From d1ddfe37aa52dd37eeb405e99d16e3094baf156c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20M=C3=BCller?= <webmaster@am-wd.de>
Date: Thu, 9 Apr 2026 20:28:39 +0200
Subject: [PATCH] Parse the event.json of an action (e.g. push)

---
 lnx/parse-event/action.yml | 38 ++++++++++++++++++++++++++++++++++++++
 win/parse-event/action.yml | 31 +++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 lnx/parse-event/action.yml
 create mode 100644 win/parse-event/action.yml

diff --git a/lnx/parse-event/action.yml b/lnx/parse-event/action.yml
new file mode 100644
index 0000000..912b7c2
--- /dev/null
+++ b/lnx/parse-event/action.yml
@@ -0,0 +1,38 @@
+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: ${{ steps.parse.outputs.count }}
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Install jq
+      shell: bash
+      run: |
+        apt-get update &> /dev/null
+        apt-get install -y jq &> /dev/null
+        echo "$(which jq): $(jq --version)"
+
+    - name: Parse event
+      id: parse
+      shell: bash
+      run: |
+        hash=$(jq -r '.before' "${{ github.event_path }}")
+        count=$(jq -r '.commits | length + 1' "${{ github.event_path }}")
+        serverUrl="${{ github.server_url }}"
+        host=${serverUrl#*://}
+
+        echo "OUT: hash=$hash"
+        echo "hash=$hash" >> $GITHUB_OUTPUT
+
+        echo "OUT: count=$count"
+        echo "count=$count" >> $GITHUB_OUTPUT
+
+        echo "ENV: CI_SERVER_HOST=$host"
+        echo "CI_SERVER_HOST=$host" >> $GITHUB_ENV
\ No newline at end of file
diff --git a/win/parse-event/action.yml b/win/parse-event/action.yml
new file mode 100644
index 0000000..716835e
--- /dev/null
+++ b/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
\ No newline at end of file