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git/Documentation/git-notes.txt
Johan Herland 809f38c8ab git notes merge: Manual conflict resolution, part 1/2
Conflicts (that are to be resolved manually) are written into a special-
purpose working tree, located at .git/NOTES_MERGE_WORKTREE. Within this
directory, conflicting notes entries are stored (with conflict markers
produced by ll_merge()) using the SHA1 of the annotated object. The
.git/NOTES_MERGE_WORKTREE directory will only contain the _conflicting_
note entries. The non-conflicting note entries (aka. the partial merge
result) are stored in 'local_tree', and the SHA1 of the resulting commit
is written to 'result_sha1'. The return value from notes_merge() is -1.

The user is told to edit the files within the .git/NOTES_MERGE_WORKTREE
directory in order to resolve the conflicts.

The patch also contains documentation and testcases for the correct setup
of .git/NOTES_MERGE_WORKTREE.

The next part will recombine the partial notes merge result with the
resolved conflicts in .git/NOTES_MERGE_WORKTREE to produce the complete
merge result.

This patch has been improved by the following contributions:
- Jonathan Nieder: Use trace_printf(...) instead of OUTPUT(o, 5, ...)

Thanks-to: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-17 13:22:49 -08:00

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git-notes(1)
============
NAME
----
git-notes - Add or inspect object notes
SYNOPSIS
--------
[verse]
'git notes' [list [<object>]]
'git notes' add [-f] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
'git notes' copy [-f] ( --stdin | <from-object> <to-object> )
'git notes' append [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
'git notes' edit [<object>]
'git notes' show [<object>]
'git notes' merge [-v | -q] [-s <strategy> ] <notes_ref>
'git notes' remove [<object>]
'git notes' prune [-n | -v]
DESCRIPTION
-----------
Adds, removes, or reads notes attached to objects, without touching
the objects themselves.
By default, notes are saved to and read from `refs/notes/commits`, but
this default can be overridden. See the OPTIONS, CONFIGURATION, and
ENVIRONMENT sections below. If this ref does not exist, it will be
quietly created when it is first needed to store a note.
A typical use of notes is to supplement a commit message without
changing the commit itself. Notes can be shown by 'git log' along with
the original commit message. To distinguish these notes from the
message stored in the commit object, the notes are indented like the
message, after an unindented line saying "Notes (<refname>):" (or
"Notes:" for `refs/notes/commits`).
To change which notes are shown by 'git log', see the
"notes.displayRef" configuration in linkgit:git-log[1].
See the "notes.rewrite.<command>" configuration for a way to carry
notes across commands that rewrite commits.
SUBCOMMANDS
-----------
list::
List the notes object for a given object. If no object is
given, show a list of all note objects and the objects they
annotate (in the format "<note object> <annotated object>").
This is the default subcommand if no subcommand is given.
add::
Add notes for a given object (defaults to HEAD). Abort if the
object already has notes (use `-f` to overwrite an
existing note).
copy::
Copy the notes for the first object onto the second object.
Abort if the second object already has notes, or if the first
object has none (use -f to overwrite existing notes to the
second object). This subcommand is equivalent to:
`git notes add [-f] -C $(git notes list <from-object>) <to-object>`
+
In `\--stdin` mode, take lines in the format
+
----------
<from-object> SP <to-object> [ SP <rest> ] LF
----------
+
on standard input, and copy the notes from each <from-object> to its
corresponding <to-object>. (The optional `<rest>` is ignored so that
the command can read the input given to the `post-rewrite` hook.)
append::
Append to the notes of an existing object (defaults to HEAD).
Creates a new notes object if needed.
edit::
Edit the notes for a given object (defaults to HEAD).
show::
Show the notes for a given object (defaults to HEAD).
merge::
Merge the given notes ref into the current notes ref.
This will try to merge the changes made by the given
notes ref (called "remote") since the merge-base (if
any) into the current notes ref (called "local").
+
If conflicts arise and a strategy for automatically resolving
conflicting notes (see the -s/--strategy option) is not given,
the "manual" resolver is used. This resolver checks out the
conflicting notes in a special worktree (`.git/NOTES_MERGE_WORKTREE`),
and instructs the user to manually resolve the conflicts there.
remove::
Remove the notes for a given object (defaults to HEAD).
This is equivalent to specifying an empty note message to
the `edit` subcommand.
prune::
Remove all notes for non-existing/unreachable objects.
OPTIONS
-------
-f::
--force::
When adding notes to an object that already has notes,
overwrite the existing notes (instead of aborting).
-m <msg>::
--message=<msg>::
Use the given note message (instead of prompting).
If multiple `-m` options are given, their values
are concatenated as separate paragraphs.
Lines starting with `#` and empty lines other than a
single line between paragraphs will be stripped out.
-F <file>::
--file=<file>::
Take the note message from the given file. Use '-' to
read the note message from the standard input.
Lines starting with `#` and empty lines other than a
single line between paragraphs will be stripped out.
-C <object>::
--reuse-message=<object>::
Take the note message from the given blob object (for
example, another note).
-c <object>::
--reedit-message=<object>::
Like '-C', but with '-c' the editor is invoked, so that
the user can further edit the note message.
--ref <ref>::
Manipulate the notes tree in <ref>. This overrides
'GIT_NOTES_REF' and the "core.notesRef" configuration. The ref
is taken to be in `refs/notes/` if it is not qualified.
-n::
--dry-run::
Do not remove anything; just report the object names whose notes
would be removed.
-s <strategy>::
--strategy=<strategy>::
When merging notes, resolve notes conflicts using the given
strategy. The following strategies are recognized: "manual"
(default), "ours", "theirs" and "union".
See the "NOTES MERGE STRATEGIES" section below for more
information on each notes merge strategy.
-q::
--quiet::
When merging notes, operate quietly.
-v::
--verbose::
When merging notes, be more verbose.
When pruning notes, report all object names whose notes are
removed.
DISCUSSION
----------
Commit notes are blobs containing extra information about an object
(usually information to supplement a commit's message). These blobs
are taken from notes refs. A notes ref is usually a branch which
contains "files" whose paths are the object names for the objects
they describe, with some directory separators included for performance
reasons footnote:[Permitted pathnames have the form
'ab'`/`'cd'`/`'ef'`/`'...'`/`'abcdef...': a sequence of directory
names of two hexadecimal digits each followed by a filename with the
rest of the object ID.].
Every notes change creates a new commit at the specified notes ref.
You can therefore inspect the history of the notes by invoking, e.g.,
`git log -p notes/commits`. Currently the commit message only records
which operation triggered the update, and the commit authorship is
determined according to the usual rules (see linkgit:git-commit[1]).
These details may change in the future.
It is also permitted for a notes ref to point directly to a tree
object, in which case the history of the notes can be read with
`git log -p -g <refname>`.
NOTES MERGE STRATEGIES
----------------------
The default notes merge strategy is "manual", which checks out
conflicting notes in a special work tree for resolving notes conflicts
(`.git/NOTES_MERGE_WORKTREE`), and instructs the user to resolve the
conflicts in that work tree.
"ours" automatically resolves conflicting notes in favor of the local
version (i.e. the current notes ref).
"theirs" automatically resolves notes conflicts in favor of the remote
version (i.e. the given notes ref being merged into the current notes
ref).
"union" automatically resolves notes conflicts by concatenating the
local and remote versions.
EXAMPLES
--------
You can use notes to add annotations with information that was not
available at the time a commit was written.
------------
$ git notes add -m 'Tested-by: Johannes Sixt <j6t@kdbg.org>' 72a144e2
$ git show -s 72a144e
[...]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Notes:
Tested-by: Johannes Sixt <j6t@kdbg.org>
------------
In principle, a note is a regular Git blob, and any kind of
(non-)format is accepted. You can binary-safely create notes from
arbitrary files using 'git hash-object':
------------
$ cc *.c
$ blob=$(git hash-object -w a.out)
$ git notes --ref=built add -C "$blob" HEAD
------------
Of course, it doesn't make much sense to display non-text-format notes
with 'git log', so if you use such notes, you'll probably need to write
some special-purpose tools to do something useful with them.
CONFIGURATION
-------------
core.notesRef::
Notes ref to read and manipulate instead of
`refs/notes/commits`. Must be an unabbreviated ref name.
This setting can be overridden through the environment and
command line.
notes.displayRef::
Which ref (or refs, if a glob or specified more than once), in
addition to the default set by `core.notesRef` or
'GIT_NOTES_REF', to read notes from when showing commit
messages with the 'git log' family of commands.
This setting can be overridden on the command line or by the
'GIT_NOTES_DISPLAY_REF' environment variable.
See linkgit:git-log[1].
notes.rewrite.<command>::
When rewriting commits with <command> (currently `amend` or
`rebase`), if this variable is `false`, git will not copy
notes from the original to the rewritten commit. Defaults to
`true`. See also "`notes.rewriteRef`" below.
+
This setting can be overridden by the 'GIT_NOTES_REWRITE_REF'
environment variable.
notes.rewriteMode::
When copying notes during a rewrite, what to do if the target
commit already has a note. Must be one of `overwrite`,
`concatenate`, and `ignore`. Defaults to `concatenate`.
+
This setting can be overridden with the `GIT_NOTES_REWRITE_MODE`
environment variable.
notes.rewriteRef::
When copying notes during a rewrite, specifies the (fully
qualified) ref whose notes should be copied. May be a glob,
in which case notes in all matching refs will be copied. You
may also specify this configuration several times.
+
Does not have a default value; you must configure this variable to
enable note rewriting.
+
Can be overridden with the 'GIT_NOTES_REWRITE_REF' environment variable.
ENVIRONMENT
-----------
'GIT_NOTES_REF'::
Which ref to manipulate notes from, instead of `refs/notes/commits`.
This overrides the `core.notesRef` setting.
'GIT_NOTES_DISPLAY_REF'::
Colon-delimited list of refs or globs indicating which refs,
in addition to the default from `core.notesRef` or
'GIT_NOTES_REF', to read notes from when showing commit
messages.
This overrides the `notes.displayRef` setting.
+
A warning will be issued for refs that do not exist, but a glob that
does not match any refs is silently ignored.
'GIT_NOTES_REWRITE_MODE'::
When copying notes during a rewrite, what to do if the target
commit already has a note.
Must be one of `overwrite`, `concatenate`, and `ignore`.
This overrides the `core.rewriteMode` setting.
'GIT_NOTES_REWRITE_REF'::
When rewriting commits, which notes to copy from the original
to the rewritten commit. Must be a colon-delimited list of
refs or globs.
+
If not set in the environment, the list of notes to copy depends
on the `notes.rewrite.<command>` and `notes.rewriteRef` settings.
Author
------
Written by Johannes Schindelin <johannes.schindelin@gmx.de> and
Johan Herland <johan@herland.net>
Documentation
-------------
Documentation by Johannes Schindelin and Johan Herland
GIT
---
Part of the linkgit:git[7] suite