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-rw-r--r--rev-list-options.txt46
1 files changed, 35 insertions, 11 deletions
diff --git a/rev-list-options.txt b/rev-list-options.txt
index bd08d1857..183750956 100644
--- a/rev-list-options.txt
+++ b/rev-list-options.txt
@@ -392,12 +392,14 @@ Default mode::
merges from the resulting history, as there are no selected
commits contributing to this merge.
---ancestry-path::
+--ancestry-path[=<commit>]::
When given a range of commits to display (e.g. 'commit1..commit2'
- or 'commit2 {caret}commit1'), only display commits that exist
- directly on the ancestry chain between the 'commit1' and
- 'commit2', i.e. commits that are both descendants of 'commit1',
- and ancestors of 'commit2'.
+ or 'commit2 {caret}commit1'), only display commits in that range
+ that are ancestors of <commit>, descendants of <commit>, or
+ <commit> itself. If no commit is specified, use 'commit1' (the
+ excluded part of the range) as <commit>. Can be passed multiple
+ times; if so, a commit is included if it is any of the commits
+ given or if it is an ancestor or descendant of one of them.
A more detailed explanation follows.
@@ -571,11 +573,10 @@ Note the major differences in `N`, `P`, and `Q` over `--full-history`:
There is another simplification mode available:
---ancestry-path::
- Limit the displayed commits to those directly on the ancestry
- chain between the ``from'' and ``to'' commits in the given commit
- range. I.e. only display commits that are ancestor of the ``to''
- commit and descendants of the ``from'' commit.
+--ancestry-path[=<commit>]::
+ Limit the displayed commits to those which are an ancestor of
+ <commit>, or which are a descendant of <commit>, or are <commit>
+ itself.
+
As an example use case, consider the following commit history:
+
@@ -607,6 +608,29 @@ option does. Applied to the 'D..M' range, it results in:
\
L--M
-----------------------------------------------------------------------
++
+We can also use `--ancestry-path=D` instead of `--ancestry-path` which
+means the same thing when applied to the 'D..M' range but is just more
+explicit.
++
+If we instead are interested in a given topic within this range, and all
+commits affected by that topic, we may only want to view the subset of
+`D..M` which contain that topic in their ancestry path. So, using
+`--ancestry-path=H D..M` for example would result in:
++
+-----------------------------------------------------------------------
+ E
+ \
+ G---H---I---J
+ \
+ L--M
+-----------------------------------------------------------------------
++
+Whereas `--ancestry-path=K D..M` would result in
++
+-----------------------------------------------------------------------
+ K---------------L--M
+-----------------------------------------------------------------------
Before discussing another option, `--show-pulls`, we need to
create a new example history.
@@ -662,7 +686,7 @@ Here, the merge commits `O` and `P` contribute extra noise, as they did
not actually contribute a change to `file.txt`. They only merged a topic
that was based on an older version of `file.txt`. This is a common
issue in repositories using a workflow where many contributors work in
-parallel and merge their topic branches along a single trunk: manu
+parallel and merge their topic branches along a single trunk: many
unrelated merges appear in the `--full-history` results.
When using the `--simplify-merges` option, the commits `O` and `P`