Parse the event.json of an action (e.g. push)

win/parse-event/action.yml

@@ -0,0 +1,31 @@
+name: 'parse-event'
+description: 'Parses a JSON file, that contains all information about the last event.'
+
+outputs:
+  base-commit:
+    description: 'The hash of the base commit of the event. This is the commit that was previously at the head of the branch before the event.'
+    value: ${{ steps.parse.outputs.hash }}
+  fetch-depth:
+    description: 'The number of commits needed to get the whole diff of the event.'
+    value: ${{ steps.parse.outputs.count }}
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Parse event
+      id: parse
+      shell: powershell
+      run: |
+        chcp 65001 > $null
+        $event = Get-Content "${{ github.event_path }}" | ConvertFrom-Json
+        $serverUrl = "${{ github.server_url }}"
+        $host = $serverUrl -replace '.*://', ''
+
+        Write-Output "OUT: hash=$($event.before)"
+        Write-Output "hash=$($event.before)" | Add-Content -Path $env:GITHUB_OUTPUT
+
+        Write-Output "OUT: count=$($event.commits.Count + 1)"
+        Write-Output "count=$($event.commits.Count + 1)" | Add-Content -Path $env:GITHUB_OUTPUT
+
+        Write-Output "ENV: CI_SERVER_HOST=$host"
+        Write-Output "CI_SERVER_HOST=$host" | Add-Content -Path $env:GITHUB_ENV