Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10' r/724

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1adf74a3706efbcb0ea4625da106fb2
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

1 files changed, 141 insertions, 0 deletions

diff --git a/third_party/nix/tests/fetchGit.sh b/third_party/nix/tests/fetchGit.sh
new file mode 100644
index 000000000000..4c46bdf0465b
--- /dev/null
+++ b/third_party/nix/tests/fetchGit.sh
@@ -0,0 +1,141 @@
+source common.sh
+
+if [[ -z $(type -p git) ]]; then
+    echo "Git not installed; skipping Git tests"
+    exit 99
+fi
+
+clearStore
+
+repo=$TEST_ROOT/git
+
+rm -rf $repo ${repo}-tmp $TEST_HOME/.cache/nix/gitv2
+
+git init $repo
+git -C $repo config user.email "foobar@example.com"
+git -C $repo config user.name "Foobar"
+
+echo utrecht > $repo/hello
+touch $repo/.gitignore
+git -C $repo add hello .gitignore
+git -C $repo commit -m 'Bla1'
+rev1=$(git -C $repo rev-parse HEAD)
+
+echo world > $repo/hello
+git -C $repo commit -m 'Bla2' -a
+rev2=$(git -C $repo rev-parse HEAD)
+
+# Fetch the default branch.
+path=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
+[[ $(cat $path/hello) = world ]]
+
+# In pure eval mode, fetchGit without a revision should fail.
+[[ $(nix eval --raw "(builtins.readFile (fetchGit file://$repo + \"/hello\"))") = world ]]
+(! nix eval --pure-eval --raw "(builtins.readFile (fetchGit file://$repo + \"/hello\"))")
+
+# Fetch using an explicit revision hash.
+path2=$(nix eval --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev2\"; }).outPath")
+[[ $path = $path2 ]]
+
+# In pure eval mode, fetchGit with a revision should succeed.
+[[ $(nix eval --pure-eval --raw "(builtins.readFile (fetchGit { url = file://$repo; rev = \"$rev2\"; } + \"/hello\"))") = world ]]
+
+# Fetch again. This should be cached.
+mv $repo ${repo}-tmp
+path2=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
+[[ $path = $path2 ]]
+
+[[ $(nix eval "(builtins.fetchGit file://$repo).revCount") = 2 ]]
+[[ $(nix eval --raw "(builtins.fetchGit file://$repo).rev") = $rev2 ]]
+
+# But with TTL 0, it should fail.
+(! nix eval --tarball-ttl 0 "(builtins.fetchGit file://$repo)" -vvvvv)
+
+# Fetching with a explicit hash should succeed.
+path2=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev2\"; }).outPath")
+[[ $path = $path2 ]]
+
+path2=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev1\"; }).outPath")
+[[ $(cat $path2/hello) = utrecht ]]
+
+mv ${repo}-tmp $repo
+
+# Using a clean working tree should produce the same result.
+path2=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
+[[ $path = $path2 ]]
+
+# Using an unclean tree should yield the tracked but uncommitted changes.
+mkdir $repo/dir1 $repo/dir2
+echo foo > $repo/dir1/foo
+echo bar > $repo/bar
+echo bar > $repo/dir2/bar
+git -C $repo add dir1/foo
+git -C $repo rm hello
+
+path2=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
+[ ! -e $path2/hello ]
+[ ! -e $path2/bar ]
+[ ! -e $path2/dir2/bar ]
+[ ! -e $path2/.git ]
+[[ $(cat $path2/dir1/foo) = foo ]]
+
+[[ $(nix eval --raw "(builtins.fetchGit $repo).rev") = 0000000000000000000000000000000000000000 ]]
+
+# ... unless we're using an explicit ref or rev.
+path3=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"master\"; }).outPath")
+[[ $path = $path3 ]]
+
+path3=$(nix eval --raw "(builtins.fetchGit { url = $repo; rev = \"$rev2\"; }).outPath")
+[[ $path = $path3 ]]
+
+# Committing should not affect the store path.
+git -C $repo commit -m 'Bla3' -a
+
+path4=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit file://$repo).outPath")
+[[ $path2 = $path4 ]]
+
+# tarball-ttl should be ignored if we specify a rev
+echo delft > $repo/hello
+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 ]]
+
+
+# Nuke the cache
+rm -rf $TEST_HOME/.cache/nix/gitv2
+
+# Try again, but without 'git' on PATH
+NIX=$(command -v nix)
+# This should fail
+(! PATH= $NIX eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath" )
+
+# Try again, with 'git' available.  This should work.
+path5=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath")
+[[ $path3 = $path5 ]]