Add output flag: has_refs

.github/workflows/test.yml → .github/workflows/test-with-refs.yml

@@ -1,5 +1,5 @@
 ---
-name: test
+name: test-with
 on:
   pull_request:
 

.github/workflows/test-without-refs.yml

@@ -0,0 +1,55 @@
+---
+name: test-without
+on:
+  pull_request:
+
+jobs:
+  get-matrix:
+    runs-on: ubuntu-latest
+    name: get-matrix
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Fetch matrix
+        id: set-matrix
+        uses: ./
+        with:
+          repository_default_branch: master
+          branches: ""
+          tags: ""
+          num_latest_tags: 0
+
+  info:
+    needs: [get-matrix]
+    runs-on: ubuntu-latest
+    name: info
+    steps:
+      - name: Show outputs (raw)
+        run: |
+          echo ${{ needs.get-matrix.outputs.matrix }}
+      - name: Show outputs (json)
+        run: |
+          echo ${{ fromJson(needs.get-matrix.outputs.matrix) }}
+
+  build:
+    needs: [get-matrix]
+    runs-on: ubuntu-latest
+    name: build
+    strategy:
+      fail-fast: false
+      matrix:
+        refs:
+          - ${{ fromJson(needs.get-matrix.outputs.matrix) }}
+    steps:
+      - name: "[SETUP] Checkout repository (ref: ${{ matrix.refs }})"
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          ref: ${{ matrix.refs }}
+      - name: Show git
+        run: |
+          git log | head -20

README.md

@@ -3,7 +3,8 @@
 [![GitHub release](https://img.shields.io/github/release/cytopia/git-ref-matrix-action.svg?logo=github)](/~https://github.com/cytopia/git-ref-matrix-action/releases/latest)
 [![GitHub marketplace](https://img.shields.io/badge/marketplace-git--ref--matrix--action-blue?logo=github)](/~https://github.com/marketplace/actions/git-ref-matrix-action)
 [![](https://img.shields.io/badge/github-cytopia%2Fgit--ref--matrix--action-red.svg?logo=github)](/~https://github.com/cytopia/git-ref-matrix-action "github.com/cytopia/git-ref-matrix-action")
-[![test](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test.yml/badge.svg)](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test.yml)
+[![test-with](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test.yml/badge.svg)](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test-with.yml)
+[![test-without](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test.yml/badge.svg)](/~https://github.com/cytopia/git-ref-matrix-action/actions/workflows/test-without.yml)
 
 This composite action creates a stringified JSON list of git refs to be used as a build matrix.
 
@@ -22,9 +23,10 @@ The following inputs can be used to alter the Docker tag name determination:
 
 ## :arrow_backward: Outputs
 
-| Output       | Description                                                   |
-|--------------|---------------------------------------------------------------|
-| `matrix`     | Stringified JSON build matrix. Example: `["master","v0.1.0"]` |
+| Output       | Description                                                                 |
+|--------------|-----------------------------------------------------------------------------|
+| `matrix`     | Stringified JSON build matrix. Example: `["master","v0.1.0"]`               |
+| `has_refs`   | Flag (0 or 1) that tells if we have matrix refs or not. Example: `0` or `1` |
 
 
 ## :computer: Usage

action.yml

@@ -27,8 +27,11 @@ inputs:
 
 outputs:
   matrix:
-    description: "Stringified JSON build matrix for defined git refs."
+    description: "Stringified JSON build matrix for defined git refs. (list of strings)"
     value: ${{ steps.set-matrix.outputs.matrix }}
+  has_refs:
+    description: "Flag (0 or 1) that tells if we have matrix (list not empty) refs or not (list empty)."
+    value: ${{ steps.set-matrix.outputs.has_refs }}
 
 runs:
   using: "composite"
@@ -46,18 +49,21 @@ runs:
       id: set-matrix
       shell: bash
       run: |
-
         ###
         ### Convert comma separated branches and tags to newline separated
         ###
         BRANCHES="$( echo "${{ inputs.branches }}" | sed 's/,/\n/g' )"
         TAGS="$( echo "${{ inputs.tags }}" | sed 's/,/\n/g' )"
 
         echo "BRANCHES:"
+        echo "-------------------------"
         echo "${BRANCHES}"
+        echo
 
         echo "TAGS:"
+        echo "-------------------------"
         echo "${TAGS}"
+        echo
 
         ###
         ### Get x number of latest tags of this repository (newline separated)
@@ -70,37 +76,52 @@ runs:
         fi
 
         echo "LATEST_TAGS:"
+        echo "-------------------------"
         echo "${LATEST_TAGS}"
-
+        echo
 
         ###
         ### All newline separated refs (and make unique in case of duplicated tags)
         ###
-        REFS="$( printf "%s\n%s\n%s\n" "${BRANCHES}" "${TAGS}" "${LATEST_TAGS}" | grep -Ev '^$' | sort -u )"
+        REFS="$( printf "%s\n%s\n%s\n" "${BRANCHES}" "${TAGS}" "${LATEST_TAGS}" | grep -Ev '^$' || true | sort -u )"
 
         echo "REFS:"
+        echo "-------------------------"
         echo "${REFS}"
+        echo
 
         ###
         ### Create element double-quoted and comma separated string (has leading comma)
         ###
         JSON=''
         while IFS= read -r line; do
-          JSON="${JSON},$( printf '"%s"' "${line}" )"
+          if [ -n "${line}" ]; then
+            JSON="${JSON},$( printf '"%s"' "${line}" )"
+          fi
         done <<< "${REFS}"
 
         ###
         ### Remove leading comma and encapsulate in square brackets
         ###
-        JSON="$( printf '[%s]\n' "${JSON#,}" )"
+        JSON="$( printf '[%s]' "${JSON#,}" )"
 
         ###
         ### Set final output for 'matrix'
         ###
         echo "::set-output name=matrix::${JSON}"
 
+        ###
+        ### Set 'has_refs'
+        ###
+        if [ "${JSON}" = "[]" ]; then
+          HAS_REFS="0"
+        else
+          HAS_REFS="1"
+        fi
+        echo "::set-output name=has_refs::${HAS_REFS}"
+
         ###
         ### Output matrix
         ###
-        echo "JSON=${JSON}"
-        echo JSON=${JSON}
+        echo "matrix=${JSON}"
+        echo "has_refs=${HAS_REFS}"