Break script back up, test via Actions

.github/workflows/ci.yml

@@ -10,11 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: bats-core/[email protected]
-        with:
-          support-path: /usr/lib/bats/bats-support
-          assert-path: /usr/lib/bats/bats-assert
-      - run: bats --recursive tests
-        env:
-          GH_TOKEN: ${{ github.token }}
-
+      - uses: ./
+      - run: |
+          env # TODO

README.md

@@ -36,6 +36,7 @@ Minimal inputs action to notify Slack of Job status
 | `slack-users`       | <p>A JSON object (as a string in the Yaml) mapping GitHub usernames to Slack User Ids (e.g. UXXXXXX). If present, the commit author is looked up in the map and the Slack user, if found, is at-mentioned in the notification details. If a Slack user is not found, an error is generated as a build annotation.</p> | `false`  | `""`                                    |
 | `slack-users-file`  | <p>Relative path within the repository to read the slack-users JSON from a file. The file is read from the default branch via the API.</p>                                                                                                                                                                            | `false`  | `""`                                    |
 | `github-token`      |                                                                                                                                                                                                                                                                                                                       | `false`  | `${{ github.token }}`                   |
+| `dry-run`           | <p>Don't actually notify (useful for testing)</p>                                                                                                                                                                                                                                                                     | `false`  | `false`                                 |
 
 <!-- action-docs-inputs source="action.yml" -->
 
@@ -113,6 +114,12 @@ This action is a `composite` action.
     #
     # Required: false
     # Default: ${{ github.token }}
+
+    dry-run:
+    # Don't actually notify (useful for testing)
+    #
+    # Required: false
+    # Default: false
 ```
 
 <!-- action-docs-usage action="action.yml" project="freckle/slack-notify-action" version="v1" -->

action.yml

@@ -59,30 +59,117 @@ inputs:
     required: false
     default: '${{ github.token }}'
 
+  dry-run:
+    description: "Don't actually notify (useful for testing)"
+    required: false
+    default: false
+
 runs:
   using: composite
+  env:
+    COMMIT_JSON: /tmp/commit.json
+    SLACK_USERS_JSON: /tmp/slack-users.json
+
   steps:
     - shell: bash
+      name: Fetch commit.json
+      run: gh api "/repos/${{ github.repository }}/commits/$COMMIT_SHA" | tee "$COMMIT_JSON"
+      env:
+        GH_TOKEN: ${{ inputs.github-token }}
+        COMMIT_SHA: ${{ inputs.commit-sha }}
+
+    - if: ${{ inputs.slack-users }}
+      shell: bash
+      name: Write slack-users.json from input
+      run: echo "$USERS" >"$SLACK_USERS_JSON"
+      env:
+        USERS: ${{ inputs.slack-users }}
+
+    - if: ${{ inputs.slack-users-file }}
+      shell: bash
+      name: Write slack-users.json from repository file
       run: |
-        echo "$GITHUB_ACTION_PATH/bin" >>"$GITHUB_PATH"
-        mkslackenv >>"$GITHUB_ENV" <<'EOM'
-        ${{ inputs.message }}
-        EOM
+        gh api "/repos/${{ github.repository }}/contents/$USERS_FILE" --jq '.content' |
+          base64 -d >"$SLACK_USERS_JSON"
       env:
         GH_TOKEN: ${{ inputs.github-token }}
+        USERS_FILE: ${{ inputs.slack-users-file }}
+
+    - shell: bash
+      name: Set SLACK_TITLE
+      run: |
+        event_name=$EVENT_NAME
+        event_name=${event_name:-${{ github.workflow }} ${{ github.job }}}
+
+        case "${{ job.status }}" in
+          success)
+            echo "SLACK_TITLE=$event_name succeeded"
+            echo "SLACK_COLOR=success"
+            ;;
+          failure)
+            echo "SLACK_TITLE=$event_name failed"
+            echo "SLACK_COLOR=danger"
+            ;;
+          cancelled)
+            echo "SLACK_TITLE=$event_name was cancelled"
+            echo "SLACK_COLOR=grey"
+            ;;
+        esac >> "$GITHUB_ENV"
+      env:
+        EVENT_NAME: ${{ inputs.event-name }}
+
+    - shell: bash
+      name: Set SLACK_MESSAGE
+      run: |
+        # https://unix.stackexchange.com/a/451250
+        relative_date() {
+          awk -v date="$(date +%s -d "$1")" -v now="$(date +%s)" '
+            BEGIN {  diff = now - date;
+               if (diff > (24*60*60)) printf "%.0f days ago", diff/(24*60*60);
+               else if (diff > (60*60)) printf "%.0f hours ago", diff/(60*60);
+               else if (diff > 60) printf "%.0f minutes ago", diff/60;
+               else printf "%s seconds ago", diff;
+            }'
+        }
+
+        get_slack_author() {
+          if [[ -f "$SLACK_USERS_JSON" ]]; then
+            author=$(jq -r ".\"$commit_author\" // \"unknown\" | \"<@\" + . + \">\"" "$SLACK_USERS_JSON")
+          else
+            author="$commit_author"
+          fi
+        }
+
+        commit_author=$(jq -r '.author.login' "$COMMIT_JSON")
+        commit_timestamp=$(jq -r '.commit.committer.date' "$COMMIT_JSON")
+        commit_timestamp_r=$(relative_date "$commit_timestamp")
+        commit_sha_short=$(jq -r '.sha' "$COMMIT_JSON" | head -c 7)
+        commit_url=$(jq -r '.url' "$COMMIT_JSON")
+
+        echo "SLACK_MESSAGE<<EOM"
+        printf '%s committed <%s|%s> %s (%s)\n' \
+          "$author" \
+          "$commit_url" \
+          "$commit_sha_short" \
+          "$commit_timestamp_r" \
+          "$commit_timestamp"
+        cat # extra message on stdin
+        echo "EOM"
+
+        if [[ "$author" == '<@unknown>' ]]; then
+          cat "$GITHUB_ACTION_PATH/unknown.txt" >&2
+        fi
+
+    - shell: bash
+      name: Set SLACK_FOOTER
+      run: |
+        gh --repo '${{ github.repository }}' run view '${{ github.run_id }}' \
+          --json jobs \
+          --jq '.jobs[] | select(.name == "${{ github.job }}") | "SLACK_FOOTER=" + .url' >>"$GITHUB_ENV"
 
-        # Some of these may already be set, but we'll be explicit
-        GITHUB_JOB: ${{ github.job }}
-        GITHUB_REPOSITORY: ${{ github.repository }}
-        GITHUB_RUN_ID: ${{ github.run_id }}
-        GITHUB_WORKFLOW: ${{ github.workflow }}
-        INPUTS_COMMIT_SHA: ${{ inputs.commit-sha }}
-        INPUTS_EVENT_NAME: ${{ inputs.event_name }}
-        INPUTS_SLACK_USERS: ${{ inputs.slack-users }}
-        INPUTS_SLACK_USERS_FILE: ${{ inputs.slack-users-file }}
-        JOB_STATUS: ${{ job.status }}
-
-    - uses: rtCamp/action-slack-notify@v2
+    - if: ${{ inputs.dry-run != 'true' }}
+      name: Notify
+      uses: rtCamp/action-slack-notify@v2
       env:
         MSG_MINIMAL: "true" # SLACK_MESSAGE will include all details
         SLACK_ICON: https://github.com/freckle-automation.png?size=48