From a412ec571467609aba433ae568dc856ed7924150 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Fri, 8 Jan 2021 20:27:48 +0100
Subject: [PATCH] meson: fix git ls-files invocations during rebase

Normally ls-files prints the full path to files from the repo root. But when
$GIT_WORK_TREE is set, ls-files prints paths relative to the current
directory. When rebasing, $GIT_WORK_TREE is set in the commands executed from
'rebase -x'. This causes problems if meson config is touched and the meson
reconfigures itself. ($GIT_WORK_TREE shouldn't be relevant, since the paths that
ls-files reports don't depend on the work tree, but whatever.) Let's unset
GIT_WORK_TREE to avoid the issue.

$ (cd test; git --git-dir=$PWD/../.git ls-files ':/test/dmidecode-dumps/*.bin')
test/dmidecode-dumps/HP-Z600.bin
test/dmidecode-dumps/Lenovo-ThinkPad-X280.bin
test/dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin

$ (cd test; GIT_WORK_TREE=$PWD/.. git --git-dir=$PWD/../.git ls-files ':/test/dmidecode-dumps/*.bin')
dmidecode-dumps/HP-Z600.bin
dmidecode-dumps/Lenovo-ThinkPad-X280.bin
dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin

Fixes #18148.
---
 meson.build           | 7 ++++---
 test/fuzz/meson.build | 3 ++-
 test/meson.build      | 1 +
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/meson.build b/meson.build
index 6573046c43..aedde9b94e 100644
--- a/meson.build
+++ b/meson.build
@@ -3651,10 +3651,11 @@ endforeach
 
 if git.found()
         all_files = run_command(
+                'env', '-u', 'GIT_WORK_TREE',
                 git,
-                ['--git-dir=@0@/.git'.format(project_source_root),
-                 'ls-files',
-                 ':/*.[ch]'])
+                '--git-dir=@0@/.git'.format(project_source_root),
+                'ls-files', ':/*.[ch]')
+
         all_files = files(all_files.stdout().split())
 
         custom_target(
diff --git a/test/fuzz/meson.build b/test/fuzz/meson.build
index 7a83961d11..fc8033dbbe 100644
--- a/test/fuzz/meson.build
+++ b/test/fuzz/meson.build
@@ -23,9 +23,10 @@ sanitizers = [['address,undefined', sanitize_address_undefined]]
 
 if git.found()
         out = run_command(
+                'env', '-u', 'GIT_WORK_TREE',
                 git,
                 '--git-dir=@0@/.git'.format(project_source_root),
-                 'ls-files', ':/test/fuzz/*/*')
+                'ls-files', ':/test/fuzz/*/*')
 else
         out = run_command(
                 'sh', '-c', 'ls @0@/test/fuzz/*/*'.format(project_source_root))
diff --git a/test/meson.build b/test/meson.build
index 1e8a56aa90..2785dc92a7 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -142,6 +142,7 @@ if want_tests != 'false' and dmi_arches.contains(host_machine.cpu_family())
 
         if git.found()
                 out = run_command(
+                        'env', '-u', 'GIT_WORK_TREE',
                         git,
                         '--git-dir=@0@/.git'.format(project_source_root),
                         'ls-files', ':/test/dmidecode-dumps/*.bin')