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2010-12-08Merge branch 'jh/notes-merge'Libravatar Junio C Hamano1-4/+43
* jh/notes-merge: (23 commits) Provide 'git merge --abort' as a synonym to 'git reset --merge' cmd_merge(): Parse options before checking MERGE_HEAD Provide 'git notes get-ref' to easily retrieve current notes ref git notes merge: Add testcases for merging notes trees at different fanouts git notes merge: Add another auto-resolving strategy: "cat_sort_uniq" git notes merge: --commit should fail if underlying notes ref has moved git notes merge: List conflicting notes in notes merge commit message git notes merge: Manual conflict resolution, part 2/2 git notes merge: Manual conflict resolution, part 1/2 Documentation: Preliminary docs on 'git notes merge' git notes merge: Add automatic conflict resolvers (ours, theirs, union) git notes merge: Handle real, non-conflicting notes merges builtin/notes.c: Refactor creation of notes commits. git notes merge: Initial implementation handling trivial merges only builtin/notes.c: Split notes ref DWIMmery into a separate function notes.c: Use two newlines (instead of one) when concatenating notes (trivial) t3303: Indent with tabs instead of spaces for consistency notes.h/c: Propagate combine_notes_fn return value to add_note() and beyond notes.h/c: Allow combine_notes functions to remove notes notes.c: Reorder functions in preparation for next commit ... Conflicts: builtin.h
2010-11-17git notes merge: Add another auto-resolving strategy: "cat_sort_uniq"Libravatar Johan Herland1-0/+1
This new strategy is similar to "concatenate", but in addition to concatenating the two note candidates, this strategy sorts the resulting lines, and removes duplicate lines from the result. This is equivalent to applying the "cat | sort | uniq" shell pipeline to the two note candidates. This strategy is useful if the notes follow a line-based format where one wants to avoid duplicate lines in the merge result. Note that if either of the note candidates contain duplicate lines _prior_ to the merge, these will also be removed by this merge strategy. The patch also contains tests and documentation for the new strategy. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-17notes.h/c: Propagate combine_notes_fn return value to add_note() and beyondLibravatar Johan Herland1-3/+8
The combine_notes_fn functions uses a non-zero return value to indicate failure. However, this return value was converted to a call to die() in note_tree_insert(). Instead, propagate this return value out to add_note(), and return it from there to enable the caller to handle errors appropriately. Existing add_note() callers are updated to die() upon failure, thus preserving the current behaviour. The only exceptions are copy_note() and notes_cache_put() where we are able to propagate the add_note() return value instead. This patch has been improved by the following contributions: - Jonathan Nieder: Future-proof by always checking add_note() return value - Jonathan Nieder: Improve clarity of final if-condition in note_tree_insert() Thanks-to: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-10notes.h/c: Allow combine_notes functions to remove notesLibravatar Johan Herland1-1/+15
Allow combine_notes functions to request that a note be removed, by setting the resulting note SHA1 to null_sha1 (0000000...). For consistency, also teach note_tree_insert() to skip insertion of an empty note (a note with entry->val_sha1 equal to null_sha1) when there is no note to combine it with. In general, an empty note (null_sha1) is treated identically to no note at all, but when adding an empty note where there already exists a non-empty note, we allow the combine_notes function to potentially record a new/changed note. Document this behaviour, and clearly specify how combine_notes functions are expected to handle null_sha1 in input. Before this patch, storing null_sha1s in the notes tree were silently allowed, causing an invalid notes tree (referring to blobs with null_sha1) to be produced by write_notes_tree(). Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-10notes.h: Make default_notes_ref() available in notes APILibravatar Johan Herland1-0/+14
Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-10(trivial) notes.h: Minor documentation fixes to copy_notes()Libravatar Johan Herland1-0/+5
Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-31notes: Don't create (empty) commit when removing non-existing notesLibravatar Johan Herland1-1/+3
Extend remove_note() in the notes API to return whether or not a note was actually removed. Use this in 'git notes remove' to skip the creation of a notes commit when no notes were actually removed. Also add a test illustrating the change in behavior. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-25Merge branch 'maint'Libravatar Junio C Hamano1-2/+2
* maint: msvc: Fix some compiler warnings Documentation: grep: fix asciidoc problem with -- msvc: Fix some "expr evaluates to function" compiler warnings
2010-06-24msvc: Fix some "expr evaluates to function" compiler warningsLibravatar Ramsay Jones1-2/+2
In particular, the following warning is issued while compiling notes.c: notes.c(927) : warning C4550: expression evaluates to a \ function which is missing an argument list along with identical warnings on lines 928, 1016 and 1017. In order to suppress the warning, we change the definition of combine_notes_fn, so that the symbol type is an (explicit) "pointer to function ...". As a result, several other declarations need some minor fix-up to take account of the new typedef. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-05-19notes: dry-run and verbose options for pruneLibravatar Michael J Gruber1-1/+4
Introduce -n and -v options for "git notes prune" in complete analogy to "git prune" so that one can check for dangling notes easily. The output is a list of names of objects whose notes would be resp. are removed so that one can check the object ("git show sha1") as well as the note ("git notes show sha1"). Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-04-06notes.h: declare bit field as unsigned to silence compiler complaintsLibravatar Brandon Casey1-1/+1
The IRIX MIPSPro compiler complains like this: cc-1107 c99: WARNING File = notes.h, Line = 215 A signed bit field has a length of 1 bit. int suppress_default_notes:1; ^ 'unsigned' is what was intended, so lets make it so. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-12notes: track whether notes_trees were changed at allLibravatar Thomas Rast1-0/+1
Currently, the notes copying is a bit wasteful since it always creates new trees, even if no notes were copied at all. Teach add_note() and remove_note() to flag the affected notes tree as changed ('dirty'). Then teach builtin/notes.c to use this knowledge and avoid committing trees that weren't changed. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-12notes: implement 'git notes copy --stdin'Libravatar Thomas Rast1-0/+9
This implements a mass-copy command that takes a sequence of lines in the format <from-sha1> SP <to-sha1> [ SP <rest> ] LF on stdin, and copies each <from-sha1>'s notes to the <to-sha1>. The <rest> is ignored. The intent, of course, is that this can read the same input that the 'post-rewrite' hook gets. The copy_note() function is exposed for everyone's and in particular the next commit's use. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-12Support showing notes from more than one notes treeLibravatar Thomas Rast1-0/+55
With this patch, you can set notes.displayRef to a glob that points at your favourite notes refs, e.g., [notes] displayRef = refs/notes/* Then git-log and friends will show notes from all trees. Thanks to Junio C Hamano for lots of feedback, which greatly influenced the design of the entire series and this commit in particular. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: prune_notes(): Prune notes that belong to non-existing objectsLibravatar Johan Herland1-0/+12
When an object is made unreachable by Git, any notes that annotate that object are not automagically made unreachable, since all notes are always trivially reachable from a notes ref. In order to remove notes for non-existing objects, we therefore need to add functionality for traversing the notes tree and explicitly removing references to notes that annotate non-reachable objects. Thus the notes objects themselves also become unreachable, and are removed by a later garbage collect. prune_notes() performs this traversal (by using for_each_note() internally), and removes the notes in question from the notes tree. Note that the effect of prune_notes() is not persistent unless a subsequent call to write_notes_tree() is made. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Teach notes code to properly preserve non-notes in the notes treeLibravatar Johan Herland1-0/+1
The note tree structure allows for non-note entries to coexist with note entries in a notes tree. Although we certainly expect there to be very few non-notes in a notes tree, we should still support them to a certain degree. This patch teaches the notes code to preserve non-notes when updating the notes tree with write_notes_tree(). Non-notes are not affected by fanout restructuring. For non-notes to be handled correctly, we can no longer allow subtree entries that do not match the fanout structure produced by the notes code itself. This means that fanouts like 4/36, 6/34, 8/32, 4/4/32, etc. are no longer recognized as note subtrees; only 2-based fanouts are allowed (2/38, 2/2/36, 2/2/2/34, etc.). Since the notes code has never at any point _produced_ non-2-based fanouts, it is highly unlikely that this change will cause problems for anyone. The patch also adds some tests verifying the correct handling of non-notes in a notes tree. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Refactor notes concatenation into a flexible interface for combining notesLibravatar Johan Herland1-2/+32
When adding a note to an object that already has an existing note, the current solution is to concatenate the contents of the two notes. However, the caller may instead wish to _overwrite_ the existing note with the new note, or maybe even _ignore_ the new note, and keep the existing one. There might also be other ways of combining notes that are only known to the caller. Therefore, instead of unconditionally concatenating notes, we let the caller specify how to combine notes, by passing in a pointer to a function for combining notes. The caller may choose to implement its own function for notes combining, but normally one of the following three conveniently supplied notes combination functions will be sufficient: - combine_notes_concatenate() combines the two notes by appending the contents of the new note to the contents of the existing note. - combine_notes_overwrite() replaces the existing note with the new note. - combine_notes_ignore() keeps the existing note, and ignores the new note. A combine_notes function can be passed to init_notes() to choose a default combine_notes function for that notes tree. If NULL is given, the notes tree falls back to combine_notes_concatenate() as the ultimate default. A combine_notes function can also be passed directly to add_note(), to control the notes combining behaviour for a note addition in particular. If NULL is passed, the combine_notes function registered for the given notes tree is used. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: Allow multiple concurrent notes trees with new struct notes_treeLibravatar Johan Herland1-29/+52
The new struct notes_tree encapsulates access to a specific notes tree. It is provided to allow callers to make use of several different notes trees simultaneously. A struct notes_tree * parameter is added to every function in the notes API. In all cases, NULL can be passed, in which case the fallback "default" notes tree (default_notes_tree) is used. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: write_notes_tree(): Store the notes tree in the databaseLibravatar Johan Herland1-3/+35
Uses for_each_note() to traverse the notes tree, and produces tree objects on the fly representing the "on-disk" version of the notes tree with appropriate fanout. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: for_each_note(): Traverse the entire notes tree with a callbackLibravatar Johan Herland1-0/+47
This includes a first attempt at creating an optimal fanout scheme (which is calculated on-the-fly, while traversing). Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: get_note(): Return the note annotating the given objectLibravatar Johan Herland1-0/+7
Created by a simple cleanup and rename of lookup_notes(). Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: remove_note(): Remove note objects from the notes tree structureLibravatar Johan Herland1-0/+3
This includes adding internal functions for maintaining a healthy notes tree structure after removing individual notes. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: add_note(): Add note objects to the internal notes tree structureLibravatar Johan Herland1-0/+4
Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: init_notes(): Initialize the notes tree from the given notes refLibravatar Johan Herland1-0/+20
Created by a simple refactoring of initialize_notes(). Also add a new 'flags' parameter, which is a bitwise combination of notes initialization flags. For now, there is only one flag - NOTES_INIT_EMPTY - which indicates that the notes tree should not auto-load the contents of the given (or default) notes ref, but rather should leave the notes tree initialized to an empty state. This will become useful in the future when manipulating the notes tree through the notes API. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-13Notes API: get_commit_notes() -> format_note() + remove the commit restrictionLibravatar Johan Herland1-1/+10
There is really no reason why only commit objects can be annotated. By changing the struct commit parameter to get_commit_notes() into a sha1 we gain the ability to annotate any object type. To reflect this in the function naming as well, we rename get_commit_notes() to format_note(). This patch also fixes comments and variable names throughout notes.c as a consequence of the removal of the unnecessary 'commit' restriction. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-10-19Teach notes code to free its internal data structures on requestLibravatar Johan Herland1-0/+3
There's no need to be rude to memory-concious callers... This patch has been improved by the following contributions: - Junio C Hamano: avoid old-style declaration Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-10-19Add flags to get_commit_notes() to control the format of the note stringLibravatar Johan Herland1-1/+4
This patch adds the following flags to get_commit_notes() for adjusting the format of the produced note string: - NOTES_SHOW_HEADER: Print "Notes:" line before the notes contents - NOTES_INDENT: Indent notes contents by 4 spaces Suggested-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-10-19Introduce commit notesLibravatar Johannes Schindelin1-0/+7
Commit notes are blobs which are shown together with the commit message. These blobs are taken from the notes ref, which you can configure by the config variable core.notesRef, which in turn can be overridden by the environment variable GIT_NOTES_REF. The notes ref is a branch which contains "files" whose names are the names of the corresponding commits (i.e. the SHA-1). The rationale for putting this information into a ref is this: we want to be able to fetch and possibly union-merge the notes, maybe even look at the date when a note was introduced, and we want to store them efficiently together with the other objects. This patch has been improved by the following contributions: - Thomas Rast: fix core.notesRef documentation - Tor Arne Vestbø: fix printing of multi-line notes - Alex Riesen: Using char array instead of char pointer costs less BSS - Johan Herland: Plug leak when msg is good, but msglen or type causes return Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Tor Arne Vestbø <tavestbo@trolltech.com> Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com> get_commit_notes(): Plug memory leak when 'if' triggers, but not because of read_sha1_file() failure
2009-02-10Revert "Merge branch 'js/notes'"Libravatar Junio C Hamano1-7/+0
This reverts commit 7b75b331f6744fbf953fe8913703378ef86a2189, reversing changes made to 5d680a67d7909c89af96eba4a2d77abed606292b.
2008-12-21Introduce commit notesLibravatar Johannes Schindelin1-0/+7
Commit notes are blobs which are shown together with the commit message. These blobs are taken from the notes ref, which you can configure by the config variable core.notesRef, which in turn can be overridden by the environment variable GIT_NOTES_REF. The notes ref is a branch which contains "files" whose names are the names of the corresponding commits (i.e. the SHA-1). The rationale for putting this information into a ref is this: we want to be able to fetch and possibly union-merge the notes, maybe even look at the date when a note was introduced, and we want to store them efficiently together with the other objects. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>