X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=Documentation%2Fgit-rev-parse.txt;h=8b95df0c6e2a147cd89fdb20605896852085cbc5;hb=8d6e10327dff232cc253a5753c43fb414fed4e00;hp=dfe21391aa8e5630c36ea06180f22b4eb1ce40cc;hpb=a3114b3428595710d4719dd668531210af5993c9;p=git.git

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index dfe21391..8b95df0c 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -3,7 +3,7 @@ git-rev-parse(1)
 
 NAME
 ----
-git-rev-parse - Pick out and massage parameters.
+git-rev-parse - Pick out and massage parameters
 
 
 SYNOPSIS
@@ -68,10 +68,23 @@ OPTIONS
 	Show all refs found in `$GIT_DIR/refs`.
 
 --show-prefix::
-	When the command is invoked from a directory show the
+	When the command is invoked from a subdirectory, show the
 	path of the current directory relative to the top-level
 	directory.
 
+--show-cdup::
+	When the command is invoked from a subdirectory, show the
+	path of the top-level directory relative to the current
+	directory (typically a sequence of "../", or an empty string).
+
+--git-dir::
+	Show `$GIT_DIR` if defined else show the path to the .git directory.
+
+--short, --short=number::
+	Instead of outputting the full SHA1 values of object names try to
+	abbriviate them to a shorter unique name. When no length is specified
+	7 is used. The minimum length is 4.
+
 --since=datestring, --after=datestring::
 	Parses the date string, and outputs corresponding
 	--max-age= parameter for git-rev-list command.
@@ -132,6 +145,32 @@ which is passed to 'git-rev-list'.  Two revision parameters
 concatenated with '..' is a short-hand for writing a range
 between them.  I.e. 'r1..r2' is equivalent to saying '{caret}r1 r2'
 
+Here is an illustration, by Jon Loeliger.  Both node B and C are
+a commit parents of commit node A.  Parent commits are ordered
+left-to-right.
+
+    G   H   I   J
+     \ /     \ /
+      D   E   F
+       \  |  /
+        \ | /
+         \|/
+          B     C
+           \   /
+            \ /
+             A
+
+    A =      = A^0
+    B = A^   = A^1     = A~1
+    C = A^2  = A^2
+    D = A^^  = A^1^1   = A~2
+    E = B^2  = A^^2
+    F = B^3  = A^^3
+    G = A^^^ = A^1^1^1 = A~3
+    H = D^2  = B^^2    = A^^^2  = A~2^2
+    I = F^   = B^3^    = A^^3^
+    J = F^2  = B^3^2   = A^^3^2
+
 
 Author
 ------