cab851c2f8
'--object-only' is an alias for '--format=%(objectname)'. It cannot
be used together other format-altering options like '--name-only',
'--long' or '--format', they are mutually exclusive.
The "--name-only" option outputs <filepath> only. Likewise, <objectName>
is another high frequency used field, so implement '--object-only' option
will bring intuitive and clear semantics for this scenario. Using
'--format=%(objectname)' we can achieve a similar effect, but the former
is with a lower learning cost(without knowing the format requirement
of '--format' option).
Even so, if a user is prefer to use "--format=%(objectname)", this is entirely
welcome because they are not only equivalent in function, but also have almost
identical performance. The reason is this commit also add the specific of
"--format=%(objectname)" to the current fast-pathes (builtin formats) to
avoid running unnecessary parsing mechanisms.
The following performance benchmarks are based on torvalds/linux.git:
When hit the fast-path:
Benchmark 1: /opt/git/ls-tree-oid-only/bin/git ls-tree -r --object-only HEAD
Time (mean ± σ): 83.6 ms ± 2.0 ms [User: 59.4 ms, System: 24.1 ms]
Range (min … max): 80.4 ms … 87.2 ms 35 runs
Benchmark 1: /opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='%(objectname)' HEAD
Time (mean ± σ): 84.1 ms ± 1.8 ms [User: 61.7 ms, System: 22.3 ms]
Range (min … max): 80.9 ms … 87.5 ms 35 runs
But for a customized format, it will be slower:
Benchmark 1: /opt/git/ls-tree-oid-only/bin/git ls-tree -r --format='oid: %(objectname)' HEAD
Time (mean ± σ): 96.5 ms ± 2.5 ms [User: 72.9 ms, System: 23.5 ms]
Range (min … max): 93.1 ms … 104.1 ms 31 runs
Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
166 lines
5.3 KiB
Plaintext
166 lines
5.3 KiB
Plaintext
git-ls-tree(1)
|
|
==============
|
|
|
|
NAME
|
|
----
|
|
git-ls-tree - List the contents of a tree object
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git ls-tree' [-d] [-r] [-t] [-l] [-z]
|
|
[--name-only] [--name-status] [--object-only] [--full-name] [--full-tree] [--abbrev[=<n>]] [--format=<format>]
|
|
<tree-ish> [<path>...]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
Lists the contents of a given tree object, like what "/bin/ls -a" does
|
|
in the current working directory. Note that:
|
|
|
|
- the behaviour is slightly different from that of "/bin/ls" in that the
|
|
'<path>' denotes just a list of patterns to match, e.g. so specifying
|
|
directory name (without `-r`) will behave differently, and order of the
|
|
arguments does not matter.
|
|
|
|
- the behaviour is similar to that of "/bin/ls" in that the '<path>' is
|
|
taken as relative to the current working directory. E.g. when you are
|
|
in a directory 'sub' that has a directory 'dir', you can run 'git
|
|
ls-tree -r HEAD dir' to list the contents of the tree (that is
|
|
`sub/dir` in `HEAD`). You don't want to give a tree that is not at the
|
|
root level (e.g. `git ls-tree -r HEAD:sub dir`) in this case, as that
|
|
would result in asking for `sub/sub/dir` in the `HEAD` commit.
|
|
However, the current working directory can be ignored by passing
|
|
--full-tree option.
|
|
|
|
OPTIONS
|
|
-------
|
|
<tree-ish>::
|
|
Id of a tree-ish.
|
|
|
|
-d::
|
|
Show only the named tree entry itself, not its children.
|
|
|
|
-r::
|
|
Recurse into sub-trees.
|
|
|
|
-t::
|
|
Show tree entries even when going to recurse them. Has no effect
|
|
if `-r` was not passed. `-d` implies `-t`.
|
|
|
|
-l::
|
|
--long::
|
|
Show object size of blob (file) entries.
|
|
|
|
-z::
|
|
\0 line termination on output and do not quote filenames.
|
|
See OUTPUT FORMAT below for more information.
|
|
|
|
--name-only::
|
|
--name-status::
|
|
List only filenames (instead of the "long" output), one per line.
|
|
Cannot be combined with `--object-only`.
|
|
|
|
--object-only::
|
|
List only names of the objects, one per line. Cannot be combined
|
|
with `--name-only` or `--name-status`.
|
|
This is equivalent to specifying `--format='%(objectname)'`, but
|
|
for both this option and that exact format the command takes a
|
|
hand-optimized codepath instead of going through the generic
|
|
formatting mechanism.
|
|
|
|
--abbrev[=<n>]::
|
|
Instead of showing the full 40-byte hexadecimal object
|
|
lines, show the shortest prefix that is at least '<n>'
|
|
hexdigits long that uniquely refers the object.
|
|
Non default number of digits can be specified with --abbrev=<n>.
|
|
|
|
--full-name::
|
|
Instead of showing the path names relative to the current working
|
|
directory, show the full path names.
|
|
|
|
--full-tree::
|
|
Do not limit the listing to the current working directory.
|
|
Implies --full-name.
|
|
|
|
--format=<format>::
|
|
A string that interpolates `%(fieldname)` from the result
|
|
being shown. 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).
|
|
When specified, `--format` cannot be combined with other
|
|
format-altering options, including `--long`, `--name-only`
|
|
and `--object-only`.
|
|
|
|
[<path>...]::
|
|
When paths are given, show them (note that this isn't really raw
|
|
pathnames, but rather a list of patterns to match). Otherwise
|
|
implicitly uses the root level of the tree as the sole path argument.
|
|
|
|
|
|
Output Format
|
|
-------------
|
|
|
|
The output format of `ls-tree` is determined by either the `--format`
|
|
option, or other format-altering options such as `--name-only` etc.
|
|
(see `--format` above).
|
|
|
|
The use of certain `--format` directives is equivalent to using those
|
|
options, but invoking the full formatting machinery can be slower than
|
|
using an appropriate formatting option.
|
|
|
|
In cases where the `--format` would exactly map to an existing option
|
|
`ls-tree` will use the appropriate faster path. Thus the default format
|
|
is equivalent to:
|
|
|
|
%(objectmode) %(objecttype) %(objectname)%x09%(path)
|
|
|
|
This output format is compatible with what `--index-info --stdin` of
|
|
'git update-index' expects.
|
|
|
|
When the `-l` option is used, format changes to
|
|
|
|
%(objectmode) %(objecttype) %(objectname) %(objectsize:padded)%x09%(path)
|
|
|
|
Object size identified by <objectname> is given in bytes, and right-justified
|
|
with minimum width of 7 characters. Object size is given only for blobs
|
|
(file) entries; for other entries `-` character is used in place of size.
|
|
|
|
Without the `-z` option, pathnames with "unusual" characters are
|
|
quoted as explained for the configuration variable `core.quotePath`
|
|
(see linkgit:git-config[1]). Using `-z` the filename is output
|
|
verbatim and the line is terminated by a NUL byte.
|
|
|
|
Customized format:
|
|
|
|
It is possible to print in a custom format by using the `--format` option,
|
|
which is able to interpolate different fields using a `%(fieldname)` notation.
|
|
For example, if you only care about the "objectname" and "path" fields, you
|
|
can execute with a specific "--format" like
|
|
|
|
git ls-tree --format='%(objectname) %(path)' <tree-ish>
|
|
|
|
FIELD NAMES
|
|
-----------
|
|
|
|
Various values from structured fields can be used to interpolate
|
|
into the resulting output. For each outputing line, the following
|
|
names can be used:
|
|
|
|
objectmode::
|
|
The mode of the object.
|
|
objecttype::
|
|
The type of the object (`blob` or `tree`).
|
|
objectname::
|
|
The name of the object.
|
|
objectsize[:padded]::
|
|
The size of the object ("-" if it's a tree).
|
|
It also supports a padded format of size with "%(size:padded)".
|
|
path::
|
|
The pathname of the object.
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|