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Mirror of https://github.com/git/git
6546b5931e
The --full-history traversal keeps all merges in addition to non-merge
commits that touch paths in the given pathspec. This is useful to view
both sides of a merge in a topology like this:
A---M---o
/ /
---O---B
even when A and B makes identical change to the given paths. The revision
traversal without --full-history aims to come up with the simplest history
to explain the final state of the tree, and one of the side branches can
be pruned away.
The behaviour to keep all merges however is inconvenient if neither A nor
B touches the paths we are interested in. --full-history reduces the
topology to:
---O---M---o
in such a case, without removing M.
This adds a post processing phase on top of --full-history traversal to
remove needless merges from the resulting history.
The idea is to compute, for each commit in the "full history" result set,
the commit that should replace it in the simplified history. The commit
to replace it in the final history is determined as follows:
* In any case, we first figure out the replacement commits of parents of
the commit we are looking at. The commit we are looking at is
rewritten as if the replacement commits of its original parents are its
parents. While doing so, we reduce the redundant parents from the
rewritten parent list by not just removing the identical ones, but also
removing a parent that is an ancestor of another parent.
* After the above parent simplification, if the commit is a root commit,
an UNINTERESTING commit, a merge commit, or modifies the paths we are
interested in, then the replacement commit of the commit is itself. In
other words, such a commit is not dropped from the final result.
The first point above essentially means that the history is rewritten in
the bottom up direction. We can rewrite the parent list of a commit only
after we know how all of its parents are rewritten. This means that the
processing needs to happen on the full history (i.e. after limit_list()).
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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| arm | ||
| compat | ||
| contrib | ||
| Documentation | ||
| git-gui | ||
| gitk-git | ||
| gitweb | ||
| mozilla-sha1 | ||
| perl | ||
| ppc | ||
| t | ||
| templates | ||
| xdiff | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| abspath.c | ||
| alias.c | ||
| alloc.c | ||
| archive-tar.c | ||
| archive-zip.c | ||
| archive.c | ||
| archive.h | ||
| attr.c | ||
| attr.h | ||
| base85.c | ||
| blob.c | ||
| blob.h | ||
| branch.c | ||
| branch.h | ||
| builtin-add.c | ||
| builtin-annotate.c | ||
| builtin-apply.c | ||
| builtin-archive.c | ||
| builtin-blame.c | ||
| builtin-branch.c | ||
| builtin-bundle.c | ||
| builtin-cat-file.c | ||
| builtin-check-attr.c | ||
| builtin-check-ref-format.c | ||
| builtin-checkout-index.c | ||
| builtin-checkout.c | ||
| builtin-clean.c | ||
| builtin-clone.c | ||
| builtin-commit-tree.c | ||
| builtin-commit.c | ||
| builtin-config.c | ||
| builtin-count-objects.c | ||
| builtin-describe.c | ||
| builtin-diff-files.c | ||
| builtin-diff-index.c | ||
| builtin-diff-tree.c | ||
| builtin-diff.c | ||
| builtin-fast-export.c | ||
| builtin-fetch--tool.c | ||
| builtin-fetch-pack.c | ||
| builtin-fetch.c | ||
| builtin-fmt-merge-msg.c | ||
| builtin-for-each-ref.c | ||
| builtin-fsck.c | ||
| builtin-gc.c | ||
| builtin-grep.c | ||
| builtin-http-fetch.c | ||
| builtin-init-db.c | ||
| builtin-log.c | ||
| builtin-ls-files.c | ||
| builtin-ls-remote.c | ||
| builtin-ls-tree.c | ||
| builtin-mailinfo.c | ||
| builtin-mailsplit.c | ||
| builtin-merge-base.c | ||
| builtin-merge-file.c | ||
| builtin-merge-ours.c | ||
| builtin-merge-recursive.c | ||
| builtin-merge.c | ||
| builtin-mv.c | ||
| builtin-name-rev.c | ||
| builtin-pack-objects.c | ||
| builtin-pack-refs.c | ||
| builtin-prune-packed.c | ||
| builtin-prune.c | ||
| builtin-push.c | ||
| builtin-read-tree.c | ||
| builtin-reflog.c | ||
| builtin-remote.c | ||
| builtin-rerere.c | ||
| builtin-reset.c | ||
| builtin-rev-list.c | ||
| builtin-rev-parse.c | ||
| builtin-revert.c | ||
| builtin-rm.c | ||
| builtin-send-pack.c | ||
| builtin-shortlog.c | ||
| builtin-show-branch.c | ||
| builtin-show-ref.c | ||
| builtin-stripspace.c | ||
| builtin-symbolic-ref.c | ||
| builtin-tag.c | ||
| builtin-tar-tree.c | ||
| builtin-unpack-objects.c | ||
| builtin-update-index.c | ||
| builtin-update-ref.c | ||
| builtin-upload-archive.c | ||
| builtin-verify-pack.c | ||
| builtin-verify-tag.c | ||
| builtin-write-tree.c | ||
| builtin.h | ||
| bundle.c | ||
| bundle.h | ||
| cache-tree.c | ||
| cache-tree.h | ||
| cache.h | ||
| check-builtins.sh | ||
| check-racy.c | ||
| check_bindir | ||
| color.c | ||
| color.h | ||
| combine-diff.c | ||
| command-list.txt | ||
| commit.c | ||
| commit.h | ||
| config.c | ||
| config.mak.in | ||
| configure.ac | ||
| connect.c | ||
| convert.c | ||
| copy.c | ||
| COPYING | ||
| csum-file.c | ||
| csum-file.h | ||
| ctype.c | ||
| daemon.c | ||
| date.c | ||
| decorate.c | ||
| decorate.h | ||
| delta.h | ||
| diff-delta.c | ||
| diff-lib.c | ||
| diff-no-index.c | ||
| diff.c | ||
| diff.h | ||
| diffcore-break.c | ||
| diffcore-delta.c | ||
| diffcore-order.c | ||
| diffcore-pickaxe.c | ||
| diffcore-rename.c | ||
| diffcore.h | ||
| dir.c | ||
| dir.h | ||
| dump-cache-tree.c | ||
| editor.c | ||
| entry.c | ||
| environment.c | ||
| exec_cmd.c | ||
| exec_cmd.h | ||
| fast-import.c | ||
| fetch-pack.h | ||
| fixup-builtins | ||
| fsck.c | ||
| fsck.h | ||
| generate-cmdlist.sh | ||
| git-add--interactive.perl | ||
| git-am.sh | ||
| git-archimport.perl | ||
| git-bisect.sh | ||
| git-compat-util.h | ||
| git-cvsexportcommit.perl | ||
| git-cvsimport.perl | ||
| git-cvsserver.perl | ||
| git-filter-branch.sh | ||
| git-instaweb.sh | ||
| git-lost-found.sh | ||
| git-merge-octopus.sh | ||
| git-merge-one-file.sh | ||
| git-merge-resolve.sh | ||
| git-mergetool.sh | ||
| git-parse-remote.sh | ||
| git-pull.sh | ||
| git-quiltimport.sh | ||
| git-rebase--interactive.sh | ||
| git-rebase.sh | ||
| git-relink.perl | ||
| git-repack.sh | ||
| git-request-pull.sh | ||
| git-send-email.perl | ||
| git-sh-setup.sh | ||
| git-stash.sh | ||
| git-submodule.sh | ||
| git-svn.perl | ||
| GIT-VERSION-GEN | ||
| git-web--browse.sh | ||
| git.c | ||
| git.spec.in | ||
| graph.c | ||
| graph.h | ||
| grep.c | ||
| grep.h | ||
| hash-object.c | ||
| hash.c | ||
| hash.h | ||
| help.c | ||
| http-push.c | ||
| http-walker.c | ||
| http.c | ||
| http.h | ||
| ident.c | ||
| imap-send.c | ||
| index-pack.c | ||
| INSTALL | ||
| interpolate.c | ||
| interpolate.h | ||
| list-objects.c | ||
| list-objects.h | ||
| ll-merge.c | ||
| ll-merge.h | ||
| lockfile.c | ||
| log-tree.c | ||
| log-tree.h | ||
| mailmap.c | ||
| mailmap.h | ||
| Makefile | ||
| match-trees.c | ||
| merge-file.c | ||
| merge-index.c | ||
| merge-recursive.h | ||
| merge-tree.c | ||
| mktag.c | ||
| mktree.c | ||
| name-hash.c | ||
| object.c | ||
| object.h | ||
| pack-check.c | ||
| pack-redundant.c | ||
| pack-refs.c | ||
| pack-refs.h | ||
| pack-revindex.c | ||
| pack-revindex.h | ||
| pack-write.c | ||
| pack.h | ||
| pager.c | ||
| parse-options.c | ||
| parse-options.h | ||
| patch-delta.c | ||
| patch-id.c | ||
| patch-ids.c | ||
| patch-ids.h | ||
| path.c | ||
| pkt-line.c | ||
| pkt-line.h | ||
| pretty.c | ||
| progress.c | ||
| progress.h | ||
| quote.c | ||
| quote.h | ||
| reachable.c | ||
| reachable.h | ||
| read-cache.c | ||
| README | ||
| receive-pack.c | ||
| reflog-walk.c | ||
| reflog-walk.h | ||
| refs.c | ||
| refs.h | ||
| RelNotes | ||
| remote.c | ||
| remote.h | ||
| rerere.c | ||
| rerere.h | ||
| revision.c | ||
| revision.h | ||
| run-command.c | ||
| run-command.h | ||
| send-pack.h | ||
| server-info.c | ||
| setup.c | ||
| sha1-lookup.c | ||
| sha1-lookup.h | ||
| sha1_file.c | ||
| sha1_name.c | ||
| shallow.c | ||
| shell.c | ||
| shortlog.h | ||
| show-index.c | ||
| sideband.c | ||
| sideband.h | ||
| strbuf.c | ||
| strbuf.h | ||
| string-list.c | ||
| string-list.h | ||
| symlinks.c | ||
| tag.c | ||
| tag.h | ||
| tar.h | ||
| test-chmtime.c | ||
| test-date.c | ||
| test-delta.c | ||
| test-genrandom.c | ||
| test-match-trees.c | ||
| test-parse-options.c | ||
| test-path-utils.c | ||
| test-sha1.c | ||
| test-sha1.sh | ||
| thread-utils.c | ||
| thread-utils.h | ||
| trace.c | ||
| transport.c | ||
| transport.h | ||
| tree-diff.c | ||
| tree-walk.c | ||
| tree-walk.h | ||
| tree.c | ||
| tree.h | ||
| unpack-file.c | ||
| unpack-trees.c | ||
| unpack-trees.h | ||
| update-server-info.c | ||
| upload-pack.c | ||
| usage.c | ||
| utf8.c | ||
| utf8.h | ||
| var.c | ||
| walker.c | ||
| walker.h | ||
| wrapper.c | ||
| write_or_die.c | ||
| ws.c | ||
| wt-status.c | ||
| wt-status.h | ||
| xdiff-interface.c | ||
| xdiff-interface.h | ||
//////////////////////////////////////////////////////////////// GIT - the stupid content tracker //////////////////////////////////////////////////////////////// "git" can mean anything, depending on your mood. - random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant. - stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang. - "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room. - "goddamn idiotic truckload of sh*t": when it breaks Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals. Git is an Open Source project covered by the GNU General Public License. It was originally written by Linus Torvalds with help of a group of hackers around the net. It is currently maintained by Junio C Hamano. Please read the file INSTALL for installation instructions. See Documentation/tutorial.txt to get started, then see Documentation/everyday.txt for a useful minimum set of commands, and "man git-commandname" for documentation of each command. CVS users may also want to read Documentation/cvs-migration.txt. Many Git online resources are accessible from http://git.or.cz/ including full documentation and Git related tools. The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org. To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org. The mailing list archives are available at http://marc.theaimsgroup.com/?l=git and other archival sites. The messages titled "A note from the maintainer", "What's in git.git (stable)" and "What's cooking in git.git (topics)" and the discussion following them on the mailing list give a good reference for project status, development direction and remaining tasks.