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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
#!/bin/sh
#
# This file is part of the coreboot project. It originated in the
# flashrom project but has been heavily modified since then.
#
# Copyright (C) 2013 Stefan Tauner
# Copyright (C) 2013 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
EXIT_SUCCESS=0
EXIT_FAILURE=1
# Make sure we don't get translated output
export LC_ALL=C
# nor local times or dates
export TZ=UTC0
# Helper functions
git_has_local_changes() {
git update-index -q --refresh >/dev/null
! git diff-index --quiet HEAD -- "$1"
}
git_last_commit() {
git log --pretty=format:"%h" -1 -- "$1"
}
git_is_file_tracked() {
git ls-files --error-unmatch -- "$1" >/dev/null 2>&1
}
is_file_tracked() {
git_is_file_tracked "$1"
}
# Tries to find a remote source for the changes committed locally.
# This includes the URL of the remote repository including the last commit and a suitable branch name.
# Takes one optional argument: the path to inspect
git_url() {
# Note: This may not work as expected if multiple remotes are fetched from.
echo $(git remote -v | \
awk '/fetch/ {split($2, pieces, "@"); print pieces[2]; exit 0}')
}
# Returns a string indicating where others can get the current source code (excluding uncommitted changes)
# Takes one optional argument: the path to inspect
scm_url() {
local url
url="$(git_url "$1")"
echo "${url}"
}
# Retrieve timestamp since last modification. If the sources are pristine,
# then the timestamp will match that of the SCM's most recent modification
# date.
timestamp() {
local t
# date syntaxes are manifold:
# gnu date [-d input]... [+FORMAT]
# netbsd date [-ajnu] [-d date] [-r seconds] [+format] [[[[[[CC]yy]mm]dd]HH]MM[.SS]]
# freebsd date [-jnu] [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
# dragonflybsd date [-jnu] [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
# openbsd date [-aju] [-d dst] [-r seconds] [+format] [[[[[[cc]yy]mm]dd]HH]MM[.SS]] [...]
if git_is_file_tracked "$2" ; then
# are there local changes?
if git_has_local_changes "$2" ; then
t=$(date -u "${1}")
else
# No local changes, get date of the last commit
case $(uname) in
# Most BSD dates do not support parsing date values from user input with -d but all of
# them support parsing epoch seconds with -r. Thanks to git we can easily use that:
NetBSD|OpenBSD|DragonFly|FreeBSD)
t=$(date -u -r "$(git log --pretty=format:%ct -1 -- $2)" "$1" 2>/dev/null);;
*)
t=$(date -d "$(git log --pretty=format:%cD -1 -- $2)" -u "$1" 2>/dev/null);;
esac
fi
else
t=$(date -u "$1")
fi
if [ -z "$t" ]; then
echo "Warning: Could not determine timestamp." 2>/dev/null
fi
echo "${t}"
}
# Retrieve local SCM revision info. This is useful if we're working in a different SCM than upstream and/or
# have local changes.
local_revision() {
local r
if git_is_file_tracked "$1" ; then
r=$(git_last_commit "$1")
if git_has_local_changes "$1" ; then
r="$r-dirty"
fi
else
return ${EXIT_FAILURE}
fi
echo "${r}"
}
upstream_revision() {
local r=
r=$(git log remotes/origin/master -1 --format=format:%h)
if [ -z "$r" ]; then
r="unknown" # default to unknown
fi
echo "${r}"
}
show_help() {
echo "Usage:
${0} <command> [path]
Commands
-h or --help
this message
-l or --local
local revision information including an indicator for uncommitted changes
-u or --upstream
upstream revision
-U or --url
URL associated with the latest commit
-d or --date
date of most recent modification
-t or --timestamp
timestamp of most recent modification
"
return
}
check_action() {
if [ -n "$action" ]; then
echo "Error: Multiple actions given.">&2
exit ${EXIT_FAILURE}
fi
}
main() {
local query_path=
local action=
# The is the main loop
while [ $# -gt 0 ];
do
case ${1} in
-h|--help)
action=show_help;
shift;;
-l|--local)
check_action $1
action=local_revision
shift;;
-u|--upstream)
check_action $1
action=upstream_revision
shift;;
-U|--url)
check_action $1
action=scm_url
shift;;
-d|--date)
check_action $1
action="timestamp +%Y-%m-%d" # refrain from suffixing 'Z' to indicate it's UTC
shift;;
-t|--timestamp)
check_action $1
action="timestamp +%Y-%m-%dT%H:%M:%SZ" # There is only one valid time format! ISO 8601
shift;;
-*)
show_help;
echo "Error: Invalid option: ${1}"
exit ${EXIT_FAILURE};;
*)
if [ -z "$query_path" ] ; then
if [ ! -e "$1" ] ; then
echo "Error: Path \"${1}\" does not exist.">&2
exit ${EXIT_FAILURE}
fi
query_path=$1
else
echo "Warning: Ignoring over-abundant paramter: \"${1}\"">&2
fi
shift;;
esac;
done
# default to current directory (usually equals the whole repository)
if [ -z "$query_path" ] ; then
query_path=.
fi
if ! is_file_tracked "$query_path" ; then
echo "Warning: Path \"${query_path}\" is not under version control.">&2
fi
if [ -z "$action" ] ; then
show_help
echo "Error: No actions specified"
exit ${EXIT_FAILURE}
fi
$action "$query_path"
}
main $@
|
