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| author | Junio C Hamano <junkio@cox.net> | 2006-09-27 01:58:57 -0700 |
|---|---|---|
| committer | Junio C Hamano <junkio@cox.net> | 2006-09-27 02:01:42 -0700 |
| commit | ac5409e420e5fdd7c4a381f873ffcedfb83d7117 (patch) | |
| tree | eae6bec434639c43b324005b5c0b88bfe5889834 /Documentation/git-update-ref.txt | |
| parent | 4431fcc4b134ae501e3e57dc568ae4f031e57898 (diff) | |
| download | git-ac5409e420e5fdd7c4a381f873ffcedfb83d7117.tar.gz | |
update-ref: -d flag and ref creation safety.
This adds -d flag to update-ref to allow safe deletion of ref.
Before deleting it, the command checks if the given <oldvalue>
still matches the value the caller thought the ref contained.
Similarly, it also accepts 0{40} or an empty string as <oldvalue>
to allow safe creation of a new ref.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'Documentation/git-update-ref.txt')
| -rw-r--r-- | Documentation/git-update-ref.txt | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt index e062030e91..71bcb7954f 100644 --- a/Documentation/git-update-ref.txt +++ b/Documentation/git-update-ref.txt @@ -7,7 +7,7 @@ git-update-ref - update the object name stored in a ref safely SYNOPSIS -------- -'git-update-ref' [-m <reason>] <ref> <newvalue> [<oldvalue>] +'git-update-ref' [-m <reason>] (-d <ref> <oldvalue> | <ref> <newvalue> [<oldvalue>]) DESCRIPTION ----------- @@ -20,7 +20,9 @@ possibly dereferencing the symbolic refs, after verifying that the current value of the <ref> matches <oldvalue>. E.g. `git-update-ref refs/heads/master <newvalue> <oldvalue>` updates the master branch head to <newvalue> only if its current -value is <oldvalue>. +value is <oldvalue>. You can specify 40 "0" or an empty string +as <oldvalue> to make sure that the ref you are creating does +not exist. It also allows a "ref" file to be a symbolic pointer to another ref file by starting with the four-byte header sequence of @@ -49,6 +51,10 @@ for reading but not for writing (so we'll never write through a ref symlink to some other tree, if you have copied a whole archive by creating a symlink tree). +With `-d` flag, it deletes the named <ref> after verifying it +still contains <oldvalue>. + + Logging Updates --------------- If config parameter "core.logAllRefUpdates" is true or the file |