diff options
Diffstat (limited to 'Documentation/git-filter-branch.txt')
| -rw-r--r-- | Documentation/git-filter-branch.txt | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt index 543a1cf105..2a78549be5 100644 --- a/Documentation/git-filter-branch.txt +++ b/Documentation/git-filter-branch.txt @@ -25,7 +25,7 @@ Otherwise, all information (including original commit times or merge information) will be preserved. The command will only rewrite the _positive_ refs mentioned in the -command line (i.e. if you pass 'a..b', only 'b' will be rewritten). +command line (e.g. if you pass 'a..b', only 'b' will be rewritten). If you specify no filters, the commits will be recommitted without any changes, which would normally have no effect. Nevertheless, this may be useful in the future for compensating for some git bugs or such, @@ -42,7 +42,7 @@ Always verify that the rewritten version is correct: The original refs, if different from the rewritten ones, will be stored in the namespace 'refs/original/'. -Note that since this operation is extensively I/O expensive, it might +Note that since this operation is very I/O expensive, it might be a good idea to redirect the temporary directory off-disk with the '-d' option, e.g. on tmpfs. Reportedly the speedup is very noticeable. @@ -51,14 +51,15 @@ Filters ~~~~~~~ The filters are applied in the order as listed below. The <command> -argument is always evaluated in shell using the 'eval' command (with the -notable exception of the commit filter, for technical reasons). +argument is always evaluated in the shell context using the 'eval' command +(with the notable exception of the commit filter, for technical reasons). Prior to that, the $GIT_COMMIT environment variable will be set to contain the id of the commit being rewritten. Also, GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, GIT_AUTHOR_DATE, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL, -and GIT_COMMITTER_DATE are set according to the current commit. If any -evaluation of <command> returns a non-zero exit status, the whole operation -will be aborted. +and GIT_COMMITTER_DATE are set according to the current commit. The values +of these variables after the filters have run, are used for the new commit. +If any evaluation of <command> returns a non-zero exit status, the whole +operation will be aborted. A 'map' function is available that takes an "original sha1 id" argument and outputs a "rewritten sha1 id" if the commit has been already @@ -71,9 +72,9 @@ OPTIONS ------- --env-filter <command>:: - This is the filter for modifying the environment in which - the commit will be performed. Specifically, you might want - to rewrite the author/committer name/email/time environment + This filter may be used if you only need to modify the environment + in which the commit will be performed. Specifically, you might + want to rewrite the author/committer name/email/time environment variables (see linkgit:git-commit[1] for details). Do not forget to re-export the variables. @@ -149,7 +150,7 @@ definition impossible to preserve signatures at any rate.) -d <directory>:: Use this option to set the path to the temporary directory used for rewriting. When applying a tree filter, the command needs to - temporary checkout the tree to some directory, which may consume + temporarily check out the tree to some directory, which may consume considerable space in case of large projects. By default it does this in the '.git-rewrite/' directory but you can override that choice by this parameter. |