fixing up GitHub action to work with yaml syntax

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

README.md

@@ -5,31 +5,40 @@ whenever a branch with some prefix is pushed to. The idea is that you can
 set up some workflow that pushes content to branches of the repostory,
 and you would then want this push reviewed for merge to master.
 
-Here is an example of what to put in your `.github/main.workflow` file to
+Here is an example of what to put in your `.github/workflows/pull-request.yml` file to
 trigger the action.
 
-```
+```yaml
-workflow "Create Pull Request" {
+name: Pull Request on Branch Push
-  on = "push"
+on:
-  resolves = "Create New Pull Request"
+  push:
-}
+    branches-ignore:
-
+      - staging
-action "Create New Pull Request" {
+      - launchpad
-  uses = "vsoch/pull-request-action@master"
+      - production
-  secrets = [
+jobs:
-    "GITHUB_TOKEN"
+  auto-pull-request:
-  ]
+    name: PullRequestAction
-  env = {
+    runs-on: ubuntu-latest
-    BRANCH_PREFIX = "update/"
+    steps:
-    PULL_REQUEST_BRANCH = "master"
+      - name: pull-request-action
-  }
+        uses: vsoch/pull-request-action@master
-}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BRANCH_PREFIX: "update/"
+          PULL_REQUEST_BRANCH: "master"
 ```
 
 Environment variables include:
 
   - **BRANCH_PREFIX**: the prefix to filter to. If the branch doesn't start with the prefix, it will be ignored
   - **PULL_REQUEST_BRANCH**: the branch to issue the pull request to. Defaults to master.
+  - **PULL_REQUEST_BODY**: the body for the pull request (optional)
+  - **PULL_REQUEST_TITLE**: the title for the pull request  (optional)
+  - **PULL_REQUEST_DRAFT**: should the pull request be a draft PR? (optional; unset defaults to `false`)
+
+The `GITHUB_TOKEN` secret is required to interact and authenticate with the GitHub API to open
+the pull request.
 
 ## Example use Case: Update Registry
 
@@ -42,4 +51,6 @@ registry to update it.
  - the container collection metadata is pushed to a new branch on the registry repository, with namespace matching the GitHub repository, meaning that each GitHub repository always has a unique branch for its content.
  - pushing this branch that starts with the prefix (update/<namespace>) triggers the GitHub actions to open the pull request.
 
-If the branch is already open for PR, it updates it.
+If the branch is already open for PR, it updates it. Take a look at [this example](https://github.com/singularityhub/registry-org/pull/8)
+for the pull request opened when we updated the previous GitHub syntax to the new yaml syntax. Although this
+doesn't describe the workflow above, it works equivalently in terms of the triggers.

pull-request.sh

@@ -12,7 +12,7 @@ API_VERSION=v3
 BASE=https://api.github.com
 AUTH_HEADER="Authorization: token ${GITHUB_TOKEN}"
 HEADER="Accept: application/vnd.github.${API_VERSION}+json"
-HEADER="${HEADER}; application/vnd.github.antiope-preview+json"
+HEADER="${HEADER}; application/vnd.github.antiope-preview+json; application/vnd.github.shadow-cat-preview+json"
 
 # URLs
 REPO_URL="${BASE}/repos/${GITHUB_REPOSITORY}"
@@ -44,12 +44,15 @@ check_events_json() {
 
 create_pull_request() {
 
-    SOURCE=${1}  # from this branch
+    SOURCE="${1}"  # from this branch
-    TARGET=${2}  # pull request TO this target
+    TARGET="${2}"  # pull request TO this target
+    BODY="${3}"    # this is the content of the message
+    TITLE="${4}"   # pull request title
+    DRAFT="${5}"   # if PRs are draft
 
     # Check if the branch already has a pull request open 
 
-    DATA="{\"base\":\"${TARGET}\", \"head\":\"${SOURCE}\"}"
+    DATA="{\"base\":\"${TARGET}\", \"head\":\"${SOURCE}\", \"body\":\"${BODY}\"}"
     RESPONSE=$(curl -sSL -H "${AUTH_HEADER}" -H "${HEADER}" --user "${GITHUB_ACTOR}" -X GET --data "${DATA}" ${PULLS_URL})
     PR=$(echo "${RESPONSE}" | jq --raw-output '.[] | .head.ref')
     echo "Response ref: ${PR}"
@@ -60,11 +63,8 @@ create_pull_request() {
 
     # Option 2: Open a new pull request
     else
-        TITLE="Update container ${SOURCE}"
-        BODY="This is an automated pull request to update the container collection ${SOURCE}"
-
         # Post the pull request
-        DATA="{\"title\":\"${TITLE}\", \"base\":\"${TARGET}\", \"head\":\"${SOURCE}\"}"
+        DATA="{\"title\":\"${TITLE}\", \"base\":\"${TARGET}\", \"head\":\"${SOURCE}\", \"draft\":\"${DRAFT}\"}"
         echo "curl --user ${GITHUB_ACTOR} -X POST --data ${DATA} ${PULLS_URL}"
         curl -sSL -H "${AUTH_HEADER}" -H "${HEADER}" --user "${GITHUB_ACTOR}" -X POST --data "${DATA}" ${PULLS_URL}
         echo $?
@@ -91,6 +91,14 @@ main () {
     fi
     echo "Pull requests will go to ${PULL_REQUEST_BRANCH}"
 
+    if [ -z "${PULL_REQUEST_DRAFT}" ]; then
+        echo "No explicit preference for draft PR: created PRs will be normal PRs."
+        PULL_REQUEST_DRAFT="false"
+    else
+        echo "Environment variable PULL_REQUEST_DRAFT set to a value: created PRs will be draft PRs."
+        PULL_REQUEST_DRAFT="true"
+    fi
+
     # Get the name of the action that was triggered
     BRANCH=$(jq --raw-output .ref "${GITHUB_EVENT_PATH}");
     BRANCH=$(echo "${BRANCH/refs\/heads\//}")
@@ -106,7 +114,22 @@ main () {
 
             # Ensure we have a GitHub token
             check_credentials
-            create_pull_request $BRANCH $PULL_REQUEST_BRANCH
+
+            # Pull request body (optional)
+            if [ -z "${PULL_REQUEST_BODY}" ]; then
+                echo "No pull request body is set, will use default."
+                PULL_REQUEST_BODY="This is an automated pull request to update the container collection ${BRANCH}"
+                echo "Pull request body is ${PULL_REQUEST_BODY}"
+            fi
+ 
+            # Pull request title (optional)
+            if [ -z "${PULL_REQUEST_TITLE}" ]; then
+                echo "No pull request title is set, will use default."
+                PULL_REQUEST_TITLE="Update container ${BRANCH}"
+                echo "Pull request title is ${PULL_REQUEST_TITLE}"
+            fi
+
+            create_pull_request $BRANCH $PULL_REQUEST_BRANCH $PULL_REQUEST_BODY $PULL_REQUEST_TITLE $PULL_REQUEST_DRAFT
 
         fi