git-pickaxe: retire pickaxe

Just make it take over blame's place.  Documentation and command
have all stopped mentioning "git-pickaxe".  The built-in synonym
is left in the command table, so you can still say "git pickaxe",
but it probably is a good idea to retire it as well.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 68 insertions, 2 deletions

diff --git a/Documentation/git-blame.txt b/Documentation/git-blame.txt
index 9891c1d377..ff54d29d70 100644
--- a/Documentation/git-blame.txt
+++ b/Documentation/git-blame.txt
@@ -7,7 +7,9 @@ git-blame - Show what revision and author last modified each line of a file
 
 SYNOPSIS
 --------
-'git-blame' [-c] [-l] [-t] [-f] [-n] [-p] [-S <revs-file>] [--] <file> [<rev>]
+[verse]
+'git-blame' [-c] [-l] [-t] [-f] [-n] [-p] [-L n,m] [-S <revs-file>]
+            [-M] [-C] [-C] [--since=<date>] [<rev>] [--] <file>
 
 DESCRIPTION
 -----------
@@ -15,6 +17,8 @@ DESCRIPTION
 Annotates each line in the given file with information from the revision which
 last modified the line. Optionally, start annotating from the given revision.
 
+Also it can limit the range of lines annotated.
+
 This report doesn't tell you anything about lines which have been deleted or
 replaced; you need to use a tool such as gitlink:git-diff[1] or the "pickaxe"
 interface briefly mentioned in the following paragraph.
@@ -36,6 +40,12 @@ OPTIONS
 -c, --compatibility::
 	Use the same output mode as gitlink:git-annotate[1] (Default: off).
 
+-L n,m::
+	Annotate only the specified line range (lines count from
+	1).  The range can be specified with a regexp.  For
+	example, `-L '/^sub esc_html /,/^}$/'` limits the
+	annotation only to the body of `esc_html` subroutine.
+
 -l, --long::
 	Show long rev (Default: off).
 
@@ -56,6 +66,24 @@ OPTIONS
 -p, --porcelain::
 	Show in a format designed for machine consumption.
 
+-M::
+	Detect moving lines in the file as well.  When a commit
+	moves a block of lines in a file (e.g. the original file
+	has A and then B, and the commit changes it to B and
+	then A), traditional 'blame' algorithm typically blames
+	the lines that were moved up (i.e. B) to the parent and
+	assigns blame to the lines that were moved down (i.e. A)
+	to the child commit.  With this option, both groups of
+	lines are blamed on the parent.
+
+-C::
+	In addition to `-M`, detect lines copied from other
+	files that were modified in the same commit.  This is
+	useful when you reorganize your program and move code
+	around across files.  When this option is given twice,
+	the command looks for copies from all other files in the
+	parent for the commit that creates the file in addition.
+
 -h, --help::
 	Show help message.
 
@@ -86,13 +114,51 @@ The contents of the actual line is output after the above
 header, prefixed by a TAB. This is to allow adding more
 header elements later.
 
+
+SPECIFIYING RANGES
+------------------
+
+Unlike `git-blame` and `git-annotate` in older git, the extent
+of annotation can be limited to both line ranges and revision
+ranges.  When you are interested in finding the origin for
+ll. 40-60 for file `foo`, you can use `-L` option like this:
+
+	git blame -L 40,60 foo
+
+When you are not interested in changes older than the version
+v2.6.18, or changes older than 3 weeks, you can use revision
+range specifiers  similar to `git-rev-list`:
+
+	git blame v2.6.18.. -- foo
+	git blame --since=3.weeks -- foo
+
+When revision range specifiers are used to limit the annotation,
+lines that have not changed since the range boundary (either the
+commit v2.6.18 or the most recent commit that is more than 3
+weeks old in the above example) are blamed for that range
+boundary commit.
+
+A particularly useful way is to see if an added file have lines
+created by copy-and-paste from existing files.  Sometimes this
+indicates that the developer was being sloppy and did not
+refactor the code properly.  You can first find the commit that
+introduced the file with:
+
+	git log --diff-filter=A --pretty=short -- foo
+
+and then annotate the change between the commit and its
+parents, using `commit{caret}!` notation:
+
+	git blame -C -C -f $commit^! -- foo
+
+
 SEE ALSO
 --------
 gitlink:git-annotate[1]
 
 AUTHOR
 ------
-Written by Fredrik Kuivinen <freku045@student.liu.se>.
+Written by Junio C Hamano <junkio@cox.net>
 
 GIT
 ---