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Feature: Add CACHEDIR.TAG to zig-cache #8210

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Ciantic opened this issue Mar 11, 2021 · 7 comments
Open

Feature: Add CACHEDIR.TAG to zig-cache #8210

Ciantic opened this issue Mar 11, 2021 · 7 comments
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accepted This proposal is planned. enhancement Solving this issue will likely involve adding new logic or components to the codebase. frontend Tokenization, parsing, AstGen, Sema, and Liveness. proposal This issue suggests modifications. If it also has the "accepted" label then it is planned.
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0.16.0

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@Ciantic
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Ciantic commented Mar 11, 2021 •
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Consider adding CACHEDIR.TAG to zig-cache directory.

It's just text file with ASCII text at the beginning:

Signature: 8a477f597d28d172789f06886806bc55

(The hexadecimal string is same on all CACHEDIR.TAG files.)

For example Rust does this, and plenty other things, it makes easier for backup tools to ignore the directory.
@daurnimator daurnimator added the enhancement Solving this issue will likely involve adding new logic or components to the codebase. label Mar 12, 2021
@daurnimator
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Do you have examples of tools that use CACHEDIR.TAG? this is the first I've heard of it.

@g-w1
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g-w1 commented Mar 12, 2021

Cargo uses it.
image

@andrewrk andrewrk added accepted This proposal is planned. proposal This issue suggests modifications. If it also has the "accepted" label then it is planned. frontend Tokenization, parsing, AstGen, Sema, and Liveness. labels Mar 12, 2021
@andrewrk andrewrk added this to the 0.9.0 milestone Mar 12, 2021
@mikdusan
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Do you have examples of tools that use CACHEDIR.TAG? this is the first I've heard of it.

from gnutar docs:

       --exclude-caches
              exclude contents of directories containing CACHEDIR.TAG, except for the tag file itself

       --exclude-caches-all
              exclude directories containing CACHEDIR.TAG

       --exclude-caches-under exclude everything under directories containing
              CACHEDIR.TAG

@Ciantic
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Ciantic commented Mar 12, 2021 •
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Kopia (my preferred backup tool at the moment) uses it by default

@andrewrk andrewrk modified the milestones: 0.9.0, 0.10.0 May 19, 2021
@perillo
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perillo commented Mar 10, 2023

Do you have examples of tools that use CACHEDIR.TAG? this is the first I've heard of it.

Restic and fontconfig supports it. I also opened an issue for rsync.

@perillo
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perillo commented Mar 10, 2023

What about adding CACHEDIR.TAG to the zig-out directory, too?

perillo added a commit to perillo/zig that referenced this issue Mar 10, 2023
@perillo
Add the CACHEDIR.TAG file to the cache directory
e5dce8a 
Implement the http://www.brynosaurus.com/cachedir/ specification for the
Zig cache directory.

This change will make it easier to exclude Zig cached data from a backup,
expecially when the directory is not a well-known cache directory, like
~/.cache/zig or zig-cache.

Closes ziglang#8210
@perillo perillo mentioned this issue Mar 10, 2023
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@dbrgn
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dbrgn commented Feb 15, 2025

Pika Backup also takes the CACHEDIR.tag file into account.

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accepted This proposal is planned. enhancement Solving this issue will likely involve adding new logic or components to the codebase. frontend Tokenization, parsing, AstGen, Sema, and Liveness. proposal This issue suggests modifications. If it also has the "accepted" label then it is planned.
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Add the CACHEDIR.TAG file to the cache directory perillo/zig
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@Ciantic @dbrgn @andrewrk @daurnimator @perillo @mikdusan @g-w1