#!/bin/sh

set -e

repo_dir="`mktemp -d`"
repo="$repo_dir/repo"
git init "$repo"
(
  cd "$repo"
  echo Contents > test-file
  git add test-file
  git commit -m 'Commit message'
)

conf="`mktemp`"
cat > "$conf" <<EOF
[foo]
git_repo = file://$repo
git_ref = master
EOF

python3 ./pinch.py pin "$conf"

(
  cd "$repo"
  echo Other contents > other-file
  git add other-file
  git commit -m 'Second commit message'
)

python3 ./pinch.py pin "$conf"

actual_env_command=`python3 ./pinch.py update --dry-run "$conf"`

rm -rf "$repo_dir" "$conf"

expected_env_command_RE='^nix-env --profile /nix/var/nix/profiles/per-user/[^/]+/channels --show-trace --file '\''<nix/unpack-channel.nix>'\'' --install --from-expression '\''f: f \{ name = "(repo-[0-9]{10}-[0-9a-f]{11})"; channelName = "foo"; src = builtins.storePath "/nix/store/.{32}-\1.tar.xz"; \}'\''$'

if echo "$actual_env_command" | egrep "$expected_env_command_RE" > /dev/null;then
  echo PASS
else
  echo "Output:   $actual_env_command"
  echo "does not match RE: $expected_env_command_RE"
  exit 1
fi