Add option to fetch webrtc based on signal version

.forgejo/workflows/generate-webrtc.yml

@@ -1,9 +1,13 @@
 on:
   workflow_dispatch:
     inputs:
-      ref_name:
+      signalver:
+        description: 'signal tag or commit'
+        required: false
+        type: string
+      webrtcver:
         description: 'webrtc version'
-        required: true
+        required: false
         type: string
 
   push:
@@ -32,17 +36,28 @@ jobs:
           git checkout $DEPOT_TOOLS_VER
       - name: Getting variables
         run: |
-          echo $GITHUB_REF_NAME
           if test $GITHUB_REF_NAME == "ci" ; then
-            echo ${{ inputs.ref_name }} > webrtcver
+            _signalver=${{ inputs.signalver }} 
+            _webrtcver=${{ inputs.webrtcver }} 
           else
-            curl --silent https://raw.githubusercontent.com/signalapp/Signal-Desktop/$GITHUB_REF_NAME/package-lock.json | grep "@signalapp/ringrtc\": \"" | awk '{print $2}' | tr -d ',' | tr -d '"' | head -n 1 > ringrtcver
+            _signalver=$GITHUB_REF_NAME
+          fi
+          if [ -n "$_webrtcver" ]; then
+            echo "webrtcver set manually with $_webrtcver"
+            echo $_webrtcver > webrtcver
+          elif [ -z "$_signalver" ]; then
+            echo "When Signal commit" is unset, webrtc commit needs be set
+            return 1
+          else
+            echo "Fetching webrtcver for Signal version $_signalver"
+            curl --silent https://raw.githubusercontent.com/signalapp/Signal-Desktop/$_signalver/package-lock.json | grep "@signalapp/ringrtc\": \"" | awk '{print $2}' | tr -d ',' | tr -d '"' | head -n 1 > ringrtcver
             read _ringrtcver < ringrtcver
             curl --silent https://raw.githubusercontent.com/signalapp/ringrtc/v$_ringrtcver/config/version.properties | awk -F '=' '{if($1 == "webrtc.version"){print $2}}' | head -n 1 > webrtcver
           fi
       - name: Fetching webrtc
         run: |
           read  _webrtcver < webrtcver
+          echo "Fetching webrtc $_webrtcver"
           echo "solutions = [{'name': 'src','url': 'https://github.com/signalapp/webrtc.git@$_webrtcver',}]" > .gclient
           echo "target_cpu = ['x64', 'arm64']" >> .gclient
           echo "target_cpu_only = True" >> .gclient