From 32d511684ea52e1c6e15495ec080281be3dd24b8 Mon Sep 17 00:00:00 2001
From: Guillaume Desmottes <guillaume.desmottes@collabora.com>
Date: Thu, 26 Nov 2020 16:50:04 +0100
Subject: [PATCH] meson: install plugins pc files

---
 cargo_wrapper.py | 25 +++++++++++++++++++++----
 meson.build      | 26 +++++++++++++++++++++++++-
 2 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/cargo_wrapper.py b/cargo_wrapper.py
index 4a7d79b4..06bbde90 100644
--- a/cargo_wrapper.py
+++ b/cargo_wrapper.py
@@ -9,8 +9,8 @@ import sys
 
 PLUGIN_DIRS = ['audio', 'generic', 'net', 'text', 'utils', 'video']
 
-command, meson_build_dir, meson_current_source_dir, meson_build_root, target, exclude, extra_env = sys.argv[
-    1:8]
+command, meson_build_dir, meson_current_source_dir, meson_build_root, target, exclude, extra_env, prefix, libdir = sys.argv[
+    1:10]
 
 cargo_target_dir = os.path.join(meson_build_dir, 'target')
 
@@ -28,10 +28,10 @@ if len(extra_env) > 0:
 
 if command == 'build':
     # cargo build
-    ext = sys.argv[8]
+    ext = sys.argv[10]
     # when using --default-library=both 2 extensions are passed
     try:
-        ext2 = sys.argv[9]
+        ext2 = sys.argv[11]
     except IndexError:
         ext2 = None
 
@@ -46,6 +46,9 @@ else:
     print("Unknown command:", command)
     sys.exit(1)
 
+cargo_cmd.extend(['--prefix', prefix, '--libdir',
+                  os.path.join(prefix, libdir)])
+
 
 def run(cargo_cmd, env):
     try:
@@ -71,3 +74,17 @@ if command == 'build':
     if ext2:
         for f in glob.glob(os.path.join(cargo_target_dir, target, '*.' + ext2)):
             shutil.copy(f, meson_build_dir)
+    # Copy generated pkg-config files
+    for f in glob.glob(os.path.join(cargo_target_dir, target, '*.pc')):
+        shutil.copy(f, meson_build_dir)
+
+    # Move -uninstalled.pc to meson-uninstalled
+    uninstalled = os.path.join(meson_build_dir, 'meson-uninstalled')
+    if not os.path.exists(uninstalled):
+        os.mkdir(uninstalled)
+    for f in glob.glob(os.path.join(meson_build_dir, '*-uninstalled.pc')):
+        # move() does not allow us to update the file so remove it if it already exists
+        dest = os.path.join(uninstalled, os.path.basename(f))
+        if os.path.exists(dest):
+            os.unlink(dest)
+        shutil.move(f, uninstalled)
diff --git a/meson.build b/meson.build
index 006a29f5..088dcd39 100644
--- a/meson.build
+++ b/meson.build
@@ -106,6 +106,12 @@ if get_option('default_library') == 'static' or get_option('default_library') ==
   endforeach
 endif
 
+pc_files = []
+foreach p, lib : plugins_rep
+  # skip the 'lib' prefix in plugin name
+  pc_files += [lib.substring(3) + '.pc']
+endforeach
+
 # Need to depends on all gstreamer-rs deps to ensure they are built
 # before gstreamer-rs when building with gst-build.
 # Custom targets can't depend on dependency() objects so we have to depend
@@ -144,6 +150,7 @@ endforeach
 extra_env_str = ','.join(extra_env_list)
 
 plugins_install_dir = get_option('libdir') / 'gstreamer-1.0'
+pkgconfig_install_dir = get_option('libdir') / 'pkgconfig'
 
 # Always build the target so we don't have to list all source files as input
 rs_plugins = custom_target('gst-plugins-rs',
@@ -162,10 +169,25 @@ rs_plugins = custom_target('gst-plugins-rs',
     target,
     exclude,
     extra_env_str,
+    get_option('prefix'),
+    get_option('libdir'),
     extensions])
 
 plugins = rs_plugins.to_list()
 
+# We don't need to pass a command as we depends on the target above
+# but it is currently mandatory ( https://github.com/mesonbuild/meson/issues/8059 )
+# so use python as it's guaranteed to be present on any setup
+python = import('python').find_installation()
+custom_target('gst-plugins-rs-pc-files',
+  build_by_default: true,
+  output: pc_files,
+  console: true,
+  install: true,
+  install_dir: pkgconfig_install_dir,
+  depends: rs_plugins,
+  command: [python, '-c', '""'])
+
 test('tests',
   cargo_wrapper,
   args: ['test',
@@ -174,5 +196,7 @@ test('tests',
     meson.build_root(),
     target,
     exclude,
-    extra_env_str],
+    extra_env_str,
+    get_option('prefix'),
+    get_option('libdir')],
   timeout: 600)