Install ScanCode.io from the GitHub repository (#14)

Signed-off-by: tdruez <[email protected]>

Author: tdruez

README.md

@@ -22,6 +22,7 @@ Workflows.
   - [Provide download URLs inputs](#provide-download-urls-inputs)
   - [Fetch pipelines inputs](#fetch-pipelines-inputs)
   - [Define a custom project name](#define-a-custom-project-name)
+  - [Install ScanCode.io from a repository branch](#install-scancodeio-from-a-repository-branch)
 - [Where does the scan results go?](#where-does-the-scan-results-go)
 
 ## Usage
@@ -159,6 +160,14 @@ For details on setting up and configuring your own instance, please refer to the
     project-name: "my-project-name"
 ```
 
+### Install ScanCode.io from a repository branch
+
+```yaml
+- uses: nexB/scancode-action@alpha
+  with:
+    scancodeio-repo-branch: "main"
+```
+
 ## Where are the Scan Results?
 
 Upon completion of the workflow, you can **find the scan results** in the dedicated 

action.yml

@@ -23,6 +23,10 @@ inputs:
   python-version:
     description: "Python version"
     default: "3.11"
+  scancodeio-repo-branch:
+    description: "Branch to install ScanCode.io from the GitHub repository (optional)"
+    required: false
+    default: ""
 
 runs:
   using: "composite"
@@ -50,8 +54,17 @@ runs:
     - name: Install ScanCode.io
       shell: bash
       run: |
-        pip install --upgrade scancodeio
-        scanpipe migrate
+        if [ -z "${{ inputs.scancodeio-repo-branch }}" ]; then
+          echo "Installing the latest ScanCode.io release from PyPI"
+          pip install --upgrade scancodeio
+        else
+          echo "Installing ScanCode.io from the GitHub branch: ${{ inputs.scancodeio-repo-branch }}"
+          pip install git+https://github.com/aboutcode-org/scancode.io.git@${{ inputs.scancodeio-repo-branch }}
+        fi
+
+    - name: Run migrations to prepare the database
+      shell: bash
+      run: scanpipe migrate
 
     - name: Generate `--pipeline` CLI arguments
       shell: bash