1 git-for-each-ref(1)
2 ===================
4 NAME
5 ----
6 git-for-each-ref - Output information on each ref
8 SYNOPSIS
9 --------
10 [verse]
11 'git-for-each-ref' [--count=<count>]\*
12 [--shell|--perl|--python|--tcl]
13 [--sort=<key>]\* [--format=<format>] [<pattern>]
15 DESCRIPTION
16 -----------
18 Iterate over all refs that match `<pattern>` and show them
19 according to the given `<format>`, after sorting them according
20 to the given set of `<key>`. If `<max>` is given, stop after
21 showing that many refs. The interpolated values in `<format>`
22 can optionally be quoted as string literals in the specified
23 host language allowing their direct evaluation in that language.
25 OPTIONS
26 -------
27 <count>::
28 By default the command shows all refs that match
29 `<pattern>`. This option makes it stop after showing
30 that many refs.
32 <key>::
33 A field name to sort on. Prefix `-` to sort in
34 descending order of the value. When unspecified,
35 `refname` is used. More than one sort keys can be
36 given.
38 <format>::
39 A string that interpolates `%(fieldname)` from the
40 object pointed at by a ref being shown. If `fieldname`
41 is prefixed with an asterisk (`*`) and the ref points
42 at a tag object, the value for the field in the object
43 tag refers is used. When unspecified, defaults to
44 `%(objectname) SPC %(objecttype) TAB %(refname)`.
45 It also interpolates `%%` to `%`, and `%xx` where `xx`
46 are hex digits interpolates to character with hex code
47 `xx`; for example `%00` interpolates to `\0` (NUL),
48 `%09` to `\t` (TAB) and `%0a` to `\n` (LF).
50 <pattern>::
51 If given, the name of the ref is matched against this
52 using fnmatch(3). Refs that do not match the pattern
53 are not shown.
55 --shell, --perl, --python, --tcl::
56 If given, strings that substitute `%(fieldname)`
57 placeholders are quoted as string literals suitable for
58 the specified host language. This is meant to produce
59 a scriptlet that can directly be `eval`ed.
62 FIELD NAMES
63 -----------
65 Various values from structured fields in referenced objects can
66 be used to interpolate into the resulting output, or as sort
67 keys.
69 For all objects, the following names can be used:
71 refname::
72 The name of the ref (the part after $GIT_DIR/).
74 objecttype::
75 The type of the object (`blob`, `tree`, `commit`, `tag`).
77 objectsize::
78 The size of the object (the same as `git-cat-file -s` reports).
80 objectname::
81 The object name (aka SHA-1).
83 In addition to the above, for commit and tag objects, the header
84 field names (`tree`, `parent`, `object`, `type`, and `tag`) can
85 be used to specify the value in the header field.
87 Fields that have name-email-date tuple as its value (`author`,
88 `committer`, and `tagger`) can be suffixed with `name`, `email`,
89 and `date` to extract the named component.
91 The first line of the message in a commit and tag object is
92 `subject`, the remaining lines are `body`. The whole message
93 is `contents`.
95 For sorting purposes, fields with numeric values sort in numeric
96 order (`objectsize`, `authordate`, `committerdate`, `taggerdate`).
97 All other fields are used to sort in their byte-value order.
99 In any case, a field name that refers to a field inapplicable to
100 the object referred by the ref does not cause an error. It
101 returns an empty string instead.
104 EXAMPLES
105 --------
107 An example directly producing formatted text. Show the most recent
108 3 tagged commits::
110 ------------
111 #!/bin/sh
113 git-for-each-ref --count=3 --sort='-*authordate' \
114 --format='From: %(*authorname) %(*authoremail)
115 Subject: %(*subject)
116 Date: %(*authordate)
117 Ref: %(*refname)
119 %(*body)
120 ' 'refs/tags'
121 ------------
124 A simple example showing the use of shell eval on the output,
125 demonstrating the use of --shell. List the prefixes of all heads::
126 ------------
127 #!/bin/sh
129 git-for-each-ref --shell --format="ref=%(refname)" refs/heads | \
130 while read entry
131 do
132 eval "$entry"
133 echo `dirname $ref`
134 done
135 ------------
138 A bit more elaborate report on tags, demonstrating that the format
139 may be an entire script::
140 ------------
141 #!/bin/sh
143 fmt='
144 r=%(refname)
145 t=%(*objecttype)
146 T=${r#refs/tags/}
148 o=%(*objectname)
149 n=%(*authorname)
150 e=%(*authoremail)
151 s=%(*subject)
152 d=%(*authordate)
153 b=%(*body)
155 kind=Tag
156 if test "z$t" = z
157 then
158 # could be a lightweight tag
159 t=%(objecttype)
160 kind="Lightweight tag"
161 o=%(objectname)
162 n=%(authorname)
163 e=%(authoremail)
164 s=%(subject)
165 d=%(authordate)
166 b=%(body)
167 fi
168 echo "$kind $T points at a $t object $o"
169 if test "z$t" = zcommit
170 then
171 echo "The commit was authored by $n $e
172 at $d, and titled
174 $s
176 Its message reads as:
177 "
178 echo "$b" | sed -e "s/^/ /"
179 echo
180 fi
181 '
183 eval=`git-for-each-ref --shell --format="$fmt" \
184 --sort='*objecttype' \
185 --sort=-taggerdate \
186 refs/tags`
187 eval "$eval"
188 ------------