libgimp: generate build-only GIR/Typelib variants for macOS.

The previous commit worked for all the compiled executables, but for Python
plug-ins (and likely all other GObject-Introspected bindings), we need to
generate a temporary typelib linking to the in-build-directory libgimp*
libraries.

This is similar to what the script `package/macports_build_app.sh` does for
packaging in gimp-macos-build repository.

libgimp/make-in-build-typelib.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+# macOS-only script to generate temporary .gir and .typelib files only to be
+# used during build, pointing to the non-installed libgimp* libraries.
+# This allows to run non-installed GIMP binaries in a macOS development
+# environment.
+
+gimp_gir="$1"
+gimp_typelib="$2"
+gimpui_gir="$3"
+gimpui_typelib="$4"
+builddir="$5"
+prefix="$6"
+g_ir_compiler="$7"
+
+echo PWD: $PWD
+echo ARGS: "$*"
+
+# This is only for macOS.
+mkdir -p $builddir/tmp/
+cp -f "$gimp_gir" "$gimpui_gir" "$builddir/tmp/"
+cd "$builddir/tmp/"
+gimp_gir=`basename "$gimp_gir"`
+gimpui_gir=`basename "$gimpui_gir"`
+gimp_typelib=`basename "$gimp_typelib"`
+gimpui_typelib=`basename "$gimpui_typelib"`
+
+sed -i '' "s|${prefix}/*||g" "$gimp_gir" "$gimpui_gir"
+sed -i '' "s|@rpath/||g" "$gimp_gir" "$gimpui_gir"
+sed -i '' 's|lib/\(libgimp\(ui\)\?-\([0-9.]*\).dylib\)|libgimp/\1|g; s|lib/\(libgimp\([a-z]*\)-\([0-9.]*\).dylib\)|libgimp\2/\1|g;' "$gimp_gir" "$gimpui_gir"
+$g_ir_compiler --includedir=${prefix}/share/gir-1.0/ --includedir=. "$gimp_gir" -o "${gimp_typelib}"
+$g_ir_compiler --includedir=${prefix}/share/gir-1.0/ --includedir=.  "$gimpui_gir" -o "${gimpui_typelib}"
+
+echo "/* Generated on `date`. */" > $builddir/macos-typelib.stamp

libgimp/meson.build

@@ -521,6 +521,17 @@ else
     install: true,
   )
 
+  if platform_osx
+    g_ir_compiler = find_program('g-ir-compiler')
+    gimp_exe_typelib = custom_target('macos-typelib.stamp',
+                                     output: [ 'macos-typelib.stamp' ],
+                                     command: [
+                                       'make-in-build-typelib.sh', libgimp_gir, libgimpui_gir,
+                                       meson.current_build_dir(), prefix, g_ir_compiler
+                                     ],
+                                     build_by_default: true)
+  endif
+
   if have_vala
     vapi_deps = [
       'babl-0.1',

meson.build

@@ -1846,11 +1846,12 @@ gimp_run_env=environment()
 
 if meson.can_run_host_binaries()
   if enable_console_bin
-    gimp_exe_depends = gimpconsole_exe
+    gimp_real_exe = gimpconsole_exe
   else
-    gimp_exe_depends = gimpmain_exe
+    gimp_real_exe = gimpmain_exe
   endif
-  gimp_run_env.set('GIMP_SELF_IN_BUILD', gimp_exe_depends.full_path())
+  gimp_exe_depends = [gimp_real_exe]
+  gimp_run_env.set('GIMP_SELF_IN_BUILD', gimp_real_exe.full_path())
 
   menu_paths=meson.global_build_root() / 'menus:' + meson.global_source_root() / 'menus'
   gimp_run_env.set('GIMP_TESTING_MENUS_PATH', menu_paths)
@@ -1863,7 +1864,11 @@ if meson.can_run_host_binaries()
   gimp_run_env.set('GIMP_TESTING_ENVIRON_DIRS', meson.global_source_root() / 'data/environ/')
 
   gimp_run_env.prepend('GI_TYPELIB_PATH', prefix / 'lib/girepository-1.0/')
-  gimp_run_env.prepend('GI_TYPELIB_PATH', meson.global_build_root() / 'libgimp')
+  if platform_osx
+    gimp_run_env.prepend('GI_TYPELIB_PATH', meson.global_build_root() / 'libgimp/tmp')
+  else
+    gimp_run_env.prepend('GI_TYPELIB_PATH', meson.global_build_root() / 'libgimp')
+  endif
 
   gimp_run_env.prepend('LD_LIBRARY_PATH', meson.global_build_root() / 'libgimp')
   gimp_run_env.prepend('LD_LIBRARY_PATH', meson.global_build_root() / 'libgimpbase')
@@ -1891,7 +1896,7 @@ if meson.can_run_host_binaries()
 
     gimp_run_env.set('GIMP_GI_DIR', gi.get_variable('libdir'))
 
-    gimp_run_env.set('GIMP_TEMP_UPDATE_RPATH', gimp_exe_depends.full_path())
+    gimp_run_env.set('GIMP_TEMP_UPDATE_RPATH', gimp_real_exe.full_path())
     gimp_run_env.prepend('GIMP_TEMP_UPDATE_RPATH', libgimp.full_path())
     gimp_run_env.prepend('GIMP_TEMP_UPDATE_RPATH', libgimpbase.full_path())
     gimp_run_env.prepend('GIMP_TEMP_UPDATE_RPATH', libgimpcolor.full_path())