feat: add script to retrieve repositories created from a specific template

gh-cli/README.md

@@ -1234,6 +1234,17 @@ Generates a CSV with 4 columns:
 - url template - The autolink url template
 - autonumeric - If the autolink is autonumeric or not (true/false)
 
+### get-repositories-created-from-template.sh
+
+Gets all repositories in an organization or user account that were created from a specific repository template using GraphQL. Tries the organization endpoint first, then falls back to the user endpoint.
+
+```shell
+./get-repositories-created-from-template.sh joshjohanning-org joshjohanning/nodejs-actions-starter-template
+```
+
+> [!NOTE]
+> The `templateRepository` field is only populated if the template repository still exists and is accessible
+
 ### get-repositories-not-using-actions.sh
 
 Get repositories not using actions, by files committed in the `.github/workflows` directory

gh-cli/get-repositories-created-from-template.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# Gets all repositories in an organization or user account that were created from a specific
+# repository template
+#
+# Note: Uses the GraphQL API to query all repositories in a single paginated call. Tries the
+# organization endpoint first, then falls back to the user endpoint. The templateRepository
+# field is only populated if the template repository still exists and is accessible.
+#
+# Usage:
+#   ./get-repositories-created-from-template.sh <org-or-user> <template-repo-full-name> [hostname]
+#
+# Example:
+#   ./get-repositories-created-from-template.sh joshjohanning-org joshjohanning/nodejs-actions-starter-template
+#   ./get-repositories-created-from-template.sh joshjohanning joshjohanning/nodejs-actions-starter-template
+#   ./get-repositories-created-from-template.sh joshjohanning-org joshjohanning/nodejs-actions-starter-template ghes.example.com
+
+if [ -z "$2" ]; then
+  echo "Usage: $0 <org-or-user> <template-repo-full-name> [hostname]"
+  echo "Example: $0 joshjohanning-org joshjohanning/nodejs-actions-starter-template"
+  exit 1
+fi
+
+org="$1"
+template_repo="$2"
+hostname="${3:-github.com}"
+
+echo "Finding repositories in '$org' created from template '$template_repo'..."
+echo ""
+
+# try organization first, fall back to user
+results=$(gh api graphql --hostname "$hostname" --paginate -F owner="$org" -f query='
+query ($owner: String!, $endCursor: String) {
+  organization(login: $owner) {
+    repositories(first: 100, after: $endCursor) {
+      nodes {
+        nameWithOwner
+        templateRepository {
+          nameWithOwner
+        }
+      }
+      pageInfo {
+        endCursor
+        hasNextPage
+      }
+    }
+  }
+}' --jq "[.data.organization.repositories.nodes[] | select(.templateRepository.nameWithOwner == \"$template_repo\") | .nameWithOwner] | .[]" 2>/dev/null)
+
+if [ $? -ne 0 ] || [ -z "$results" ]; then
+  results=$(gh api graphql --hostname "$hostname" --paginate -F owner="$org" -f query='
+query ($owner: String!, $endCursor: String) {
+  user(login: $owner) {
+    repositories(first: 100, after: $endCursor, ownerAffiliations: OWNER) {
+      nodes {
+        nameWithOwner
+        templateRepository {
+          nameWithOwner
+        }
+      }
+      pageInfo {
+        endCursor
+        hasNextPage
+      }
+    }
+  }
+}' --jq "[.data.user.repositories.nodes[] | select(.templateRepository.nameWithOwner == \"$template_repo\") | .nameWithOwner] | .[]")
+fi
+
+echo "$results"