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-rw-r--r--src/libexpr/primops/fetchGit.cc6
-rw-r--r--tests/fetchGit.sh26
2 files changed, 31 insertions, 1 deletions
diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index e92e06380..0d0b11958 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -23,7 +23,7 @@ struct GitInfo
};
GitInfo exportGit(ref<Store> store, const std::string & uri,
- std::experimental::optional<std::string> ref, const std::string & rev,
+ std::experimental::optional<std::string> ref, std::string rev,
const std::string & name)
{
if (!ref && rev == "" && hasPrefix(uri, "/") && pathExists(uri + "/.git")) {
@@ -68,6 +68,10 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
return gitInfo;
}
+
+ // clean working tree, but no ref or rev specified. Use 'HEAD'.
+ rev = chomp(runProgram("git", true, { "-C", uri, "rev-parse", "HEAD" }));
+ ref = "HEAD"s;
}
if (!ref) ref = "master"s;
diff --git a/tests/fetchGit.sh b/tests/fetchGit.sh
index 09e4f7426..65d673c08 100644
--- a/tests/fetchGit.sh
+++ b/tests/fetchGit.sh
@@ -93,3 +93,29 @@ git -C $repo add hello
git -C $repo commit -m 'Bla4'
rev3=$(git -C $repo rev-parse HEAD)
nix eval --tarball-ttl 3600 "(builtins.fetchGit { url = $repo; rev = \"$rev3\"; })" >/dev/null
+
+# Update 'path' to reflect latest master
+path=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
+
+# Check behavior when non-master branch is used
+git -C $repo checkout $rev2 -b dev
+echo dev > $repo/hello
+
+# File URI uses 'master' unless specified otherwise
+path2=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
+[[ $path = $path2 ]]
+
+# Using local path with branch other than 'master' should work when clean or dirty
+path3=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
+# (check dirty-tree handling was used)
+[[ $(nix eval --raw "(builtins.fetchGit $repo).rev") = 0000000000000000000000000000000000000000 ]]
+
+# Committing shouldn't change store path, or switch to using 'master'
+git -C $repo commit -m 'Bla5' -a
+path4=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
+[[ $(cat $path4/hello) = dev ]]
+[[ $path3 = $path4 ]]
+
+# Confirm same as 'dev' branch
+path5=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath")
+[[ $path3 = $path5 ]]