Merge pull request #36 from boneskull/boneskull/allow-sha1-version

fix: use git_ref verbatim in event of tag determination failure

Author: rossjrw

lib/find-current-git-tag.sh

@@ -6,7 +6,7 @@ helpFunction() {
   echo -e "\t-p GitHub repository to clone, format: owner/repo"
   echo -e "\t-f Reference of repository to clone"
   exit 1
-}
+} >&2
 
 while getopts "p:f:" opt; do
   case "$opt" in
@@ -17,17 +17,18 @@ while getopts "p:f:" opt; do
 done
 
 if [ -z "$github_repository" ] || [ -z "$git_ref" ]; then
-  echo "some parameters are empty"
+  echo >&2 "some parameters are empty"
   helpFunction
 fi
 
-echo "Cloning repository $github_repository at ref $git_ref"
-git clone --bare --single-branch --branch "$git_ref" "https://github.com/$github_repository" bare_pr_preview
-
-cd bare_pr_preview || exit 1
-
-action_version=$(git describe --tags --match "v*.*.*" \
-  || git describe --tags \
-  || git rev-parse HEAD)
-
-echo "action_version=$action_version" >> "$GITHUB_ENV"
+echo >&2 "Determining preview action version"
+echo >&2 "Cloning repository $github_repository at ref $git_ref"
+if git clone --bare --single-branch --branch "$git_ref" "https://github.com/$github_repository" bare_pr_preview; then
+  echo >&2 "Finding most specific tag matching tag $git_ref"
+  action_version=$(git describe --tags --match "v*.*.*" || git describe --tags || git rev-parse HEAD)
+  echo >&2 "Found $action_version"
+  echo "action_version=$action_version" >>"$GITHUB_ENV"
+else
+  echo >&2 "Clone failed; using truncated ref as action version"
+  echo "action_version=${git_ref:0:9}" >>"$GITHUB_ENV"
+fi