Add support for arbitrary base URL to fix #9.

.github/workflows/ci.yml

@@ -15,6 +15,8 @@ jobs:
         include:
           - webotsVersion: R2024a
             webotsTag: nightly_26_7_2024
+          - webotsVersion: R2024a
+            webotsBaseUrl: https://github.com/DeepBlueRobotics/webots/releases/download/R2024a_DeepBlueSim_2024_07_28
     runs-on: ${{ matrix.os }}
 
     steps:

README.md

@@ -14,7 +14,7 @@ This GitHub action can be used in a [GitHub workflow](https://docs.github.com/en
       shell: bash
 ```
 
-Alternatively, the `webotsTag` option can be used to install a specific tag from the Webots repository (such as a nightly build).
+Alternatively, the `webotsTag` option can be used to install a specific tag from the official Webots repository (such as a nightly build).
 
 ``` YAML
     - name: Setup Webots
@@ -29,6 +29,23 @@ Alternatively, the `webotsTag` option can be used to install a specific tag from
       shell: bash
 ```
 
+Alternatively, the `webotsBaseUrl` option can be used to install from an arbitrary location (such as
+a fork of the official repo). Note that if you use the `webotsBaseUrl` option, the `webotsTag`
+option will be ignored, so the URL should contain any needed tag information.
+
+``` YAML
+    - name: Setup Webots
+      id: setupWebots
+      uses: DeepBlueRobotics/setup-webots@main
+      with:
+        webotsVersion: R2024a # Set this to your Webots version
+        webotsBaseUrl: https://github.com/DeepBlueRobotics/webots/releases/download/R2024a_DeepBlueSim_2024_07_28
+
+    - name: Run Webots
+      run: $RUN_WEBOTS /path/to/worlds/MyWorld.wbt
+      shell: bash
+```
+
 In a step that uses the `bash` shell, `$RUN_WEBOTS` will expand to the start of a command line that will start Webots on any of the aforementioned runners with the `--no-rendering --stdout --stderr --minimize --batch` options. Those options allow Webots to run in a headless environment and redirect the controller's output/error to stdout/stderr.
 
 Note:

action.yml

@@ -8,6 +8,10 @@ inputs:
     description: "Optionally specify a specific tag from the Webots repository to install. (Defaults to webotsVersion)"
     required: false
     default: ''
+  webotsBaseUrl:
+    description: "Optionally specify a base URL containing the distribution files (Defaults to https://github.com/cyberbotics/webots/releases/download/<webotsTag>)"
+    required: false
+    default: ''
 
 outputs:
   bashCmd:
@@ -41,6 +45,14 @@ runs:
         else
           webotsTag=${{ inputs.webotsVersion }}
         fi
+        if [ -n '${{ inputs.webotsBaseUrl }}' ]; then
+          if [ -n '${{ inputs.webotsTag }}' ]; then
+            echo "WARNING: Ignoring webotsTag=${{ inputs.webotsTag }} because webotsBaseUrl was specified."
+          fi
+          webotsBaseUrl=${{ inputs.webotsBaseUrl }}
+        else
+          webotsBaseUrl='https://github.com/cyberbotics/webots/releases/download/${{ inputs.webotsTag }}'
+        fi
         if [ '${{ runner.os }}' = 'Linux' ]; then
           webotsCachePath="$HOME/cache/webots"
           webotsHome="$HOME/webots"
@@ -73,7 +85,7 @@ runs:
         echo "binDir=${webotsBinDir}" >> $GITHUB_OUTPUT
         echo "bin=${webotsBin}" >> $GITHUB_OUTPUT
         echo "pkgName=$pkgName" >> $GITHUB_OUTPUT
-        echo "tag=$webotsTag" >> $GITHUB_OUTPUT
+        echo "baseUrl=$webotsBaseUrl" >> $GITHUB_OUTPUT
         echo "RUN_WEBOTS=$webotsBashCmd" >> $GITHUB_ENV
         echo "LIBGL_ALWAYS_SOFTWARE=true" >> $GITHUB_ENV
         echo "WEBOTS_DISABLE_SAVE_SCREEN_PERSPECTIVE_ON_CLOSE=true" >> $GITHUB_ENV
@@ -83,12 +95,12 @@ runs:
       id: cache
       with:
         path: ${{ steps.setup.outputs.cachePath }}
-        key: ${{ runner.os }}-webots-${{ steps.setup.outputs.tag }}
+        key: ${{ runner.os }}-webots-${{ steps.setup.outputs.baseUrl }}
         save-always: true
     - name: 'Download Webots'
       if: steps.cache.outputs.cache-hit != 'true'
       run: |
-        curl -L -o "${{ steps.setup.outputs.cachePath }}/${{ steps.setup.outputs.pkgName }}" --create-dirs "https://github.com/cyberbotics/webots/releases/download/${{ steps.setup.outputs.tag }}/${{ steps.setup.outputs.pkgName }}"
+        curl -L -o "${{ steps.setup.outputs.cachePath }}/${{ steps.setup.outputs.pkgName }}" --create-dirs "${{ steps.setup.outputs.baseUrl }}/${{ steps.setup.outputs.pkgName }}"
         if [ '${{ runner.os }}' = 'Windows' ]; then
           curl -L -o "${{ steps.setup.outputs.cachePath }}/Mesa.7z" --create-dirs https://downloads.fdossena.com/geth.php?r=mesa64-latest
         fi