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2007-02-08log --reflog: use dwim_logLibravatar Johannes Schindelin1-0/+1
Since "git log origin/master" uses dwim_log() to match "refs/remotes/origin/master", it makes sense to do that for "git log --reflog", too. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-05Add pretend_sha1_file() interface.Libravatar Junio C Hamano1-0/+1
The new interface allows an application to temporarily hash a small number of objects and pretend that they are available in the object store without actually writing them. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-04Rename get_ident() to fmt_ident() and make it available to outsideLibravatar Junio C Hamano1-0/+1
This makes the functionality of ident.c::get_ident() available to other callers. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-28add logref support to git-symbolic-refLibravatar Nicolas Pitre1-1/+1
Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-28Don't force everybody to call setup_ident().Libravatar Junio C Hamano1-1/+0
Back when only handful commands that created commit and tag were the only users of committer identity information, it made sense to explicitly call setup_ident() to pre-fill the default value from the gecos information. But it is much simpler for programs to make the call automatic when get_ident() is called these days, since many more programs want to use the information when updating the reflog. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-25Allow non-developer to clone, checkout and fetch more easily.Libravatar Junio C Hamano1-1/+0
The code that uses committer_info() in reflog can barf and die whenever it is asked to update a ref. And I do not think calling ignore_missing_committer_name() upfront like recent receive-pack did in the aplication is a reasonable workaround. What the patch does. - git_committer_info() takes one parameter. It used to be "if this is true, then die() if the name is not available due to bad GECOS, otherwise issue a warning once but leave the name empty". The reason was because we wanted to prevent bad commits from being made by git-commit-tree (and its callers). The value 0 is only used by "git var -l". Now it takes -1, 0 or 1. When set to -1, it does not complain but uses the pw->pw_name when name is not available. Existing 0 and 1 values mean the same thing as they used to mean before. 0 means issue warnings and leave it empty, 1 means barf and die. - ignore_missing_committer_name() and its existing caller (receive-pack, to set the reflog) have been removed. - git-format-patch, to come up with the phoney message ID when asked to thread, now passes -1 to git_committer_info(). This codepath uses only the e-mail part, ignoring the name. It used to barf and die. The other call in the same program when asked to add signed-off-by line based on committer identity still passes 1 to make sure it barfs instead of adding a bogus s-o-b line. - log_ref_write in refs.c, to come up with the name to record who initiated the ref update in the reflog, passes -1. It used to barf and die. The last change means that git-update-ref, git-branch, and commit walker backends can now be used in a repository with reflog by somebody who does not have the user identity required to make a commit. They all used to barf and die. I've run tests and all of them seem to pass, and also tried "git clone" as a user whose GECOS is empty -- git clone works again now (it was broken when reflog was enabled by default). But this definitely needs extra sets of eyeballs. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-20Do not verify filenames in a bare repositoryLibravatar Johannes Schindelin1-0/+1
For example, it makes no sense to check the presence of a file named "HEAD" when calling "git log HEAD" in a bare repository. Noticed by Han-Wen Nienhuys. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
2007-01-19dwim_ref(): Separate name-to-ref DWIM code out.Libravatar Junio C Hamano1-0/+2
I'll be using this in another function to figure out what to pass to resolve_ref(). Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-18Use fixed-size integers for .idx file I/OLibravatar Junio C Hamano1-1/+1
This attempts to finish what Simon started in the previous commit. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-16cache.h; fix a couple of prototypesLibravatar Chris Wedgwood1-2/+2
Trivial patch. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-14Remove read_or_die in favor of better error messages.Libravatar Shawn O. Pearce1-1/+0
Originally I introduced read_or_die for the purpose of reading the pack header and trailer, and I was too lazy to print proper error messages. Linus Torvalds <torvalds@osdl.org>: > For a read error, at the very least you have to say WHICH FILE > couldn't be read, because it's usually a matter of some file just > being too short, not some system-wide problem. and of course Linus is right. Make it so. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-11Merge branch 'jc/bare'Libravatar Junio C Hamano1-1/+2
* jc/bare: Disallow working directory commands in a bare repository. git-fetch: allow updating the current branch in a bare repository. Introduce is_bare_repository() and core.bare configuration variable Move initialization of log_all_ref_updates
2007-01-11Merge branch 'jc/detached-head'Libravatar Junio C Hamano1-1/+1
* jc/detached-head: git-checkout: handle local changes sanely when detaching HEAD git-checkout: safety check for detached HEAD checks existing refs git-checkout: fix branch name output from the command git-checkout: safety when coming back from the detached HEAD state. git-checkout: rewording comments regarding detached HEAD. git-checkout: do not warn detaching HEAD when it is already detached. Detached HEAD (experimental) git-branch: show detached HEAD git-status: show detached HEAD
2007-01-08short i/o: fix calls to read to use xread or read_in_fullLibravatar Andy Whitcroft1-0/+1
We have a number of badly checked read() calls. Often we are expecting read() to read exactly the size we requested or fail, this fails to handle interrupts or short reads. Add a read_in_full() providing those semantics. Otherwise we at a minimum need to check for EINTR and EAGAIN, where this is appropriate use xread(). Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-08short i/o: clean up the naming for the write_{in,or}_xxx familyLibravatar Andy Whitcroft1-1/+2
We recently introduced a write_in_full() which would either write the specified object or emit an error message and fail. In order to fix the read side we now want to introduce a read_in_full() but without an error emit. This patch cleans up the naming of this family of calls: 1) convert the existing write_or_whine() to write_or_whine_pipe() to better indicate its pipe specific nature, 2) convert the existing write_in_full() calls to write_or_whine() to better indicate its nature, 3) introduce a write_in_full() providing a write or fail semantic, and 4) convert write_or_whine() and write_or_whine_pipe() to use write_in_full(). Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-08Detached HEAD (experimental)Libravatar Junio C Hamano1-1/+1
This allows "git checkout v1.4.3" to dissociate the HEAD of repository from any branch. After this point, "git branch" starts reporting that you are not on any branch. You can go back to an existing branch by saying "git checkout master", for example. This is still experimental. While I think it makes sense to allow commits on top of detached HEAD, it is rather dangerous unless you are careful in the current form. Next "git checkout master" will obviously lose what you have done, so we might want to require "git checkout -f" out of a detached HEAD if we find that the HEAD commit is not an ancestor of any other branches. There is no such safety valve implemented right now. On the other hand, the reason the user did not start the ad-hoc work on a new branch with "git checkout -b" was probably because the work was of a throw-away nature, so the convenience of not having that safety valve might be even better. The user, after accumulating some commits on top of a detached HEAD, can always create a new branch with "git checkout -b" not to lose useful work done while the HEAD was detached. We'll see. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-07Introduce is_bare_repository() and core.bare configuration variableLibravatar Junio C Hamano1-1/+2
This removes the old is_bare_git_dir(const char *) to ask if a directory, if it is a GIT_DIR, is a bare repository, and replaces it with is_bare_repository(void *). The function looks at core.bare configuration variable if exists but uses the old heuristics: if it is ".git" or ends with "/.git", then it does not look like a bare repository, otherwise it does. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-07Merge branch 'sp/mmap'Libravatar Junio C Hamano1-8/+20
* sp/mmap: (27 commits) Spell default packedgitlimit slightly differently Increase packedGit{Limit,WindowSize} on 64 bit systems. Update packedGit config option documentation. mmap: set FD_CLOEXEC for file descriptors we keep open for mmap() pack-objects: fix use of use_pack(). Fix random segfaults in pack-objects. Cleanup read_cache_from error handling. Replace mmap with xmmap, better handling MAP_FAILED. Release pack windows before reporting out of memory. Default core.packdGitWindowSize to 1 MiB if NO_MMAP. Test suite for sliding window mmap implementation. Create pack_report() as a debugging aid. Support unmapping windows on 'temporary' packfiles. Improve error message when packfile mmap fails. Ensure core.packedGitWindowSize cannot be less than 2 pages. Load core configuration in git-verify-pack. Fully activate the sliding window pack access. Unmap individual windows rather than entire files. Document why header parsing won't exceed a window. Loop over pack_windows when inflating/accessing data. ... Conflicts: cache.h pack-check.c
2007-01-04Merge branch 'maint'Libravatar Junio C Hamano1-0/+1
* maint: pack-check.c::verify_packfile(): don't run SHA-1 update on huge data Fix infinite loop when deleting multiple packed refs.
2007-01-03Fix infinite loop when deleting multiple packed refs.Libravatar Junio C Hamano1-0/+1
It was stupid to link the same element twice to lock_file_list and end up in a loop, so we certainly need a fix. But it is not like we are taking a lock on multiple files in this case. It is just that we leave the linked element on the list even after commit_lock_file() successfully removes the cruft. We cannot remove the list element in commit_lock_file(); if we are interrupted in the middle of list manipulation, the call to remove_lock_file_on_signal() will happen with a broken list structure pointed by lock_file_list, which would cause the cruft to remain, so not removing the list element is the right thing to do. Instead we should be reusing the element already on the list. There is already a code for that in lock_file() function in lockfile.c. The code checks lk->next and the element is linked only when it is not already on the list -- which is incorrect for the last element on the list (which has NULL in its next field), but if you read the check as "is this element already on the list?" it actually makes sense. We do not want to link it on the list again, nor we would want to set up signal/atexit over and over. Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-02send pack check for failure to send revisions listLibravatar Andy Whitcroft1-0/+1
When passing the revisions list to pack-objects we do not check for errors nor short writes. Introduce a new write_in_full which will handle short writes and report errors to the caller. Use this to short cut the send on failure, allowing us to wait for and report the child in case the failure is its fault. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Create pack_report() as a debugging aid.Libravatar Shawn O. Pearce1-0/+1
Much like the alloc_report() function can be useful to report on object allocation statistics while debugging the new pack_report() function can be useful to report on the behavior of the mmap window code used for packfile access. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Fully activate the sliding window pack access.Libravatar Shawn O. Pearce1-0/+1
This finally turns on the sliding window behavior for packfile data access by mapping limited size windows and chaining them under the packed_git->windows list. We consider a given byte offset to be within the window only if there would be at least 20 bytes (one hash worth of data) accessible after the requested offset. This range selection relates to the contract that use_pack() makes with its callers, allowing them to access one hash or one object header without needing to call use_pack() for every byte of data obtained. In the worst case scenario we will map the same page of data twice into memory: once at the end of one window and once again at the start of the next window. This duplicate page mapping will happen only when an object header or a delta base reference is spanned over the end of a window and is always limited to just one page of duplication, as no sane operating system will ever have a page size smaller than a hash. I am assuming that the possible wasted page of virtual address space is going to perform faster than the alternatives, which would be to copy the object header or ref delta into a temporary buffer prior to parsing, or to check the window range on every byte during header parsing. We may decide to revisit this decision in the future since this is just a gut instinct decision and has not actually been proven out by experimental testing. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Replace use_packed_git with window cursors.Libravatar Shawn O. Pearce1-2/+2
Part of the implementation concept of the sliding mmap window for pack access is to permit multiple windows per pack to be mapped independently. Since the inuse_cnt is associated with the mmap and not with the file, this value is in struct pack_window and needs to be incremented/decremented for each pack_window accessed by any code. To faciliate that implementation we need to replace all uses of use_packed_git() and unuse_packed_git() with a different API that follows struct pack_window objects rather than struct packed_git. The way this works is when we need to start accessing a pack for the first time we should setup a new window 'cursor' by declaring a local and setting it to NULL: struct pack_windows *w_curs = NULL; To obtain the memory region which contains a specific section of the pack file we invoke use_pack(), supplying the address of our current window cursor: unsigned int len; unsigned char *addr = use_pack(p, &w_curs, offset, &len); the returned address `addr` will be the first byte at `offset` within the pack file. The optional variable len will also be updated with the number of bytes remaining following the address. Multiple calls to use_pack() with the same window cursor will update the window cursor, moving it from one window to another when necessary. In this way each window cursor variable maintains only one struct pack_window inuse at a time. Finally before exiting the scope which originally declared the window cursor we must invoke unuse_pack() to unuse the current window (which may be different from the one that was first obtained from use_pack): unuse_pack(&w_curs); This implementation is still not complete with regards to multiple windows, as only one window per pack file is supported right now. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Refactor how we open pack files to prepare for multiple windows.Libravatar Shawn O. Pearce1-0/+1
To efficiently support mmaping of multiple regions of the same pack file we want to keep the pack's file descriptor open while we are actively working with that pack. So we are now keeping that file descriptor in packed_git.pack_fd and closing it only after we unmap the last window. This is going to increase the number of file descriptors that are in use at once, however that will be bounded by the total number of pack files present and therefore should not be very high. It is a small tradeoff which we may need to revisit after some testing can be done on various repositories and systems. For code clarity we also want to seperate out the implementation of how we open a pack file from the implementation which locates a suitable window (or makes a new one) from the given pack file. Since this is a rather large delta I'm taking advantage of doing it now, in a fairly isolated change. When we open a pack file we need to examine the header and trailer without having a mmap in place, as we may only need to mmap the middle section of this particular pack. Consequently the verification code has been refactored to make use of the new read_or_die function. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Create read_or_die utility routine.Libravatar Shawn O. Pearce1-0/+1
Like write_or_die read_or_die reads the entire length requested or it kills the current process with a die call. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Use off_t for index and pack file lengths.Libravatar Shawn O. Pearce1-2/+2
Since the index_size and pack_size members of struct packed_git are the lengths of those corresponding files we should use the off_t size of the operating system to store these file lengths, rather than an unsigned long. This would help in the future should we ever resurrect Junio's 64 bit index implementation. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Refactor packed_git to prepare for sliding mmap windows.Libravatar Shawn O. Pearce1-3/+10
The idea behind the sliding mmap window pack reader implementation is to have multiple mmap regions active against the same pack file, thereby allowing the process to mmap in only the active/hot sections of the pack and reduce overall virtual address space usage. To implement this we need to refactor the mmap related data (pack_base, pack_use_cnt) out of struct packed_git and move them into a new struct pack_window. We are refactoring the code to support a single struct pack_window per packfile, thereby emulating the prior behavior of mmap'ing the entire pack file. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Introduce new config option for mmap limit.Libravatar Shawn O. Pearce1-0/+1
Rather than hardcoding the maximum number of bytes which can be mmapped from pack files we should make this value configurable, allowing the end user to increase or decrease this limit on a per-repository basis depending on the size of the repository and the capabilities of their operating system. In general users should not need to manually tune such a low-level setting within the core code, but being able to artifically limit the number of bytes which we can mmap at once from pack files will make it easier to craft test cases for the new mmap sliding window implementation. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-29Replace unpack_entry_gently with unpack_entry.Libravatar Shawn O. Pearce1-1/+1
The unpack_entry_gently function currently has only two callers: the delta base resolution in sha1_file.c and the main loop of pack-check.c. Both of these must change to using unpack_entry directly when we implement sliding window mmap logic, so I'm doing it earlier to help break down the change set. This may cause a slight performance decrease for delta base resolution as well as for pack-check.c's verify_packfile(), as the pack use counter will be incremented and decremented for every object that is unpacked. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-27UTF-8: introduce i18n.logoutputencoding.Libravatar Junio C Hamano1-2/+2
It is plausible for somebody to want to view the commit log in a different encoding from i18n.commitencoding -- the project's policy may be UTF-8 and the user may be using a commit message hook to run iconv to conform to that policy (and either not have i18n.commitencoding to default to UTF-8 or have it explicitly set to UTF-8). Even then, Latin-1 may be more convenient for the usual pager and the terminal the user uses. The new variable i18n.logoutputencoding is used in preference to i18n.commitencoding to decide what encoding to recode the log output in when git-log and friends formats the commit log message. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-19Use preprocessor constants for environment variable names.Libravatar Junio C Hamano1-0/+4
We broke the discipline Linus set up to allow compiler help us avoid typos in environment names in the early days of git over time. This defines a handful preprocessor constants for environment variable names used in relatively core parts of the system. I've left out variable names specific to subsystems such as HTTP and SSL as I do not think they are big problems. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-17Merge branch 'js/branch-config'Libravatar Junio C Hamano1-0/+1
* js/branch-config: git-branch: rename config vars branch.<branch>.*, too add a function to rename sections in the config
2006-12-17Default GIT_COMMITTER_NAME to login name in recieve-pack.Libravatar Shawn O. Pearce1-0/+1
If GIT_COMMITTER_NAME is not available in receive-pack but reflogs are enabled we would normally die out with an error message asking the user to correct their environment settings. Now that reflogs are enabled by default in (what we guessed to be) non-bare Git repositories this may cause problems for some users who don't have their full name in the gecos field and who don't have access to the remote system to correct the problem. So rather than die()'ing out in receive-pack when we try to log a ref change and have no committer name we default to the username, as obtained from the host's password database. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-16add a function to rename sections in the configLibravatar Johannes Schindelin1-0/+1
Given a config like this: # A config [very.interesting.section] not The command $ git repo-config --rename-section very.interesting.section bla.1 will lead to this config: # A config [bla "1"] not Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-15Enable reflogs by default in any repository with a working directory.Libravatar Shawn O. Pearce1-0/+1
New and experienced Git users alike are finding out too late that they forgot to enable reflogs in the current repository, and cannot use the information stored within it to recover from an incorrectly entered command such as `git reset --hard HEAD^^^` when they really meant HEAD^^ (aka HEAD~2). So enable reflogs by default in all future versions of Git, unless the user specifically disables it with: [core] logAllRefUpdates = false in their .git/config or ~/.gitconfig. We only enable reflogs in repositories that have a working directory associated with them, as shared/bare repositories do not have an easy means to prune away old log entries, or may fail logging entirely if the user's gecos information is not valid during a push. This heuristic was suggested on the mailing list by Junio. Documentation was also updated to indicate the new default behavior. We probably should start to teach usuing the reflog to recover from mistakes in some of the tutorial material, as new users are likely to make a few along the way and will feel better knowing they can recover from them quickly and easily, without fsck-objects' lost+found features. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-03improve fetch-pack's handling of kept packsLibravatar Nicolas Pitre1-4/+0
Since functions in fetch-clone.c were only used from fetch-pack.c, its content has been merged with fetch-pack.c. This allows for better coupling of features with much simpler implementations. One new thing is that the (abscence of) --thin also enforce it on index-pack now, such that index-pack will abort if a thin pack was _not_ asked for. The -k or --keep, when provided twice, now causes the fetched pack to be left as a kept pack just like receive-pack currently does. Eventually this will be used to close a race against concurrent repacking. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-03Teach receive-pack how to keep pack files based on object count.Libravatar Shawn Pearce1-0/+1
Since keeping a pushed pack or exploding it into loose objects should be a local repository decision this teaches receive-pack to decide if it should call unpack-objects or index-pack --stdin --fix-thin based on the setting of receive.unpackLimit and the number of objects contained in the received pack. If the number of objects (hdr_entries) in the received pack is below the value of receive.unpackLimit (which is 5000 by default) then we unpack-objects as we have in the past. If the hdr_entries >= receive.unpackLimit then we call index-pack and ask it to include our pid and hostname in the .keep file to make it easier to identify why a given pack has been kept in the repository. Currently this leaves every received pack as a kept pack. We really don't want that as received packs will tend to be small. Instead we want to delete the .keep file automatically after all refs have been updated. That is being left as room for future improvement. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-01Merge branch 'lj/refs'Libravatar Junio C Hamano1-3/+4
* lj/refs: (63 commits) Fix show-ref usagestring t3200: git-branch testsuite update sha1_name.c: avoid compilation warnings. Make git-branch a builtin ref-log: fix D/F conflict coming from deleted refs. git-revert with conflicts to behave as git-merge with conflicts core.logallrefupdates thinko-fix git-pack-refs --all core.logallrefupdates create new log file only for branch heads. Remove bashism from t3210-pack-refs.sh ref-log: allow ref@{count} syntax. pack-refs: call fflush before fsync. pack-refs: use lockfile as everybody else does. git-fetch: do not look into $GIT_DIR/refs to see if a tag exists. lock_ref_sha1_basic does not remove empty directories on BSD Do not create tag leading directories since git update-ref does it. Check that a tag exists using show-ref instead of looking for the ref file. Use git-update-ref to delete a tag instead of rm()ing the ref file. Fix refs.c;:repack_without_ref() clean-up path Clean up "git-branch.sh" and add remove recursive dir test cases. ...
2006-10-30Move deny_non_fast_forwards handling completely into receive-pack.Libravatar Shawn Pearce1-1/+0
The 'receive.denynonfastforwards' option has nothing to do with the repository format version. Since receive-pack already uses git_config to initialize itself before executing any updates we can use the normal configuration strategy and isolate the receive specific variables away from the core variables. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-22Merge branch 'np/pack'Libravatar Junio C Hamano1-2/+3
* np/pack: add the capability for index-pack to read from a stream index-pack: compare only the first 20-bytes of the key. git-repack: repo.usedeltabaseoffset pack-objects: document --delta-base-offset option allow delta data reuse even if base object is a preferred base zap a debug remnant let the GIT native protocol use offsets to delta base when possible make pack data reuse compatible with both delta types make git-pack-objects able to create deltas with offset to base teach git-index-pack about deltas with offset to base teach git-unpack-objects about deltas with offset to base introduce delta objects with offset to base
2006-10-14Make write_sha1_file_prepare() staticLibravatar Rene Scharfe1-6/+0
There are no callers of write_sha1_file_prepare() left outside of sha1_file.c, so make it static. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-14Add hash_sha1_file()Libravatar Rene Scharfe1-0/+1
Most callers of write_sha1_file_prepare() are only interested in the resulting hash but don't care about the returned file name or the header. This patch adds a simple wrapper named hash_sha1_file() which does just that, and converts potential callers. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-27Merge branch 'master' into lj/refsLibravatar Junio C Hamano1-3/+10
* master: (72 commits) runstatus: do not recurse into subdirectories if not needed grep: fix --fixed-strings combined with expression. grep: free expressions and patterns when done. Corrected copy-and-paste thinko in ignore executable bit test case. An illustration of rev-list --parents --pretty=raw Allow git-checkout when on a non-existant branch. gitweb: Decode long title for link tooltips git-svn: Fix fetch --no-ignore-externals with GIT_SVN_NO_LIB=1 Ignore executable bit when adding files if filemode=0. Remove empty ref directories that prevent creating a ref. Use const for interpolate arguments git-archive: update documentation Deprecate merge-recursive.py gitweb: fix over-eager application of esc_html(). Allow '(no author)' in git-svn's authors file. Allow 'svn fetch' on '(no date)' revisions in Subversion. git-repack: allow git-repack to run in subdirectory Remove upload-tar and make git-tar-tree a thin wrapper to git-archive git-tar-tree: Move code for git-archive --format=tar to archive-tar.c git-tar-tree: Remove duplicate git_config() call ...
2006-09-27update-ref: -d flag and ref creation safety.Libravatar Junio C Hamano1-0/+1
This adds -d flag to update-ref to allow safe deletion of ref. Before deleting it, the command checks if the given <oldvalue> still matches the value the caller thought the ref contained. Similarly, it also accepts 0{40} or an empty string as <oldvalue> to allow safe creation of a new ref. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-27introduce delta objects with offset to baseLibravatar Nicolas Pitre1-2/+3
This adds a new object, namely OBJ_OFS_DELTA, renames OBJ_DELTA to OBJ_REF_DELTA to better make the distinction between those two delta objects, and adds support for the handling of those new delta objects in sha1_file.c only. The OBJ_OFS_DELTA contains a relative offset from the delta object's position in a pack instead of the 20-byte SHA1 reference to identify the base object. Since the base is likely to be not so far away, the relative offset is more likely to have a smaller encoding on average than an absolute offset. And for those delta objects the base must always be stored first because there is no way to know the distance of later objects when streaming a pack. Hence this relative offset is always meant to be negative. The offset encoding is slightly denser than the one used for object size -- credits to <linux@horizon.com> (whoever this is) for bringing it to my attention. This allows for pack size reduction between 3.2% (Linux-2.6) to over 5% (linux-historic). Runtime pack access should be faster too since delta replay does skip a search in the pack index for each delta in a chain. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-23many cleanups to sha1_file.cLibravatar Nicolas Pitre1-3/+3
Those cleanups are mainly to set the table for the support of deltas with base objects referenced by offsets instead of sha1. This means that many pack lookup functions are converted to take a pack/offset tuple instead of a sha1. This eliminates many struct pack_entry usages since this structure carried redundent information in many cases, and it increased stack footprint needlessly for a couple recursively called functions that used to declare a local copy of it for every recursion loop. In the process, packed_object_info_detail() has been reorganized as well so to look much saner and more amenable to deltas with offset support. Finally the appropriate adjustments have been made to functions that depend on the above changes. But there is no functionality changes yet simply some code refactoring at this point. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-20Tell between packed, unpacked and symbolic refs.Libravatar Junio C Hamano1-1/+1
This adds a "int *flag" parameter to resolve_ref() and makes for_each_ref() family to call callback function with an extra "int flag" parameter. They are used to give two bits of information (REF_ISSYMREF and REF_ISPACKED) about the ref. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-20add receive.denyNonFastforwards config variableLibravatar Johannes Schindelin1-0/+1
If receive.denyNonFastforwards is set to true, git-receive-pack will deny non fast-forwards, i.e. forced updates. Most notably, a push to a repository which has that flag set will fail. As a first user, 'git-init-db --shared' sets this flag, since in a shared setup, you are most unlikely to want forced pushes to succeed. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-20Make hexval() available to others.Libravatar Junio C Hamano1-0/+6
builtin-mailinfo.c has its own hexval implementaiton but it can share the table-lookup one recently implemented in sha1_file.c Signed-off-by: Junio C Hamano <junkio@cox.net>