1#!/bin/bash
2# Whitespace fixer
3# Usage: fix_ws [dir]...
4
5temp="/tmp/fix_ws.$$.$RANDOM"
6
7# Using $'xxx' bashism
8begin8sp_tab=$'s/^        /\t/'
9beginchar7sp_chartab=$'s/^\\([^ \t]\\)       /\\1\t/'
10tab8sp_tabtab=$'s/\t        /\t\t/g'
11tab8sptab_tabtabtab=$'s/\t        \t/\t\t\t/g'
12begin17sptab_tab=$'s/^ \\{1,7\\}\t/\t/'
13tab17sptab_tabtab=$'s/\t \\{1,7\\}\t/\t\t/g'
14trailingws_=$'s/[ \t]*$//'
15
16#>fix_ws.diff
17
18find "$@" -type f \
19| while read name; do
20    test "YES" = "${name/*.bz2/YES}" && continue
21    test "YES" = "${name/*.gz/YES}" && continue
22    test "YES" = "${name/*.png/YES}" && continue
23    test "YES" = "${name/*.gif/YES}" && continue
24    test "YES" = "${name/*.jpg/YES}" && continue
25    test "YES" = "${name/*.diff/YES}" && continue
26    test "YES" = "${name/*.patch/YES}" && continue
27    # shell testsuite entries are not to be touched too
28    test "YES" = "${name/*.right/YES}" && continue
29
30    if test "YES" = "${name/*.[chsS]/YES}" \
31	-o "YES" = "${name/*.sh/YES}" \
32	-o "YES" = "${name/*.txt/YES}" \
33	-o "YES" = "${name/*.html/YES}" \
34	-o "YES" = "${name/*.htm/YES}" \
35	-o "YES" = "${name/*Config.in*/YES}" \
36    ; then
37    # More aggressive whitespace fixes for known file types
38	echo "Formatting: $name" >&2
39	cat "$name" \
40	| sed -e "$tab8sptab_tabtabtab" -e "$tab8sptab_tabtabtab" \
41	      -e "$tab8sptab_tabtabtab" -e "$tab8sptab_tabtabtab" \
42	| sed "$begin17sptab_tab" \
43	| sed -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
44	      -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
45	      -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
46	| sed "$trailingws_"
47    elif test "YES" = "${name/*Makefile*/YES}" \
48	-o "YES" = "${name/*Kbuild*/YES}" \
49    ; then
50    # For Makefiles, never convert "1-7spaces+tab" into "tabtab"
51	echo "Makefile: $name" >&2
52	cat "$name" \
53	| sed -e "$tab8sptab_tabtabtab" -e "$tab8sptab_tabtabtab" \
54	      -e "$tab8sptab_tabtabtab" -e "$tab8sptab_tabtabtab" \
55	| sed -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
56	      -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
57	      -e "$tab17sptab_tabtab" -e "$tab17sptab_tabtab" \
58	| sed "$trailingws_"
59    else
60    # Only remove trailing WS for the rest
61	echo "Removing trailing whitespace: $name" >&2
62	cat "$name" \
63	| sed "$trailingws_"
64    fi >"$temp"
65
66#    diff -u "$temp" "$name" >>fix_ws.diff
67
68    # Conserve mode/symlink:
69    cat "$temp" >"$name"
70done
71rm "$temp" 2>/dev/null
72