mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Bert Wesarg](/assets/img/avatar_default.png)
Tries to shorten the refname to a non-ambiguous name. Szeder Gábor noticed that the git bash completion takes a tremendous amount of time to strip leading components from heads and tags refs (i.e. refs/heads, refs/tags, ...). He proposed a new atom called 'refbasename' which removes at most two leading components from the ref name. I myself, proposed a more dynamic solution, which strips off common leading components with the matched pattern. But the current bash solution and both proposals suffer from one mayor problem: ambiguous refs. A ref is ambiguous, if it resolves to more than one full refs. I.e. given the refs refs/heads/xyzzy and refs/tags/xyzzy. The (short) ref xyzzy can point to both refs. ( Note: Its irrelevant whether the referenced objects are the same or not. ) This proposal solves this by checking for ambiguity of the shorten ref name. The shortening is done with the same rules for resolving refs but in the reverse order. The short name is checked if it resolves to a different ref. To continue the above example, the output would be like this: heads/xyzzy xyzzy So, if you want just tags, xyzzy is not ambiguous, because it will resolve to a tag. If you need the heads you get a also a non-ambiguous short form of the ref. To integrate this new format into the bash completion to get only non-ambiguous refs is beyond the scope of this patch. Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
199 lines
5 KiB
Plaintext
199 lines
5 KiB
Plaintext
git-for-each-ref(1)
|
|
===================
|
|
|
|
NAME
|
|
----
|
|
git-for-each-ref - Output information on each ref
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git for-each-ref' [--count=<count>] [--shell|--perl|--python|--tcl]
|
|
[--sort=<key>]\* [--format=<format>] [<pattern>...]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
|
|
Iterate over all refs that match `<pattern>` and show them
|
|
according to the given `<format>`, after sorting them according
|
|
to the given set of `<key>`. If `<count>` is given, stop after
|
|
showing that many refs. The interpolated values in `<format>`
|
|
can optionally be quoted as string literals in the specified
|
|
host language allowing their direct evaluation in that language.
|
|
|
|
OPTIONS
|
|
-------
|
|
<count>::
|
|
By default the command shows all refs that match
|
|
`<pattern>`. This option makes it stop after showing
|
|
that many refs.
|
|
|
|
<key>::
|
|
A field name to sort on. Prefix `-` to sort in
|
|
descending order of the value. When unspecified,
|
|
`refname` is used. You may use the --sort=<key> option
|
|
multiple times, in which case the last key becomes the primary
|
|
key.
|
|
|
|
<format>::
|
|
A string that interpolates `%(fieldname)` from the
|
|
object pointed at by a ref being shown. If `fieldname`
|
|
is prefixed with an asterisk (`*`) and the ref points
|
|
at a tag object, the value for the field in the object
|
|
tag refers is used. When unspecified, defaults to
|
|
`%(objectname) SPC %(objecttype) TAB %(refname)`.
|
|
It also interpolates `%%` to `%`, and `%xx` where `xx`
|
|
are hex digits interpolates to character with hex code
|
|
`xx`; for example `%00` interpolates to `\0` (NUL),
|
|
`%09` to `\t` (TAB) and `%0a` to `\n` (LF).
|
|
|
|
<pattern>...::
|
|
If one or more patterns are given, only refs are shown that
|
|
match against at least one pattern, either using fnmatch(3) or
|
|
literally, in the latter case matching completely or from the
|
|
beginning up to a slash.
|
|
|
|
--shell::
|
|
--perl::
|
|
--python::
|
|
--tcl::
|
|
If given, strings that substitute `%(fieldname)`
|
|
placeholders are quoted as string literals suitable for
|
|
the specified host language. This is meant to produce
|
|
a scriptlet that can directly be `eval`ed.
|
|
|
|
|
|
FIELD NAMES
|
|
-----------
|
|
|
|
Various values from structured fields in referenced objects can
|
|
be used to interpolate into the resulting output, or as sort
|
|
keys.
|
|
|
|
For all objects, the following names can be used:
|
|
|
|
refname::
|
|
The name of the ref (the part after $GIT_DIR/).
|
|
For a non-ambiguous short name of the ref append `:short`.
|
|
|
|
objecttype::
|
|
The type of the object (`blob`, `tree`, `commit`, `tag`).
|
|
|
|
objectsize::
|
|
The size of the object (the same as 'git-cat-file -s' reports).
|
|
|
|
objectname::
|
|
The object name (aka SHA-1).
|
|
|
|
In addition to the above, for commit and tag objects, the header
|
|
field names (`tree`, `parent`, `object`, `type`, and `tag`) can
|
|
be used to specify the value in the header field.
|
|
|
|
Fields that have name-email-date tuple as its value (`author`,
|
|
`committer`, and `tagger`) can be suffixed with `name`, `email`,
|
|
and `date` to extract the named component.
|
|
|
|
The first line of the message in a commit and tag object is
|
|
`subject`, the remaining lines are `body`. The whole message
|
|
is `contents`.
|
|
|
|
For sorting purposes, fields with numeric values sort in numeric
|
|
order (`objectsize`, `authordate`, `committerdate`, `taggerdate`).
|
|
All other fields are used to sort in their byte-value order.
|
|
|
|
In any case, a field name that refers to a field inapplicable to
|
|
the object referred by the ref does not cause an error. It
|
|
returns an empty string instead.
|
|
|
|
As a special case for the date-type fields, you may specify a format for
|
|
the date by adding one of `:default`, `:relative`, `:short`, `:local`,
|
|
`:iso8601` or `:rfc2822` to the end of the fieldname; e.g.
|
|
`%(taggerdate:relative)`.
|
|
|
|
|
|
EXAMPLES
|
|
--------
|
|
|
|
An example directly producing formatted text. Show the most recent
|
|
3 tagged commits::
|
|
|
|
------------
|
|
#!/bin/sh
|
|
|
|
git for-each-ref --count=3 --sort='-*authordate' \
|
|
--format='From: %(*authorname) %(*authoremail)
|
|
Subject: %(*subject)
|
|
Date: %(*authordate)
|
|
Ref: %(*refname)
|
|
|
|
%(*body)
|
|
' 'refs/tags'
|
|
------------
|
|
|
|
|
|
A simple example showing the use of shell eval on the output,
|
|
demonstrating the use of --shell. List the prefixes of all heads::
|
|
------------
|
|
#!/bin/sh
|
|
|
|
git for-each-ref --shell --format="ref=%(refname)" refs/heads | \
|
|
while read entry
|
|
do
|
|
eval "$entry"
|
|
echo `dirname $ref`
|
|
done
|
|
------------
|
|
|
|
|
|
A bit more elaborate report on tags, demonstrating that the format
|
|
may be an entire script::
|
|
------------
|
|
#!/bin/sh
|
|
|
|
fmt='
|
|
r=%(refname)
|
|
t=%(*objecttype)
|
|
T=${r#refs/tags/}
|
|
|
|
o=%(*objectname)
|
|
n=%(*authorname)
|
|
e=%(*authoremail)
|
|
s=%(*subject)
|
|
d=%(*authordate)
|
|
b=%(*body)
|
|
|
|
kind=Tag
|
|
if test "z$t" = z
|
|
then
|
|
# could be a lightweight tag
|
|
t=%(objecttype)
|
|
kind="Lightweight tag"
|
|
o=%(objectname)
|
|
n=%(authorname)
|
|
e=%(authoremail)
|
|
s=%(subject)
|
|
d=%(authordate)
|
|
b=%(body)
|
|
fi
|
|
echo "$kind $T points at a $t object $o"
|
|
if test "z$t" = zcommit
|
|
then
|
|
echo "The commit was authored by $n $e
|
|
at $d, and titled
|
|
|
|
$s
|
|
|
|
Its message reads as:
|
|
"
|
|
echo "$b" | sed -e "s/^/ /"
|
|
echo
|
|
fi
|
|
'
|
|
|
|
eval=`git for-each-ref --shell --format="$fmt" \
|
|
--sort='*objecttype' \
|
|
--sort=-taggerdate \
|
|
refs/tags`
|
|
eval "$eval"
|
|
------------
|