Merge pull request 'inject file directly' (#107) from feature/artifact-update into main

Reviewed-on: #107

.github/workflows/flake-update.yml

@@ -51,7 +51,7 @@ jobs:
               id: upload-diff
               uses: actions/upload-artifact@v3
               with:
-                name: nix flake diff
+                name: nix-flake-diff.log
                 path: post-diff
                 compression-level: 9
                 if-no-files-found: error
@@ -63,12 +63,17 @@ jobs:
                 contents: |
                   - The following Nix Flake inputs were updated:
 
-                    ```
+                  Flake input changes:
+
+                  ```shell
                   ${{ env.UPDATE_LOG }}
                   ```
 
-                    Flake Diff can be found here:
-                    ${{ steps.upload-diff.outputs.artifact-url }}
+                  Flake evaluation diff:
+
+                  ```shell
+                  nix-diff-placeholder
+                  ```
 
                   Auto-generated by [update.yml][1] with the help of
                   [create-pull-request][2].
@@ -80,6 +85,9 @@ jobs:
               with:
                 files: "pr_body.template"
                 output-filename: "pr_body.md"
+            - name: template diff into PR body
+              run: |
+                nix utils/inject-diff.py
             - name: Save PR body
               id: pr_body
               uses: juliangruber/read-file-action@v1

utils/inject-diff.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env nix
+#! nix shell nixpkgs#python3  --command python
+import logging
+
+def inject_diff():
+    source_file = 'post-diff'
+    target_file = 'pr_body.md'
+    placeholder = "nix-diff-placeholder"
+
+    logging.info(f"injecting '{source_file}' into '{target_file}' using '{placeholder}' as a placeholder")
+
+    out = []
+    with open(source_file,'r') as src:
+        src_content = src.read()
+    with open(target_file,'r') as tgt:
+        for line in tgt.readlines():
+            if placeholder in line:
+                out.append(line.replace(placeholder,src_content))
+            else:
+                out.append(line)
+    logging.info(out)
+
+    with open(target_file,'w') as tgt:
+        tgt.writelines(out)
+
+
+
+
+if __name__ == "__main__":
+    logging.basicConfig( level=logging.INFO)
+    inject_diff()