download/0.18.2/bazel-gazelle-0.18.2.tar.gz"],
  )

load("@com_github_google_rpmpack//:deps.bzl", "rpmpack_dependencies")

rpmpack_dependencies()

In BUILD or BUILD.bazel

load("@bazel_tools//tools/build_defs/pkg:pkg.bzl", "pkg_tar")
load("@com_github_google_rpmpack//:def.bzl", "pkg_tar2rpm")

pkg_tar(
    name = "rpmtest-tar",
    srcs = [":content1.txt"],
    mode = "0644",
    ownername = "root.root",
    package_dir = "var/lib/rpmpack",
)

pkg_tar2rpm(
    name = "rpmtest",
    data = ":rpmtest-tar",
    pkg_name = "rpmtest",
    release = "3.4",
    version = "1.2",
    prein = "echo \"This is preinst\" > /tmp/preinst.txt",
)

Features

  • You put files into the rpm, so that rpm/yum will install them on a host.
  • Simple.
  • No spec files.
  • Does not build anything.
  • Does not try to auto-detect dependencies.
  • Does not try to magically deduce on which computer architecture you run.
  • Does not require any rpm database or other state, and does not use the filesystem.

Downsides

  • Is not related to the team the builds rpmlib.
  • May easily wreak havoc on rpm based systems. It is surprisingly easy to cause rpm to segfault on corrupt rpm files.
  • Many features are missing.
  • All of the artifacts are stored in memory, sometimes more than once.
  • Less backwards compatible than rpmbuild.

Philosophy

Sometimes you just want files to make it to hosts, and be managed by the package manager. rpmbuild can use a spec file, together with a specific directory layout and local database, to build/install/package your files. But you don't need all that. You want something similar to tar.

As the project progresses, we must maintain the complexity/value ratio. This includes both code complexity and interface complexity.

Disclaimer

This is not an official Google product, it is just code that happens to be owned by Google.

About

rpmpack (tar2rpm) - package rpms in pure golang or cli

Resources

License

Stars

Watchers

Forks

Packages

No packages published

Languages

  • Go 76.5%
  • Starlark 21.9%
  • Shell 1.6%