Add test cases

Author: joshuaspence

tests/functional/fetchGit.sh

@@ -303,3 +303,26 @@ git -C "$empty" config user.name "Foobar"
 git -C "$empty" commit --allow-empty --allow-empty-message --message ""
 
 nix eval --impure --expr "let attrs = builtins.fetchGit $empty; in assert attrs.lastModified != 0; assert attrs.rev != \"0000000000000000000000000000000000000000\"; assert attrs.revCount == 1; true"
+
+# Test a repo with `eol=crlf`.
+repo="$TEST_ROOT/crlf"
+git init "$repo"
+git -C $repo config user.email "foobar@example.com"
+git -C $repo config user.name "Foobar"
+
+echo -n -e 'foo\nbar\nbaz' > "$repo/newlines.txt"
+echo -n -e 'foo\nbar\nbaz' > "$repo/test.txt"
+git -C "$repo" add newlines.txt test.txt
+git -C "$repo" commit -m 'Add files containing LF line endings'
+echo 'test.txt eol=crlf' > "$repo/.gitattributes"
+git -C "$repo" add .gitattributes
+git -C "$repo" commit -m 'Add eol=crlf to gitattributes'
+narhash=$(nix eval --raw --impure --expr "(builtins.fetchGit { url = \"$repo\"; ref = \"master\"; }).narHash")
+[[ "$narhash" = "sha256-k7u7RAaF+OvrbtT3KCCDQA8e9uOdflUo5zSgsosoLzA=" ]]
+
+# Ensure that NAR hash doesn't depend on user configuration.
+rm -rf $TEST_HOME/.cache/nix
+export GIT_CONFIG_GLOBAL="$TEST_ROOT/gitconfig"
+git config --global core.autocrlf true
+new_narhash=$(nix eval --raw --impure --expr "(builtins.fetchGit { url = \"$repo\"; ref = \"master\"; }).narHash")
+[[ "$new_narhash" = "$narhash" ]]