18abd745a0
This completes the initial round of git-pickaxe. In addition to the detection of line movements we already have, this finds new lines that were created by moving or cutting-and-pasting lines from different files in the parent. With this, git pickaxe -f -n -C v1.4.0 -- revision.c finds that a major part of that file actually came from rev-list.c when Linus split the latter at commit ae563642 and blames them to earlier commits that touch rev-list.c. Signed-off-by: Junio C Hamano <junkio@cox.net>
125 lines
3.9 KiB
Plaintext
125 lines
3.9 KiB
Plaintext
git-pickaxe(1)
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==============
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NAME
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----
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git-pickaxe - Show what revision and author last modified each line of a file
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SYNOPSIS
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--------
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[verse]
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'git-pickaxe' [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>]
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[-M] [-C] [-C] [--since=<date>] [<rev>] [--] <file>
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DESCRIPTION
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-----------
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Annotates each line in the given file with information from the revision which
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last modified the line. Optionally, start annotating from the given revision.
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Also it can limit the range of lines annotated.
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This report doesn't tell you anything about lines which have been deleted or
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replaced; you need to use a tool such as gitlink:git-diff[1] or the "pickaxe"
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interface briefly mentioned in the following paragraph.
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Apart from supporting file annotation, git also supports searching the
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development history for when a code snippet occured in a change. This makes it
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possible to track when a code snippet was added to a file, moved or copied
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between files, and eventually deleted or replaced. It works by searching for
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a text string in the diff. A small example:
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-----------------------------------------------------------------------------
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$ git log --pretty=oneline -S'blame_usage'
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5040f17eba15504bad66b14a645bddd9b015ebb7 blame -S <ancestry-file>
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ea4c7f9bf69e781dd0cd88d2bccb2bf5cc15c9a7 git-blame: Make the output
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-----------------------------------------------------------------------------
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OPTIONS
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-------
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-c, --compatibility::
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Use the same output mode as gitlink:git-annotate[1] (Default: off).
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-L n,m::
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Annotate only the specified line range (lines count from 1).
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-l, --long::
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Show long rev (Default: off).
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-t, --time::
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Show raw timestamp (Default: off).
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-S, --rev-file <revs-file>::
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Use revs from revs-file instead of calling gitlink:git-rev-list[1].
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-f, --show-name::
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Show filename in the original commit. By default
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filename is shown if there is any line that came from a
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file with different name, due to rename detection.
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-n, --show-number::
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Show line number in the original commit (Default: off).
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-p, --porcelain::
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Show in a format designed for machine consumption.
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-M::
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Detect moving lines in the file as well. When a commit
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moves a block of lines in a file (e.g. the original file
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has A and then B, and the commit changes it to B and
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then A), traditional 'blame' algorithm typically blames
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the lines that were moved up (i.e. B) to the parent and
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assigns blame to the lines that were moved down (i.e. A)
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to the child commit. With this option, both groups of
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lines are blamed on the parent.
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-C::
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In addition to `-M`, detect lines copied from other
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files that were modified in the same commit. This is
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useful when you reorganize your program and move code
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around across files. When this option is given twice,
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the command looks for copies from all other files in the
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parent for the commit that creates the file in addition.
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-h, --help::
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Show help message.
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THE PORCELAIN FORMAT
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--------------------
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In this format, each line is output after a header; the
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header at the minumum has the first line which has:
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- 40-byte SHA-1 of the commit the line is attributed to;
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- the line number of the line in the original file;
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- the line number of the line in the final file;
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- on a line that starts a group of line from a different
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commit than the previous one, the number of lines in this
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group. On subsequent lines this field is absent.
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This header line is followed by the following information
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at least once for each commit:
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- author name ("author"), email ("author-mail"), time
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("author-time"), and timezone ("author-tz"); similarly
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for committer.
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- filename in the commit the line is attributed to.
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- the first line of the commit log message ("summary").
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The contents of the actual line is output after the above
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header, prefixed by a TAB. This is to allow adding more
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header elements later.
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SEE ALSO
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--------
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gitlink:git-blame[1]
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AUTHOR
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------
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Written by Junio C Hamano <junkio@cox.net>
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GIT
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---
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Part of the gitlink:git[7] suite
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