Refactor inc_release script to allow reusing parts of it

No real changes, just extract the useful helpers from this script into
another file.

misc/scripts/inc_release

@@ -8,52 +8,7 @@
 # Licence:    wxWindows licence
 ##############################################################################
 
-error() {
+. `dirname $0`/run_sed_common.sh
-    echo "$progname: $*" >&2
-}
-
-msg() {
-    echo "$progname: $*"
-}
-
-msgn() {
-    echo -n "$progname: $*"
-}
-
-msgc() {
-    echo "$*"
-}
-
-run_sed() {
-    filename=$1
-    shift
-    cmd=
-    while [ $# -gt 0 ]; do
-        cmd="$cmd-e \"$1\" "
-        shift
-    done
-
-    msgn "	processing $filename ...	"
-    eval "sed $cmd $filename" > $filename.$$
-    if cmp -s $filename $filename.$$; then
-        rm $filename.$$
-        msgc "unchanged"
-    else
-        mv $filename.$$ $filename
-        msgc "done"
-    fi
-}
-
-progname=`basename $0`
-
-# we must be run from wx directory
-if [ ! -f wxwin.m4 ]; then
-    error "must be ran from root wx directory"
-    exit 1
-fi
-
-# exit on any error
-set -e
 
 # the primary source of information is wx/version.h
 ver_string=`grep '#define wxVERSION_STRING ' include/wx/version.h | sed 's/^.*"wxWidgets \(.*\)")/\1/'`

misc/scripts/run_sed_common.sh

@@ -0,0 +1,54 @@
+##############################################################################
+# Name:       misc/scripts/run_sed_common.sh
+# Purpose:    Common helpers for scripts using sed for automatic updates
+# Created:    2019-04-21 (extracted from misc/scripts/inc_release)
+# Copyright:  (c) 2007,2019 Vadim Zeitlin <vadim@wxwindows.org>
+# Licence:    wxWindows licence
+##############################################################################
+
+error() {
+    echo "$progname: $*" >&2
+}
+
+msg() {
+    echo "$progname: $*"
+}
+
+msgn() {
+    echo -n "$progname: $*"
+}
+
+msgc() {
+    echo "$*"
+}
+
+run_sed() {
+    filename=$1
+    shift
+    cmd=
+    while [ $# -gt 0 ]; do
+        cmd="$cmd-e \"$1\" "
+        shift
+    done
+
+    msgn "	processing $filename ...	"
+    eval "sed $cmd $filename" > $filename.$$
+    if cmp -s $filename $filename.$$; then
+        rm $filename.$$
+        msgc "unchanged"
+    else
+        mv $filename.$$ $filename
+        msgc "done"
+    fi
+}
+
+progname=`basename $0`
+
+# we must be run from wx directory
+if [ ! -f wxwin.m4 ]; then
+    error "must be ran from root wx directory"
+    exit 1
+fi
+
+# exit on any error
+set -e