[libcamera-devel] [PATCH v3 2/2] meson: Add download_subprojects option

[Hirokazu Honda]

This adds download_subprojects option. It controls whether a
library in meson subprojects is downloaded as specified. The
motivation of the option is there is an environment where
the download is prohibited by "--wrap-mode nodownload".
The local library code (e.g. libyuv) is built with in such a
build environment if download_subprojects is set to false.

Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
---
 meson_options.txt       |  5 +++++
 src/android/meson.build | 32 ++++++++++++++++++--------------
 2 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/meson_options.txt b/meson_options.txt
index 53f2675e..bd92475f 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -14,6 +14,11 @@ option('gstreamer',
         value : 'auto',
         description : 'Compile libcamera GStreamer plugin')

+option('download_subprojects',
+        type : 'boolean',
+        value : 'true',
+        description: 'Download subprojects in build')
+
 option('pipelines',
         type : 'array',
         choices : ['ipu3', 'raspberrypi', 'rkisp1', 'simple', 'uvcvideo', 'vimc'],
diff --git a/src/android/meson.build b/src/android/meson.build
index 7619517a..03d847ee 100644
--- a/src/android/meson.build
+++ b/src/android/meson.build
@@ -15,20 +15,24 @@ foreach dep : android_deps
 endforeach

 if android_enabled
-    cmake = import('cmake')
-
-    libyuv_vars = cmake.subproject_options()
-    libyuv_vars.add_cmake_defines({'CMAKE_POSITION_INDEPENDENT_CODE': 'ON'})
-    libyuv_vars.set_override_option('cpp_std', 'c++17')
-    libyuv_vars.append_compile_args('cpp',
-         '-Wno-sign-compare',
-         '-Wno-unused-variable',
-         '-Wno-unused-parameter')
-    libyuv_vars.append_link_args('-ljpeg')
-    libyuv = cmake.subproject('libyuv', options : libyuv_vars)
-    libyuv_dep = libyuv.dependency('yuv')
-
-    android_deps += [ libyuv_dep, ]
+    if get_option('download_subprojects')
+        cmake = import('cmake')
+
+        libyuv_vars = cmake.subproject_options()
+        libyuv_vars.add_cmake_defines({'CMAKE_POSITION_INDEPENDENT_CODE': 'ON'})
+        libyuv_vars.set_override_option('cpp_std', 'c++17')
+        libyuv_vars.append_compile_args('cpp',
+             '-Wno-sign-compare',
+             '-Wno-unused-variable',
+             '-Wno-unused-parameter')
+        libyuv_vars.append_link_args('-ljpeg')
+        libyuv = cmake.subproject('libyuv', options : libyuv_vars)
+        libyuv_dep = libyuv.dependency('yuv')
+
+        android_deps += [ libyuv_dep, ]
+   else
+        android_deps += [ dependency('libyuv') ]
+   endif
 endif

 android_hal_sources = files([
--
2.30.0.365.g02bc693789-goog