From e2c6603cb5daff2798893cbe7714253fc5780c03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20K=C4=99pie=C5=84?= <michal@isc.org>
Date: Wed, 30 Jul 2025 17:37:38 +0200
Subject: [PATCH] Check meson.build formatting in CI

Add a new CI job that checks whether all meson.build files in the
repository are formatted in the exact same way as "muon fmt" would
format them.  This enforces formatting consistency across all
meson.build files in the repository and enables updating their contents
using dedicated tools, e.g. "meson rewrite".
---
 .gitlab-ci.yml | 23 +++++++++++++++++++++++
 meson.build    |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9635893d82..d58881c824 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -615,6 +615,29 @@ coccinelle:
     - util/check-cocci
     - if test "$(git status --porcelain | grep -Ev '\?\?' | wc -l)" -gt "0"; then git status --short; exit 1; fi
 
+meson-format:
+  ######################################################################
+  # Revert to using the "precheck_job" anchor after the "base" image is
+  # upgraded to Debian trixie, which has muon 0.4.0.
+  <<: *default_triggering_rules
+  <<: *debian_sid_amd64_image
+  stage: precheck
+  ######################################################################
+  needs: []
+  script:
+    - git ls-files "*meson.build" | xargs muon-meson fmt -i
+    - git diff > meson-format.patch
+    - if test "$(git status --porcelain | grep -Ev '\?\?' | wc -l)" -gt "0"; then git status --short; exit 1; fi
+  artifacts:
+    paths:
+      - meson-format.patch
+    expire_in: "1 week"
+    when: on_failure
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+      changes:
+        - "**/meson.build"
+
 doctest:
   <<: *precheck_job
   needs: []
diff --git a/meson.build b/meson.build
index c4316aa05d..c6859dec47 100644
--- a/meson.build
+++ b/meson.build
@@ -1650,7 +1650,7 @@ print(release_date, end="")
 if doc_opt.allowed()
     release_date = ''
     if python.found()
-      release_date = run_command(python, ['-c', get_release_date], check: true).stdout()
+        release_date = run_command(python, ['-c', get_release_date], check: true).stdout()
     endif
 
     man_srcconf = man_srcset.apply(config, strict: false)