feat: add stages in image generation

fix: #2

generate_gitlabci.py

@@ -2,6 +2,7 @@
 
 TEMPLATE = '''
 build_{project}{tag}:
+  stage: {stage}
   image:
     name: gcr.io/kaniko-project/executor:debug
     entrypoint: [""]
@@ -24,4 +25,11 @@
     "python-logilab": ["3.9", "3.11", "latest"],
 }
 
+STAGE_2_PROJECTS = {
+    "bullseye-slim-pg13-crm",
+    "bullseye-slim-pg13-firefox",
+    "bullseye-slim-pg13-ldap",
+    "bookworm-slim-pg15-ldap"
+}
+
 with open('gitlab-ci-generated.yml', 'w') as f:
@@ -27,4 +35,11 @@
 with open('gitlab-ci-generated.yml', 'w') as f:
+    f.write(
+        """
+stages:
+  - stage1
+  - stage2
+        """
+    )
     for filepath in sorted(glob.glob('library/**/Dockerfile', recursive=True)):
         project = '-'.join(filepath.split('/')[1:-1])
         context = filepath.replace('/Dockerfile', '')
@@ -34,5 +49,6 @@
                 context=context,
                 filepath=filepath,
                 version=version,
-                tag="" if version == "latest" else f"_{version}"
+                tag="" if version == "latest" else f"_{version}",
+                stage="stage2" if project in STAGE_2_PROJECTS else "stage1",
             ))