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pkgs/build-support/fetchgit: add fetchTags parameter

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Added fetchTags feature to fetchgit, explicit and clear support for
fetching all tags after the source tree fetch completes. Doing this at
build-time in the fetcher is required for packages that invoke commands
like 'git describe' which require tags, and since the nix store is
read-only by design, it is not possible to git fetch --tags at
activation- or run-time. This feature may have been possible by
specifying a postFetch option including calling git fetch --tags,
however doing so obfuscates the solution to this very real problem.
Explicit support for fetching tags should be a first class citizen just
like fetching other refs.
This commit is contained in:
Tim Black 2025-05-27 15:25:19 -07:00
parent fdf56ea522
commit 1247031689
6 changed files with 33 additions and 1 deletions
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4
doc/build-helpers/fetchers.chapter.md
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@ -795,6 +795,10 @@ Additionally, the following optional arguments can be given:
: Clone the entire repository as opposing to just creating a shallow clone.
This implies `leaveDotGit`.
*`fetchTags`* (Boolean)
: Whether to fetch all tags from the remote repository. This is useful when the build process needs to run `git describe` or other commands that require tag information to be available. This parameter implies `leaveDotGit`, as tags are stored in the `.git` directory.
*`sparseCheckout`* (List of String)
: Prevent git from fetching unnecessary blobs from server.