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author | Miklos Vajna <vmiklos@frugalware.org> | 2008-05-31 04:18:08 +0400 |
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committer | Junio C Hamano <gitster@pobox.com> | 2008-06-01 01:32:56 +0400 |
commit | c16570c42a748a29031281badd4762dd4e71d3d0 (patch) | |
tree | 178e8180d640ffd82da8e67b15ffc4bb37fb0d69 /Documentation | |
parent | 6ab69bf253848d641fb08348eca10b7cf79fd275 (diff) |
Revision walking documentation: document most important functions
Unfortunately the list is not complete, but includes the essential ones.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/technical/api-revision-walking.txt | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/Documentation/technical/api-revision-walking.txt b/Documentation/technical/api-revision-walking.txt index 01a24551af..996da0503a 100644 --- a/Documentation/technical/api-revision-walking.txt +++ b/Documentation/technical/api-revision-walking.txt @@ -1,9 +1,67 @@ revision walking API ==================== +The revision walking API offers functions to build a list of revisions +and then iterate over that list. + +Calling sequence +---------------- + +The walking API has a given calling sequence: first you need to +initialize a rev_info structure, then add revisions to control what kind +of revision list do you want to get, finally you can iterate over the +revision list. + +Functions +--------- + +`init_revisions`:: + + Initialize a rev_info structure with default values. The second + parameter may be NULL or can be prefix path, and then the `.prefix` + variable will be set to it. This is typically the first function you + want to call when you want to deal with a revision list. After calling + this function, you are free to customize options, like set + `.ignore_merges` to 0 if you don't want to ignore merges, and so on. See + `revision.h` for a complete list of available options. + +`add_pending_object`:: + + This function can be used if you want to add commit objects as revision + information. You can use the `UNINTERESTING` object flag to indicate if + you want to include or exclude the given commit (and commits reachable + from the given commit) from the revision list. ++ +NOTE: If you have the commits as a string list then you probably want to +use setup_revisions(), instead of parsing each string and using this +function. + +`setup_revisions`:: + + Parse revision information, filling in the `rev_info` structure, and + removing the used arguments from the argument list. Returns the number + of arguments left that weren't recognized, which are also moved to the + head of the argument list. The last parameter is used in case no + parameter given by the first two arguments. + +`prepare_revision_walk`:: + + Prepares the rev_info structure for a walk. You should check if it + returns any error (non-zero return code) and if it does not, you can + start using get_revision() to do the iteration. + +`get_revision`:: + + Takes a pointer to a `rev_info` structure and iterates over it, + returning a `struct commit *` each time you call it. The end of the + revision list is indicated by returning a NULL pointer. + +Data structures +--------------- + Talk about <revision.h>, things like: * two diff_options, one for path limiting, another for output; -* calling sequence: init_revisions(), setup_revsions(), get_revision(); +* remaining functions; (Linus, JC, Dscho) |