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| author |  Junio C Hamano <junkio@cox.net> | 2006-07-06 22:37:51 -0700 |
|---|---|---|
| committer | Junio C Hamano <junkio@cox.net> | 2006-07-06 22:37:51 -0700 |
| commit | be4c7014f2f5945c59001297d2b0f282056f6d34 (patch) | |
| tree | 63af32223acc95533e8733902a5521f265ca963c /Documentation | |
| parent | show-branch: match documentation and usage (diff) | |
| download | tgif-be4c7014f2f5945c59001297d2b0f282056f6d34.tar.xz | |
rev-parse documentation: talk about range notation.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/git-rev-parse.txt | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt index 627cde8520..b761b4b965 100644 --- a/Documentation/git-rev-parse.txt +++ b/Documentation/git-rev-parse.txt @@ -156,11 +156,6 @@ syntax. and dereference the tag recursively until a non-tag object is found. -'git-rev-parse' also accepts a prefix '{caret}' to revision parameter, -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. @@ -168,9 +163,9 @@ left-to-right. G H I J \ / \ / D E F - \ | / - \ | / - \|/ + \ | / \ + \ | / | + \|/ | B C \ / \ / @@ -188,6 +183,40 @@ left-to-right. J = F^2 = B^3^2 = A^^3^2 +SPECIFYING RANGES +----------------- + +History traversing commands such as `git-log` operate on a set +of commits, not just a single commit. To these commands, +specifying a single revision with the notation described in the +previous section means the set of commits reachable from that +commit, following the commit ancestry chain. + +To exclude commits reachable from a commit, a prefix `{caret}` +notation is used. E.g. "`{caret}r1 r2`" means commits reachable +from `r2` but exclude the ones reachable from `r1`. + +This set operation appears so often that there is a shorthand +for it. "`r1..r2`" is equivalent to "`{caret}r1 r2`". It is +the difference of two sets (subtract the set of commits +reachable from `r1` from the set of commits reachable from +`r2`). + +A similar notation "`r1\...r2`" is called symmetric difference +of `r1` and `r2` and is defined as +"`r1 r2 --not $(git-merge-base --all r1 r2)`". +It it the set of commits that are reachable from either one of +`r1` or `r2` but not from both. + +Here are a few examples: + + D A B D + D F A B C D F + ^A G B D + ^A F B C F + G...I C D F G I + ^B G I C D F G I + Author ------ Written by Linus Torvalds <torvalds@osdl.org> and |