glib: Add a script to take a snapshot of glib-2.0

Grab a snapshot of a tag from a local glib checkout, remove a bunch of
files and apply some patches. The idea is to make the snapshot of glib
be repeatable.

glib-patches/README

@@ -0,0 +1,15 @@
+To update the glib snapshot, first clone a copy of the glib repo.
+
+	$ git clone git://git.gnome.org/glib
+
+Use the update-glib.sh script to grab a checkout from your local repo.
+
+	$ ./glib-patches/update-glib.sh ../glib
+
+If you've updated to a new glib version, add a new patch (or refresh
+the current patches) in glib-patches, update the default tag value in
+update-glib.sh and commit the changes.
+
+The idea is that all changes are committed and you can build directly
+from the pkg-config repo without manipulating the glib snapshot
+anymore.

glib-patches/update-glib.sh

@@ -0,0 +1,111 @@
+#!/bin/sh
+
+GIT=${GIT-git}
+PATCH=${PATCH-patch}
+SED=${SED-sed}
+repo=
+tag=2.32.0
+commit=n
+
+usage()
+{
+    cat << EOF
+Usage:
+ $0 [OPTIONS] REPO [TAG]
+Fetch archive of TAGged version of glib from local checkout at REPO
+
+Options:
+ -c, --commit       commit snapshot after each change
+ -h, --help         display this help and exit
+
+If TAG is not specified, $tag is used
+EOF
+}
+
+while [ -n "$1" ]; do
+    case "$1" in
+    -c|--commit)
+        commit=y
+        ;;
+    -h|--help)
+        usage
+        exit
+        ;;
+    -*)
+        echo "$0: unrecognized option '$1'" >&2
+        echo "Try '$0 --help' for more information." >&2
+        exit 1
+        ;;
+    *)
+        # end of options
+        break
+        ;;
+    esac
+    shift
+done
+
+repo=$1
+[ -z "$2" ] || tag=$2
+
+# Remove previous snapshot
+if [ -d glib ]; then
+    echo "removing previous glib snapshot"
+    rm -rf glib
+fi
+
+# Create new snapshot
+echo "creating new snapshot of $repo tag $tag"
+(cd "$repo" && $GIT archive --format=tar --prefix=glib/ "$tag") | \
+    tar -xf - || exit $?
+if [ $commit = y ]; then
+    $GIT add glib
+    $GIT commit -q \
+        -m "glib: creating new snapshot of $repo tag $tag" -- glib
+fi
+
+# Prune parts we don't want
+echo "removing unneeded directories and files"
+rm -rf \
+    glib/debian \
+    glib/docs \
+    glib/po \
+    glib/tests \
+    glib/glib/tests \
+    glib/build \
+    glib/gmodule \
+    glib/gthread \
+    glib/gobject \
+    glib/gio \
+    glib/glib/pcre \
+    glib/glib/update-pcre
+rm -f \
+    glib/autogen.sh \
+    glib/INSTALL.in \
+    glib/README.commits \
+    glib/HACKING \
+    glib/NEWS.pre-1-3 \
+    glib/README.win32 \
+    glib/config.h.win32.in \
+    glib/glib-zip.in \
+    glib/sanity_check \
+    glib/glib/glib.stp \
+    glib/glib/glib_probes.d \
+    glib/glib/glibconfig.h.win32.in \
+    glib/msvc_recommended_pragmas.h \
+    glib/win32-fixup.pl
+find glib -name 'makefile.msc*' | xargs rm -f
+find glib -name 'ChangeLog*' | xargs rm -f
+find glib -name '*.pc.in' | xargs rm -f
+[ $commit = y ] && $GIT commit -q \
+    -m "glib: removing unneeded directories and files" -- glib
+
+# Apply patches
+patches=`grep '^[^#]' glib-patches/patchlist 2>/dev/null`
+for p in $patches; do
+    echo "applying patch glib-patches/$p"
+    $PATCH -p1 -i glib-patches/$p || exit $?
+    [ $commit = y ] && $GIT commit -q \
+        -m "glib: applying patch glib-patches/$p" -- glib
+done
+
+echo "snapshot successfully updated"