[gdk-pixbuf/ebassi/for-master: 5/5] build: Port post-install script to Python

[Emmanuele Bassi <ebassi src gnome org>]

commit 866670e30907eb534895da26626709ed5f2e419d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Apr 7 19:09:25 2021 +0100

    build: Port post-install script to Python
    
    Avoid the whole shell/batch file shenanigans.

 build-aux/post-install.bat | 24 ------------------------
 build-aux/post-install.py  | 26 ++++++++++++++++++++++++++
 build-aux/post-install.sh  | 18 ------------------
 meson.build                | 19 +++++--------------
 4 files changed, 31 insertions(+), 56 deletions(-)
---
diff --git a/build-aux/post-install.py b/build-aux/post-install.py
new file mode 100644
index 000000000..d532ddf73
--- /dev/null
+++ b/build-aux/post-install.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+import subprocess
+
+if 'DESTDIR' not in os.environ:
+    bindir = sys.argv[1]
+    libdir = sys.argv[2]
+    binary_version = sys.argv[3]
+
+    query_loaders = os.path.join(bindir, "gdk-pixbuf-query-loaders")
+    loaders_dir = os.path.join(libdir, "gdk-pixbuf-2.0", binary_version)
+    loaders_cache = os.path.join(loaders_dir, "loaders.cache")
+
+    os.makedirs(loaders_dir, exist_ok=True)
+
+    cmd = [query_loaders]
+    with subprocess.Popen(cmd, stdout=subprocess.PIPE, close_fds=True) as p:
+        data = p.stdout.read()
+
+    with open(loaders_cache, "wb") as f:
+        f.write(data)
+else:
+    print("*** Warning: loaders.cache not built because DESTDIR is set")
+    print("***          You will need to manually call gdk-pixbuf-query-loaders")
diff --git a/meson.build b/meson.build
index 286f17c2d..b84d804c7 100644
--- a/meson.build
+++ b/meson.build
@@ -419,20 +419,11 @@ build_docs = get_option('gtk_doc') or get_option('docs')
 subdir('docs')
 
 if not meson.is_cross_build()
-  # On Visual Studio, we don't normally have a shell interpreter, so use a .bat
-  if cc.get_id() == 'msvc'
-    meson.add_install_script('build-aux/post-install.bat',
-      gdk_pixbuf_bindir,
-      gdk_pixbuf_libdir,
-      gdk_pixbuf_binary_version,
-    )
-  else
-    meson.add_install_script('build-aux/post-install.sh',
-      gdk_pixbuf_bindir,
-      gdk_pixbuf_libdir,
-      gdk_pixbuf_binary_version,
-    )
-  endif
+  meson.add_install_script('build-aux/post-install.py',
+    gdk_pixbuf_bindir,
+    gdk_pixbuf_libdir,
+    gdk_pixbuf_binary_version,
+  )
 endif
 
 if not meson.is_subproject()