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2013-06-24Merge branch 'rs/unpack-trees-tree-walk-conflict-field'Libravatar Junio C Hamano1-15/+3
Code clean-up. * rs/unpack-trees-tree-walk-conflict-field: unpack-trees: don't shift conflicts left and right
2013-06-17unpack-trees: don't shift conflicts left and rightLibravatar René Scharfe1-15/+3
If o->merge is set, the struct traverse_info member conflicts is shifted left in unpack_callback, then passed through traverse_trees_recursive to unpack_nondirectories, where it is shifted right before use. Stop the shifting and just pass the conflict bit mask as is. Rename the member to df_conflicts to prove that it isn't used anywhere else. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02unpack-trees: free cache_entry array members for mergesLibravatar René Scharfe1-3/+10
The merge functions duplicate entries as needed and they don't free them. Release them in unpack_nondirectories, the same function where they were allocated, after we're done. As suggested by Felipe, use the same loop style (zero-based for loop) for freeing as for allocating. Improved-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02diff-lib, read-tree, unpack-trees: mark cache_entry array paramters constLibravatar René Scharfe1-8/+13
Change the type merge_fn_t to accept the array of cache_entry pointers as const pointers to const pointers. This documents the fact that the merge functions don't modify the cache_entry contents or replace any of the pointers in the array. Only a single cast is necessary in unpack_nondirectories because adding two const modifiers at once is not allowed in C. The cast is safe in that it doesn't mask any modfication; call_unpack_fn only needs the array for reading. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02diff-lib, read-tree, unpack-trees: mark cache_entry pointers constLibravatar René Scharfe1-41/+50
Add const to struct cache_entry pointers throughout the tree which are only used for reading. This allows callers to pass in const pointers. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02unpack-trees: create working copy of merge entry in merged_entryLibravatar René Scharfe1-5/+12
Duplicate the merge entry right away and work with that instead of modifying the entry we got and duplicating it only at the end of the function. Then mark that pointer const to document that we don't modify the referenced cache_entry. This change is safe because all existing merge functions call merged_entry just before returning (or not at all), i.e. they don't care about changes to the referenced cache_entry after the call. unpack_nondirectories and unpack_index_entry, which call the merge functions through call_unpack_fn, aren't interested in such changes neither. The change complicates merged_entry a bit because we have to free the copy if we error out, but allows callers to pass a const pointer. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02unpack-trees: factor out dup_entryLibravatar René Scharfe1-3/+9
While we're add it, mark the struct cache_entry pointer of add_entry const because we only read from it and this allows callers to pass in const pointers. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-04-15dir.c: replace is_path_excluded with now equivalent is_excluded APILibravatar Karsten Blees1-9/+1
Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-23Merge branch 'as/check-ignore'Libravatar Junio C Hamano1-1/+1
Add a new command "git check-ignore" for debugging .gitignore files. The variable names may want to get cleaned up but that can be done in-tree. * as/check-ignore: clean.c, ls-files.c: respect encapsulation of exclude_list_groups t0008: avoid brace expansion add git-check-ignore sub-command setup.c: document get_pathspec() add.c: extract new die_if_path_beyond_symlink() for reuse add.c: extract check_path_for_gitlink() from treat_gitlinks() for reuse pathspec.c: rename newly public functions for clarity add.c: move pathspec matchers into new pathspec.c for reuse add.c: remove unused argument from validate_pathspec() dir.c: improve docs for match_pathspec() and match_pathspec_depth() dir.c: provide clear_directory() for reclaiming dir_struct memory dir.c: keep track of where patterns came from dir.c: use a single struct exclude_list per source of excludes Conflicts: builtin/ls-files.c dir.c
2013-01-10Merge branch 'as/dir-c-cleanup'Libravatar Junio C Hamano1-5/+7
Refactor and generally clean up the directory traversal API implementation. * as/dir-c-cleanup: dir.c: rename free_excludes() to clear_exclude_list() dir.c: refactor is_path_excluded() dir.c: refactor is_excluded() dir.c: refactor is_excluded_from_list() dir.c: rename excluded() to is_excluded() dir.c: rename excluded_from_list() to is_excluded_from_list() dir.c: rename path_excluded() to is_path_excluded() dir.c: rename cryptic 'which' variable to more consistent name Improve documentation and comments regarding directory traversal API api-directory-listing.txt: update to match code
2013-01-06dir.c: use a single struct exclude_list per source of excludesLibravatar Adam Spiers1-1/+1
Previously each exclude_list could potentially contain patterns from multiple sources. For example dir->exclude_list[EXC_FILE] would typically contain patterns from .git/info/exclude and core.excludesfile, and dir->exclude_list[EXC_DIRS] could contain patterns from multiple per-directory .gitignore files during directory traversal (i.e. when dir->exclude_stack was more than one item deep). We split these composite exclude_lists up into three groups of exclude_lists (EXC_CMDL / EXC_DIRS / EXC_FILE as before), so that each exclude_list now contains patterns from a single source. This will allow us to cleanly track the origin of each pattern simply by adding a src field to struct exclude_list, rather than to struct exclude, which would make memory management of the source string tricky in the EXC_DIRS case where its contents are dynamically generated. Similarly, by moving the filebuf member from struct exclude_stack to struct exclude_list, it allows us to track and subsequently free memory buffers allocated during the parsing of all exclude files, rather than only tracking buffers allocated for files in the EXC_DIRS group. Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-28dir.c: rename free_excludes() to clear_exclude_list()Libravatar Adam Spiers1-1/+1
It is clearer to use a 'clear_' prefix for functions which empty and deallocate the contents of a data structure without freeing the structure itself, and a 'free_' prefix for functions which also free the structure itself. http://article.gmane.org/gmane.comp.version-control.git/206128 Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-28dir.c: rename excluded_from_list() to is_excluded_from_list()Libravatar Adam Spiers1-3/+5
Continue adopting clearer names for exclude functions. This 'is_*' naming pattern for functions returning booleans was discussed here: http://thread.gmane.org/gmane.comp.version-control.git/204661/focus=204924 Also adjust their callers as necessary. Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-28dir.c: rename path_excluded() to is_path_excluded()Libravatar Adam Spiers1-1/+1
Start adopting clearer names for exclude functions. This 'is_*' naming pattern for functions returning booleans was agreed here: http://thread.gmane.org/gmane.comp.version-control.git/204661/focus=204924 Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20oneway_merge(): only lstat() when told to update worktreeLibravatar Martin von Zweigbergk1-1/+1
Although the subject line of 613f027 (read-tree -u one-way merge fix to check out locally modified paths., 2006-05-15) mentions "read-tree -u", it did not seem to check whether -u was in effect. Not checking whether -u is in effect makes e.g. "read-tree --reset" lstat() the worktree, even though the worktree stat should not matter for that operation. This speeds up e.g. "git reset" a little on the linux-2.6 repo (best of five, warm cache): Before After real 0m0.288s 0m0.233s user 0m0.190s 0m0.150s sys 0m0.090s 0m0.080s Signed-off-by: Martin von Zweigbergk <martinvonz@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-07-23Merge branch 'tg/ce-namelen-field'Libravatar Junio C Hamano1-1/+2
Split lower bits of ce_flags field and creates a new ce_namelen field in the in-core index structure. * tg/ce-namelen-field: Strip namelen out of ce_flags into a ce_namelen field
2012-07-11Merge branch 'jc/ls-files-i-dir' into maintLibravatar Junio C Hamano1-1/+10
"git ls-files --exclude=t -i" did not consider anything under t/ as excluded, as it did not pay attention to exclusion of leading paths while walking the index. Other two users of excluded() are also updated. * jc/ls-files-i-dir: dir.c: make excluded() file scope static unpack-trees.c: use path_excluded() in check_ok_to_remove() builtin/add.c: use path_excluded() path_excluded(): update API to less cache-entry centric ls-files -i: micro-optimize path_excluded() ls-files -i: pay attention to exclusion of leading paths
2012-07-11Strip namelen out of ce_flags into a ce_namelen fieldLibravatar Thomas Gummerer1-1/+2
Strip the name length from the ce_flags field and move it into its own ce_namelen field in struct cache_entry. This will both give us a tiny bit of a performance enhancement when working with long pathnames and is a refactoring for more readability of the code. It enhances readability, by making it more clear what is a flag, and where the length is stored and make it clear which functions use stages in comparisions and which only use the length. It also makes CE_NAMEMASK private, so that users don't mistakenly write the name length in the flags. Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-07-08Replace strlen() with ce_namelen()Libravatar Thomas Gummerer1-1/+1
Replace strlen(ce->name) with ce_namelen() in a couple of places which gives us some additional bits of performance. Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-06-21Merge branch 'jc/ls-files-i-dir'Libravatar Junio C Hamano1-1/+10
"git ls-files --exclude=t -i" did not consider anything under t/ as excluded, as it did not pay attention to exclusion of leading paths while walking the index. Other two users of excluded() are also updated. * jc/ls-files-i-dir: dir.c: make excluded() file scope static unpack-trees.c: use path_excluded() in check_ok_to_remove() builtin/add.c: use path_excluded() path_excluded(): update API to less cache-entry centric ls-files -i: micro-optimize path_excluded() ls-files -i: pay attention to exclusion of leading paths
2012-06-05unpack-trees.c: use path_excluded() in check_ok_to_remove()Libravatar Junio C Hamano1-1/+10
This function is responsible for determining if a path that is not tracked is ignored and allow "checkout" to overwrite it as needed. It used excluded() without checking if higher level directory in the path is ignored; correct it to use path_excluded() for this check. Signed-off-by: Junio C Hamano <gitster@pobox.com> --- * There are uses of lower-level interface excluded_from_list() in the codepath for narrow-checkout hack; they are supposed to be already checking each level as they descend, and are not touched with this patch.
2012-05-20Merge branch 'maint'Libravatar Junio C Hamano1-1/+1
By Jens Lehmann (1) and Johannes Sixt (1) * maint: Consistently use "superproject" instead of "supermodule" t3404: begin "exchange commits with -p" test with correct preconditions
2012-05-20Consistently use "superproject" instead of "supermodule"Libravatar Jens Lehmann1-1/+1
We fairly consistently say "superproject" and never "supermodule" these days. But there are seven occurrences of "supermodule" left in the current work tree. Three appear in Release Notes for 1.5.3 and 1.7.7, three in test names and one in a C-code comment. Replace all occurrences of "supermodule" outside of the Release Notes (which shouldn't be changed after the fact) with "superproject" for consistency. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-02Merge branch 'pw/message-cleanup'Libravatar Junio C Hamano1-1/+1
Many error/warning messages had extra trailing newlines that are unnecessary. By Pete Wyckoff * pw/message-cleanup: remove blank filename in error message remove superfluous newlines in error messages
2012-05-02Merge branch 'jc/index-v4'Libravatar Junio C Hamano1-0/+1
Trivially shrinks the on-disk size of the index file to save both I/O and checksum overhead. The topic should give a solid base to build on further updates, with the code refactoring in its earlier parts, and the backward compatibility mechanism in its later parts. * jc/index-v4: index-v4: document the entry format unpack-trees: preserve the index file version of original update-index: upgrade/downgrade on-disk index version read-cache.c: write prefix-compressed names in the index read-cache.c: read prefix-compressed names in index on-disk version v4 read-cache.c: move code to copy incore to ondisk cache to a helper function read-cache.c: move code to copy ondisk to incore cache to a helper function read-cache.c: report the header version we do not understand read-cache.c: make create_from_disk() report number of bytes it consumed read-cache.c: allow unaligned mapping of the index file cache.h: hide on-disk index details varint: make it available outside the context of pack
2012-04-30remove superfluous newlines in error messagesLibravatar Pete Wyckoff1-1/+1
The error handling routines add a newline. Remove the duplicate ones in error messages. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-04-27unpack-trees: preserve the index file version of originalLibravatar Junio C Hamano1-0/+1
Otherwise "git checkout $other_branch" (or even "git checkout HEAD") would end up writing the index out in the default format. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-04-10unpack-trees: plug minor memory leakLibravatar René Scharfe1-9/+16
The allocations made by unpack_nondirectories() using create_ce_entry() are never freed. In the non-merge case, we duplicate them using add_entry() and later only look at the first allocated element (src[0]), perhaps even only by mistake. Split out the actual addition from add_entry() into the new helper do_add_entry() and call this non-duplicating function instead of add_entry() to avoid the leak. Valgrind reports this for the command "git archive v1.7.9" without the patch: ==13372== LEAK SUMMARY: ==13372== definitely lost: 230,986 bytes in 2,325 blocks ==13372== indirectly lost: 0 bytes in 0 blocks ==13372== possibly lost: 98 bytes in 1 blocks ==13372== still reachable: 2,259,198 bytes in 3,243 blocks ==13372== suppressed: 0 bytes in 0 blocks And with the patch applied: ==13375== LEAK SUMMARY: ==13375== definitely lost: 65 bytes in 1 blocks ==13375== indirectly lost: 0 bytes in 0 blocks ==13375== possibly lost: 0 bytes in 0 blocks ==13375== still reachable: 2,364,417 bytes in 3,245 blocks ==13375== suppressed: 0 bytes in 0 blocks Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-04-10unpack-trees: don't perform any index operation if we're not mergingLibravatar René Scharfe1-1/+1
src[0] points to the index entry in the merge case and to the first tree to unpack in the non-merge case. We only want to mark the index entry, so check first if we're merging. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-27tree-walk.c: do not leak internal structure in tree_entry_len()Libravatar Nguyễn Thái Ngọc Duy1-3/+3
tree_entry_len() does not simply take two random arguments and return a tree length. The two pointers must point to a tree item structure, or struct name_entry. Passing random pointers will return incorrect value. Force callers to pass struct name_entry instead of two pointers (with hope that they don't manually construct struct name_entry themselves) Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-13Merge branch 'nd/maint-sparse-errors'Libravatar Junio C Hamano1-4/+16
* nd/maint-sparse-errors: Add explanation why we do not allow to sparse checkout to empty working tree sparse checkout: show error messages when worktree shaping fails
2011-10-05Merge branch 'mg/maint-doc-sparse-checkout'Libravatar Junio C Hamano1-1/+1
* mg/maint-doc-sparse-checkout: git-read-tree.txt: correct sparse-checkout and skip-worktree description git-read-tree.txt: language and typography fixes unpack-trees: print "Aborting" to stderr
2011-10-05Merge branch 'jc/diff-index-unpack'Libravatar Junio C Hamano1-0/+2
* jc/diff-index-unpack: diff-index: pass pathspec down to unpack-trees machinery unpack-trees: allow pruning with pathspec traverse_trees(): allow pruning with pathspec
2011-09-22Add explanation why we do not allow to sparse checkout to empty working treeLibravatar Nguyễn Thái Ngọc Duy1-1/+6
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-22sparse checkout: show error messages when worktree shaping failsLibravatar Nguyễn Thái Ngọc Duy1-3/+10
verify_* functions can queue errors up and to be printed later at label return_failed. In case of errors, do not go to label "done" directly because all queued messages would be dropped on the floor. Found-by: Joshua Jensen <jjensen@workspacewhiz.com> Tracked-down-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-21unpack-trees: print "Aborting" to stderrLibravatar Michael J Gruber1-1/+1
display_error_msgs() prints all the errors to stderr already (if any), followed by "Aborting" (if any) to stdout. Make the latter go to stderr instead. Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-29unpack-trees: allow pruning with pathspecLibravatar Junio C Hamano1-0/+2
Use the pathspec pruning of traverse_trees() from unpack_trees(). Again, the unpack_trees() machinery is primarily meant for merging two (or more) trees, and because a merge is a full tree operation, it didn't support any pruning with pathspec, and this codepath probably should not be enabled while running a merge, but the caller in diff-lib.c::diff_cache() should be able to take advantage of it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-07-31Merge branch 'maint'Libravatar Junio C Hamano1-2/+13
* maint: Break down no-lstat() condition checks in verify_uptodate() t7400: fix bogus test failure with symlinked trash Documentation: clarify the invalidated tree entry format
2011-07-31Break down no-lstat() condition checks in verify_uptodate()Libravatar Nguyễn Thái Ngọc Duy1-2/+13
Make it easier to grok under what conditions we can skip lstat(). While at there, shorten ie_match_stat() line for the sake of my eyes. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-29Merge branch 'jc/diff-index-quick-exit-early'Libravatar Junio C Hamano1-1/+3
* jc/diff-index-quick-exit-early: diff-index --quiet: learn the "stop feeding the backend early" logic Conflicts: unpack-trees.h
2011-05-31diff-index --quiet: learn the "stop feeding the backend early" logicLibravatar Junio C Hamano1-1/+3
A negative return from the unpack callback function usually means unpack failed for the entry and signals the unpack_trees() machinery to fail the entire merge operation, immediately and there is no other way for the callback to tell the machinery to exit early without reporting an error. This is what we usually want to make a merge all-or-nothing operation, but the machinery is also used for diff-index codepath by using a custom unpack callback function. And we do sometimes want to exit early without failing, namely when we are under --quiet and can short-cut the diff upon finding the first difference. Add "exiting_early" field to unpack_trees_options structure, to signal the unpack_trees() machinery that the negative return value is not signaling an error but an early return from the unpack_trees() machinery. As this by definition hasn't unpacked everything, discard the resulting index just like the failure codepath. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-25unpack-trees: add the dry_run flag to unpack_trees_optionsLibravatar Jens Lehmann1-2/+2
Until now there was no way to test if unpack_trees() with update=1 would succeed without really updating the work tree. The reason for that is that setting update to 0 does skip the tests for new files and deactivates the sparse handling, thereby making that unsuitable as a dry run. Add the new dry_run flag to struct unpack_trees_options unpack_trees(). Setting that together with the update flag will check if the work tree update would be successful without doing it for real. The only class of problems that is not detected at the moment are file system conditions like ENOSPC or missing permissions. Also the index entries of updated files are not as they would be after a real checkout because lstat() isn't run as the files aren't updated for real. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-10sparse checkout: do not eagerly decide the fate for whole directoryLibravatar Nguyễn Thái Ngọc Duy1-29/+34
Sparse-setting code follows closely how files are excluded in read_directory(), every entry (including directories) are fed to excluded_from_list() to decide if the entry is suitable. Directories are treated no different than files. If a directory is matched (or not), the whole directory is considered matched (or not) and the process moves on. This generally works as long as there are no patterns to exclude parts of the directory. In case of sparse checkout code, the following patterns t !t/t0000-basic.sh will produce a worktree with full directory "t" even if t0000-basic.sh is requested to stay out. By the same reasoning, if a directory is to be excluded, any rules to re-include certain files within that directory will be ignored. Fix it by always checking files against patterns. If no pattern can be used to decide whether an entry is in our out (ie. excluded_from_list() returns -1), the entry will be included/excluded the same as their parent directory. Noticed-by: <skillzero@gmail.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-22Fix sparse warningsLibravatar Stephen Boyd1-1/+1
Fix warnings from 'make check'. - These files don't include 'builtin.h' causing sparse to complain that cmd_* isn't declared: builtin/clone.c:364, builtin/fetch-pack.c:797, builtin/fmt-merge-msg.c:34, builtin/hash-object.c:78, builtin/merge-index.c:69, builtin/merge-recursive.c:22 builtin/merge-tree.c:341, builtin/mktag.c:156, builtin/notes.c:426 builtin/notes.c:822, builtin/pack-redundant.c:596, builtin/pack-refs.c:10, builtin/patch-id.c:60, builtin/patch-id.c:149, builtin/remote.c:1512, builtin/remote-ext.c:240, builtin/remote-fd.c:53, builtin/reset.c:236, builtin/send-pack.c:384, builtin/unpack-file.c:25, builtin/var.c:75 - These files have symbols which should be marked static since they're only file scope: submodule.c:12, diff.c:631, replace_object.c:92, submodule.c:13, submodule.c:14, trace.c:78, transport.c:195, transport-helper.c:79, unpack-trees.c:19, url.c:3, url.c:18, url.c:104, url.c:117, url.c:123, url.c:129, url.c:136, thread-utils.c:21, thread-utils.c:48 - These files redeclare symbols to be different types: builtin/index-pack.c:210, parse-options.c:564, parse-options.c:571, usage.c:49, usage.c:58, usage.c:63, usage.c:72 - These files use a literal integer 0 when they really should use a NULL pointer: daemon.c:663, fast-import.c:2942, imap-send.c:1072, notes-merge.c:362 While we're in the area, clean up some unused #includes in builtin files (mostly exec_cmd.h). Signed-off-by: Stephen Boyd <bebarino@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-15Revert "unpack_trees(): skip trees that are the same in all input"Libravatar Junio C Hamano1-56/+0
This reverts commit 83c90314aa27ae3768c04375d02e4f3fb12b726d, which seems to have broken merge to report conflicts when there should be none.
2011-02-09Merge branch 'jc/unpack-trees'Libravatar Junio C Hamano1-2/+62
* jc/unpack-trees: unpack_trees(): skip trees that are the same in all input unpack-trees.c: cosmetic fix Conflicts: unpack-trees.c
2011-02-09Merge branch 'jn/unpack-lstat-failure-report'Libravatar Junio C Hamano1-6/+12
* jn/unpack-lstat-failure-report: unpack-trees: handle lstat failure for existing file unpack-trees: handle lstat failure for existing directory
2011-01-13unpack-trees: handle lstat failure for existing fileLibravatar Jonathan Nieder1-1/+3
When check_leading_path notices a file in the way of a new entry to be checked out, verify_absent uses (1) the mode to determine whether it is a directory (2) the rest of the stat information to check if this is actually an old entry, disguised by a change in filename (e.g., README -> Readme) that is significant to git but insignificant to the underlying filesystem. If lstat fails, these checks are performed with an uninitialied stat structure, producing essentially random results. Better to just error out when lstat fails. The easiest way to reproduce this is to remove a file after the check_leading_path call and before the lstat in verify_absent. An lstat failure other than ENOENT in check_leading_path would also trigger the same code path. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-13unpack-trees: handle lstat failure for existing directoryLibravatar Jonathan Nieder1-5/+9
When check_leading_path notices no file in the way of the new entry to be checked out, verify_absent checks whether there is a directory there or nothing at all. If that lstat call fails (for example due to ENOMEM), it assumes ENOENT, meaning a directory with untracked files would be clobbered in that case. Check errno after calling lstat, and for conditions other than ENOENT, just error out. This is a theoretical race condition. lstat has to succeed moments before it fails for there to be trouble. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-04unpack_trees(): skip trees that are the same in all inputLibravatar Junio C Hamano1-0/+56
unpack_trees() merges two trees (the current HEAD and the destination commit) when switching to another branch, checking and updating the index entry where the destination differs from the current HEAD. It merges three trees (the common ancestor, the current HEAD and the other commit) when performing a three-way merge, checking and updating the index entry when the merge result differs from the current HEAD. It does so by walking the input trees in parallel all the way down to the leaves. One common special case is a directory is identical across the trees involved in the merge. In such a case, we do not have to descend into the directory at all---we know that the end result is to keep the entries in the current index. This optimization cannot be applied in a few special cases in unpack_trees(), though. We need to descend into the directory and update the index entries from the target tree in the following cases: - When resetting (e.g. "git reset --hard"); and - When checking out a tree for the first time into an empty working tree (e.g. "git read-tree -m -u HEAD HEAD" with missing .git/index). Signed-off-by: Junio C Hamano <gitster@pobox.com>