feat: add option to perform a dry run sync

README.md

@@ -117,3 +117,7 @@ Each Collection will exist as a subdirectory in the directory specified by `coll
 
 > [!NOTE]
 > If a Card that was previously published to GitHub becomes unverified, the corresponding Markdown file will not be deleted. However, it will not be updated until the Card is verified.
+
+### `DRY_RUN`
+
+**Optional:** If truthy, the action will run without publishing any Guru Cards. This can be useful for testing.

action.yml

@@ -48,14 +48,17 @@ runs:
         GURU_COLLECTION_ID: ${{ inputs.guru_collection_id }}
         COLLECTION_DIRECTORY_PATH: ${{ inputs.collection_directory_path }}
     - name: Pull changes from sync so we can update the metadata file
+      if: ${{ !env.DRY_RUN }}
       shell: bash
       run: git pull
     - uses: stefanzweifel/git-auto-commit-action@8756aa072ef5b4a080af5dc8fef36c5d586e521d # v5.0.0
+      if: ${{ !env.DRY_RUN }}
       with:
         file_pattern: "${{ inputs.collection_directory_path }}/**/resources/*"
         commit_message: "Update resources"
         commit_author: "github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
     - uses: stefanzweifel/git-auto-commit-action@8756aa072ef5b4a080af5dc8fef36c5d586e521d # v5.0.0
+      if: ${{ !env.DRY_RUN }}
       with:
         file_pattern: "${{ inputs.collection_directory_path }}/GitHubPublisher.json"
         commit_message: "Update GitHubPublisher.json"

github_publisher.py

@@ -24,9 +24,10 @@ class GitHubPublisher(guru.PublisherFolders):
 
     def __init__(self, source):
         super().__init__(source)
-        # self.dry_run = True
         if environ.get("PUBLISH_UNVERIFIED_CARDS"):
             self.skip_unverified_cards = False
+        if environ.get("DRY_RUN"):
+            self.dry_run = True
 
     def get_headers(self, media_type="application/vnd.github+json"):
         """