gdk-pixbuf: updating loader cache in post install

Closes #28782.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

1 files changed, 21 insertions, 7 deletions

diff --git a/Library/Formula/gdk-pixbuf.rb b/Library/Formula/gdk-pixbuf.rb
index e0d46a369..a37aca02f 100644
--- a/Library/Formula/gdk-pixbuf.rb
+++ b/Library/Formula/gdk-pixbuf.rb
@@ -13,12 +13,12 @@ class GdkPixbuf < Formula
 
   option :universal
 
-  depends_on 'pkg-config' => :build
-  depends_on 'glib'
-  depends_on 'jpeg'
-  depends_on 'libtiff'
-  depends_on 'libpng'
-  depends_on 'gobject-introspection'
+  depends_on "pkg-config" => :build
+  depends_on "glib"
+  depends_on "jpeg"
+  depends_on "libtiff"
+  depends_on "libpng"
+  depends_on "gobject-introspection"
 
   # 'loaders.cache' must be writable by other packages
   skip_clean 'lib/gdk-pixbuf-2.0'
@@ -33,7 +33,7 @@ class GdkPixbuf < Formula
                           "--disable-Bsymbolic",
                           "--without-gdiplus"
     system "make"
-    system "make install"
+    system "make", "install"
 
     # Other packages should use the top-level modules directory
     # rather than dumping their files into the gdk-pixbuf keg.
@@ -43,4 +43,18 @@ class GdkPixbuf < Formula
         HOMEBREW_PREFIX/'lib/gdk-pixbuf-2.0'/libv
     end
   end
+
+  def post_install
+    # Change the version directory below with any future update
+    ENV["GDK_PIXBUF_MODULEDIR"]="#{HOMEBREW_PREFIX}/lib/gdk-pixbuf-2.0/2.10.0/loaders"
+    system "#{bin}/gdk-pixbuf-query-loaders", "--update-cache"
+  end
+
+  def caveats; <<-EOS.undent
+    Programs that require this module need to set the environment variable
+      export GDK_PIXBUF_MODULEDIR="#{HOMEBREW_PREFIX}/lib/gdk-pixbuf-2.0/2.10.0/loaders"
+    If you need to manually update the query loader cache
+      #{bin}/gdk-pixbuf-query-loaders --update-cache
+    EOS
+  end
 end