1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#! /usr/bin/env bash
set -eu -o pipefail
FILE=
BASE=
HEAD=HEAD
declare -a args=()
diff_input=false
show_help=false
for opt in "$@" ; do
case "${opt}" in
-h | --help)
show_help=true
;;
-d | --diff)
diff_input=true
;;
-o*)
FILE=${opt#-o}
;;
*)
args+=("${opt}")
;;
esac
done
declare -r diff_input show_help
show_help ()
{
echo "Usage: $0 [-o<file>] [-d|--diff] [<committish> [<committish>]]"
}
if ${show_help} ; then
show_help
exit
fi
if [[ ${#args[@]} -eq 1 ]] ; then
BASE=${args[0]}
elif [[ ${#args[@]} -eq 2 ]] ; then
BASE=${args[0]}
HEAD=${args[1]}
elif [[ ${#args[@]} -eq 0 ]] && ${diff_input} ; then
: no-op
else
show_help 1>&2
exit 1
fi
declare -r BASE HEAD
declare -ra clang_format_diff_candidates=(
# Search in $PATH (Ubuntu, Debian, maybe others)
clang-format-diff-13
clang-format-diff-13.py
clang-format-diff
clang-format-diff.py
# Arch Linux, Fedora.
/usr/share/clang/clang-format-diff.py
)
find_program ()
{
local candidate path
for candidate in "$@" ; do
path=$(type -P "${candidate}")
if [[ -x ${path} ]] ; then
echo "${path}"
return
fi
done
# Not found.
return 1
}
clang_format_diff=$(find_program "${clang_format_diff_candidates[@]}")
clang_format=$(find_program clang-format-11 clang-format)
declare -r clang_format_diff clang_format
if [[ ! -x ${clang_format_diff} ]] ; then
echo "$0: clang-format-diff does not seem to be installed" 1>&2
exit 1
fi
if [[ ! -x ${clang_format} ]] ; then
echo "$0: clang-format does not seem to be installed" 1>&2
exit 1
fi
#
# Check the version of clang-format, to make sure that it will support the
# configuration file. The output of "clang-format --version" is formatted
# as follows:
#
# clang-format version X.Y.Z
#
declare -r clang_format_min_version=11
clang_format_version=$("${clang_format}" --version)
if [[ ${clang_format_version} =~ clang-format[[:space:]]+version[[:space:]]+([[:digit:]]+)\. ]] ; then
clang_format_version=${BASH_REMATCH[1]}
if [[ ${clang_format_version} -lt ${clang_format_min_version} ]] ; then
echo "$0: clang-format ${clang_format_min_version}+ is needed, ${clang_format_version} detected" 1>&2
exit 1
fi
else
echo "$0: clang-format did not report its version number"
exit 1
fi
if [[ -z ${FILE} ]] ; then
FILE=$(mktemp)
trap 'rm -f "${FILE}"' EXIT
else
trap '[[ -s ${FILE} ]] || rm -f "${FILE}"' EXIT
fi
declare -a input_cmd
if ${diff_input} ; then
input_cmd=(cat)
else
input_cmd=(git diff --no-color -U0 "${BASE}" "${HEAD}")
fi
"${input_cmd[@]}" \
| "${clang_format_diff}" -p1 -style=file -regex='.+\.(c|h)' \
| tee "${FILE}"
[[ ! -s ${FILE} ]]
|
