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fetchGit: don't prefix "refs/heads/" on ref = "HEAD" #4676

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Mar 30, 2021
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fetchGit: don't prefix "refs/heads/" on ref = "HEAD" #4676

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edd606a
fetchGit: don't prefix "refs/heads/" on ref = "HEAD"
bjornfor Mar 27, 2021
f2a799b
tests: check that builtins.fetchGit { ..., ref = "HEAD"; } works
bjornfor Mar 30, 2021
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4 changes: 3 additions & 1 deletion src/libfetchers/git.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -365,7 +365,9 @@ struct GitInputScheme : InputScheme
? "refs/*"
: ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
: ref == "HEAD"
? *ref
: "refs/heads/" + *ref;
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", fetchRef, fetchRef) });
} catch (Error & e) {
if (!pathExists(localRefFile)) throw;
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10 changes: 10 additions & 0 deletions tests/fetchGit.sh
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Expand Up @@ -179,3 +179,13 @@ git clone --depth 1 file://$repo $TEST_ROOT/shallow
path6=$(nix eval --impure --raw --expr "(builtins.fetchTree { type = \"git\"; url = \"file://$TEST_ROOT/shallow\"; ref = \"dev\"; shallow = true; }).outPath")
[[ $path3 = $path6 ]]
[[ $(nix eval --impure --expr "(builtins.fetchTree { type = \"git\"; url = \"file://$TEST_ROOT/shallow\"; ref = \"dev\"; shallow = true; }).revCount or 123") == 123 ]]

# Explicit ref = "HEAD" should work, and produce the same outPath as without ref
path7=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"HEAD\"; }).outPath")
path8=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; }).outPath")
[[ $path7 = $path8 ]]

# ref = "HEAD" should fetch the HEAD revision
rev4=$(git -C $repo rev-parse HEAD)
rev4_nix=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"HEAD\"; }).rev")
[[ $rev4 = $rev4_nix ]]