Fits --simplify-merges documentation into the 'History Simplification' section, including example. Signed-off-by: Thomas Rast <trast@xxxxxxxxxxxxxxx> --- Documentation/rev-list-options.txt | 48 +++++++++++++++++++++++++++++++---- 1 files changed, 42 insertions(+), 6 deletions(-) diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt index c6b0bf1..1d0048e 100644 --- a/Documentation/rev-list-options.txt +++ b/Documentation/rev-list-options.txt @@ -193,12 +193,6 @@ endif::git-rev-list[] Stop when a given path disappears from the tree. ---simplify-merges:: - - Simplify away commits that did not change the given paths, similar - to `--full-history`, and further remove merges none of whose - parent history changes the given paths. - --no-merges:: Do not print commits with more than one parent. @@ -414,6 +408,48 @@ Note that without '\--full-history', this still simplifies merges: if one of the parents is TREESAME, we follow only that one, so the other sides of the merge are never walked. +Finally, there is a fourth simplification mode available: + +--simplify-merges:: + + First, build a history graph in the same way that + '\--full-history' with parent rewriting does (see above). ++ +Then simplify each commit `C` to its replacement `C'` in the final +history according to the following rules: ++ +-- +* Set `C'` to `C`. ++ +* Replace each parent `P` of `C'` with its simplification `P'`. In + the process, drop parents that are ancestors of other parents, and + remove duplicates. ++ +* If after this parent rewriting, `C'` is a root or merge commit (has + zero or >1 parents), a boundary commit, or !TREESAME, it remains. + Otherwise, it is replaced with its only parent. +-- ++ +The effect of this is best shown by way of comparing to +'\--full-history' with parent rewriting. The example turns into: ++ +----------------------------------------------------------------------- + .-A---M---N---O + / / / + I B D + \ / / + `---------' +----------------------------------------------------------------------- ++ +Note the major differences in `N` and `P` over '\--full-history': ++ +-- +* `N`'s parent list had `I` removed, because it is an ancestor of the + other parent `M`. Still, `N` remained because it is !TREESAME. ++ +* `P`'s parent list similarly had `I` removed. `P` was then + removed completely, because it had one parent and is TREESAME. +-- ifdef::git-rev-list[] Bisection Helpers -- 1.6.0.rc2.56.g86ca -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
