user/sven/git.git/environment.c, branch v1.8.0.2

git on Mac OS and precomposed unicode

2012-07-09T05:03:46Z

Mac OS X mangles file names containing unicode on file systems HFS+, VFAT or SAMBA. When a file using unicode code points outside ASCII is created on a HFS+ drive, the file name is converted into decomposed unicode and written to disk. No conversion is done if the file name is already decomposed unicode. Calling open("\xc3\x84", ...) with a precomposed "Ä" yields the same result as open("\x41\xcc\x88",...) with a decomposed "Ä". As a consequence, readdir() returns the file names in decomposed unicode, even if the user expects precomposed unicode. Unlike on HFS+, Mac OS X stores files on a VFAT drive (e.g. an USB drive) in precomposed unicode, but readdir() still returns file names in decomposed unicode. When a git repository is stored on a network share using SAMBA, file names are send over the wire and written to disk on the remote system in precomposed unicode, but Mac OS X readdir() returns decomposed unicode to be compatible with its behaviour on HFS+ and VFAT. The unicode decomposition causes many problems: - The names "git add" and other commands get from the end user may often be precomposed form (the decomposed form is not easily input from the keyboard), but when the commands read from the filesystem to see what it is going to update the index with already is on the filesystem, readdir() will give decomposed form, which is different. - Similarly "git log", "git mv" and all other commands that need to compare pathnames found on the command line (often but not always precomposed form; a command line input resulting from globbing may be in decomposed) with pathnames found in the tree objects (should be precomposed form to be compatible with other systems and for consistency in general). - The same for names stored in the index, which should be precomposed, that may need to be compared with the names read from readdir(). NFS mounted from Linux is fully transparent and does not suffer from the above. As Mac OS X treats precomposed and decomposed file names as equal, we can - wrap readdir() on Mac OS X to return the precomposed form, and - normalize decomposed form given from the command line also to the precomposed form, to ensure that all pathnames used in Git are always in the precomposed form. This behaviour can be requested by setting "core.precomposedunicode" configuration variable to true. The code in compat/precomposed_utf8.c implements basically 4 new functions: precomposed_utf8_opendir(), precomposed_utf8_readdir(), precomposed_utf8_closedir() and precompose_argv(). The first three are to wrap opendir(3), readdir(3), and closedir(3) functions. The argv[] conversion allows to use the TAB filename completion done by the shell on command line. It tolerates other tools which use readdir() to feed decomposed file names into git. When creating a new git repository with "git init" or "git clone", "core.precomposedunicode" will be set "false". The user needs to activate this feature manually. She typically sets core.precomposedunicode to "true" on HFS and VFAT, or file systems mounted via SAMBA. Helped-by: Junio C Hamano Signed-off-by: Torsten Bögershausen Signed-off-by: Junio C Hamano

move git_default_* variables to ident.c

2012-05-22T16:07:53Z

There's no reason anybody outside of ident.c should access these directly (they should use the new accessors which make sure the variables are initialized), so we can make them file-scope statics. While we're at it, move user_ident_explicitly_given into ident.c; while still globally visible, it makes more sense to reside with the ident code. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

push: Provide situational hints for non-fast-forward errors

2012-03-20T04:42:06Z

Pushing a non-fast-forward update to a remote repository will result in an error, but the hint text doesn't provide the correct resolution in every case. Give better resolution advice in three push scenarios: 1) If you push your current branch and it triggers a non-fast-forward error, you should merge remote changes with 'git pull' before pushing again. 2) If you push to a shared repository others push to, and your local tracking branches are not kept up to date, the 'matching refs' default will generate non-fast-forward errors on outdated branches. If this is your workflow, the 'matching refs' default is not for you. Consider setting the 'push.default' configuration variable to 'current' or 'upstream' to ensure only your current branch is pushed. 3) If you explicitly specify a ref that is not your current branch or push matching branches with ':', you will generate a non-fast-forward error if any pushed branch tip is out of date. You should checkout the offending branch and merge remote changes before pushing again. Teach transport.c to recognize these scenarios and configure push.c to hint for them. If 'git push's default behavior changes or we discover more scenarios, extension is easy. Standardize on the advice API and add three new advice variables, 'pushNonFFCurrent', 'pushNonFFDefault', and 'pushNonFFMatching'. Setting any of these to 'false' will disable their affiliated advice. Setting 'pushNonFastForward' to false will disable all three, thus preserving the config option for users who already set it, but guaranteeing new users won't disable push advice accidentally. Based-on-patch-by: Junio C Hamano Signed-off-by: Christopher Tiwald Signed-off-by: Junio C Hamano

Merge branch 'jc/stream-to-pack'

2011-12-17T06:33:40Z

* jc/stream-to-pack: bulk-checkin: replace fast-import based implementation csum-file: introduce sha1file_checkpoint finish_tmp_packfile(): a helper function create_tmp_packfile(): a helper function write_pack_header(): a helper function Conflicts: pack.h

Merge branch 'jc/request-pull-show-head-4'

2011-12-09T21:37:05Z

* jc/request-pull-show-head-4: request-pull: use the annotated tag contents fmt-merge-msg.c: Fix an "dubious one-bit signed bitfield" sparse error environment.c: Fix an sparse "symbol not declared" warning builtin/log.c: Fix an "Using plain integer as NULL pointer" warning fmt-merge-msg: use branch.$name.description request-pull: use the branch description request-pull: state what commit to expect request-pull: modernize style branch: teach --edit-description option format-patch: use branch description in cover letter branch: add read_branch_desc() helper function Conflicts: builtin/branch.c

bulk-checkin: replace fast-import based implementation

2011-12-01T19:46:09Z

This extends the earlier approach to stream a large file directly from the filesystem to its own packfile, and allows "git add" to send large files directly into a single pack. Older code used to spawn fast-import, but the new bulk-checkin API replaces it. Signed-off-by: Junio C Hamano

Merge branch 'bc/attr-ignore-case'

2011-10-18T04:37:14Z

* bc/attr-ignore-case: attr.c: respect core.ignorecase when matching attribute patterns attr: read core.attributesfile from git_default_core_config builtin/mv.c: plug miniscule memory leak cleanup: use internal memory allocation wrapper functions everywhere attr.c: avoid inappropriate access to strbuf "buf" member Conflicts: transport-helper.c

environment.c: Fix an sparse "symbol not declared" warning

2011-10-09T20:20:54Z

In particular, sparse issues the following warning: environment.c:62:5: warning: symbol 'merge_log_config' was not \ declared. Should it be static? In order to supress the warning, we include the "fmt-merge-msg.h" header file, since it contains an appropriate extern declaration for the 'merge_log_config' variable. Signed-off-by: Ramsay Jones Signed-off-by: Junio C Hamano

fmt-merge-msg: use branch.$name.description

2011-10-07T17:11:47Z

This teaches "merge --log" and fmt-merge-msg to use branch description information when merging a local topic branch into the mainline. The description goes between the branch name label and the list of commit titles. The refactoring to share the common configuration parsing between merge and fmt-merge-msg needs to be made into a separate patch. Signed-off-by: Junio C Hamano

attr: read core.attributesfile from git_default_core_config

2011-10-06T20:54:32Z

This code calls git_config from a helper function to parse the config entry it is interested in. Calling git_config in this way may cause a problem if the helper function can be called after a previous call to git_config by another function since the second call to git_config may reset some variable to the value in the config file which was previously overridden. The above is not a problem in this case since the function passed to git_config only parses one config entry and the variable it sets is not assigned outside of the parsing function. But a programmer who desires all of the standard config options to be parsed may be tempted to modify git_attr_config() so that it falls back to git_default_config() and then it _would_ be vulnerable to the above described behavior. So, move the call to git_config up into the top-level cmd_* function and move the responsibility for parsing core.attributesfile into the main config file parser. Which is only the logical thing to do ;-) Signed-off-by: Brandon Casey Signed-off-by: Junio C Hamano