[OpenWrt-Devel] [PATCH] scripts: add a new patch-rename.sh script

[Mathieu Olivari]

During quilt based development, it is sometimes necessary to reorder
patch files, which can become a tedious process as the patch list gets
bigger. This script can help when doing such operations, by allowing to
increment or decrement the number of multiple patch files at once:

$ ./scripts/patch-rename.sh -i 5 target/linux/generic/1*
Add 5 to all the prefix numbers of all the patch files specified as an
argument.

Signed-off-by: Mathieu Olivari <mathieu at codeaurora.org>
---
 scripts/patch-rename.sh | 66 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100755 scripts/patch-rename.sh

diff --git a/scripts/patch-rename.sh b/scripts/patch-rename.sh
new file mode 100755
index 0000000..011d179
--- /dev/null
+++ b/scripts/patch-rename.sh
@@ -0,0 +1,66 @@
+#!/bin/bash
+
+usage() {
+	echo "Usage: `basename $0` [ -i addval ] [ -d decval ] xxx.patch yyy.patch ..."
+	echo -e "\t -i ==> increment patch files by \"addval\""
+	echo -e "\t -d ==> decrement patch files by \"decval\""
+	exit 1
+}
+
+_do_rename() {
+	local mod=$1
+	local op=$2
+	local file=$3
+	local oldval newval
+
+	[ -f $file ] || { echo "Can't find file: $file"; exit 1; }
+
+	oldval=$(echo $file | sed 's/.*\/\([0-9]*\)-[^\/]*/\1/')
+	digits=${#oldval}
+	newval=$((${oldval##0*0} $op $mod))
+	# Pad newval to the previous number of characters
+	newval=$(printf "%0${#oldval}d" $newval)
+	rename "s/$oldval/$newval/" $file || { \
+		echo "Can't rename file: $file\n"; \
+		exit 1; \
+	}
+}
+
+dec_patches() {
+	local decval=$1; shift
+	# process the lowest patch first to avoid having conflicting numbers
+	local patchlist=$(echo $@ | sort -n)
+	local oldval newval
+
+	for p in ${patchlist}; do
+		_do_rename $decval - $p
+	done
+}
+
+inc_patches() {
+	local incval=$1; shift
+	# process the highest patch first to avoid having conflicting numbers
+	local patchlist=$(echo $@ | sort -nr)
+	local oldval newval
+
+	for p in ${patchlist}; do
+		_do_rename $incval + $p
+	done
+}
+
+while getopts "i:d:" OPTION; do
+	case $OPTION in
+		i ) INCVAL=$OPTARG;;
+		d ) DECVAL=$OPTARG;;
+		* ) usage;;
+	esac
+done
+
+shift $((OPTIND-1))
+PATCH_LIST=$@
+
+# If the user didn't provide any file, show the usage information
+[ ${#PATCH_LIST} == 0 ] && usage
+
+[ -n "$INCVAL" ] && inc_patches $INCVAL $PATCH_LIST
+[ -n "$DECVAL" ] && dec_patches $DECVAL $PATCH_LIST
-- 
2.1.4
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