fix: support macos on shell script

.github/workflows/slugify.yaml

@@ -1,8 +1,12 @@
 name: Slugify testing
 on: [push]
 jobs:
-  slugify:
-    runs-on: ubuntu-latest
+  slugify-on-os:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -21,6 +25,7 @@ jobs:
           [[ "${{ env.KEY_TEST_SLUG_CS }}" == "Key_Test.values" ]]
           [[ "${{ env.KEY_TEST_SLUG_URL }}" == "key_test-values" ]]
           [[ "${{ env.KEY_TEST_SLUG_URL_CS }}" == "Key_Test-values" ]]
+        shell: bash
 
       # Test 2
       - name: Slugify key/value
@@ -35,7 +40,16 @@ jobs:
           [[ "${{ env.KEY_VALUE_TEST_SLUG_CS }}" == "feat-Some-Changes_to.be" ]]
           [[ "${{ env.KEY_VALUE_TEST_SLUG_URL }}" == "feat-some-changes_to-be" ]]
           [[ "${{ env.KEY_VALUE_TEST_SLUG_URL_CS }}" == "feat-Some-Changes_to-be" ]]
+        shell: bash
+
+  slugify-release:
+    runs-on: ubuntu-latest
+    needs: slugify-on-os
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
 
       # Release
       - name: Release this GitHub Action
         uses: rlespinasse/release-that@v1.x
+    

action.yml

@@ -1,4 +1,4 @@
-name: "Slugify"
+name: "Slugify Value"
 description: "Github Action to slugify a value"
 author: "Romain Lespinasse"
 inputs:
@@ -14,7 +14,7 @@ branding:
 runs:
   using: "composite"
   steps:
-    - run: ${{ github.action_path }}/slugify.sh
+    - run: $GITHUB_ACTION_PATH/slugify.sh
       shell: bash
       env:
         INPUT_KEY: ${{ inputs.key }}

slugify.sh

@@ -1,18 +1,26 @@
 #!/usr/bin/env bash
 
-KEY=${INPUT_KEY^^}
-CS_VALUE=${INPUT_VALUE:-${!INPUT_KEY}}
-VALUE=${CS_VALUE,,}
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  # On MacOS,
+  # bash don't support substitution, so we use 'tr'
+  KEY=$(echo "$INPUT_KEY" | tr '[:lower:]' '[:upper:]')
+  CS_VALUE=${INPUT_VALUE:-${!INPUT_KEY}}
+  VALUE=$(echo "$CS_VALUE" | tr '[:upper:]' '[:lower:]')
+else
+  KEY=${INPUT_KEY^^}
+  CS_VALUE=${INPUT_VALUE:-${!INPUT_KEY}}
+  VALUE=${CS_VALUE,,}
+fi
 
 slug() {
   echo "$1" |
-    sed -r 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._]+/-/g;s/^-*//;s/-*$//' |
+    sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' |
     cut -c1-63
 }
 
 slug_url() {
   echo "$1" |
-    sed -r 's#refs/[^\/]*/##;s/[^a-zA-Z0-9_]+/-/g;s/^-//;s/-$//' |
+    sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9_]+/-/g;s/-+/-/g;s/^-*//;s/-*$//' |
     cut -c1-63
 }