git-commit-vandalism/compat
Eric DeCosta 12fd27df79 fsmonitor: deal with synthetic firmlinks on macOS
Starting with macOS 10.15 (Catalina), Apple introduced a new feature
called 'firmlinks' in order to separate the boot volume into two
volumes, one read-only and one writable but still present them to the
user as a single volume. Along with this change, Apple removed the
ability to create symlinks in the root directory and replaced them with
'synthetic firmlinks'. See 'man synthetic.conf'

When FSEevents reports the path of changed files, if the path involves
a synthetic firmlink, the path is reported from the point of the
synthetic firmlink and not the real path. For example:

Real path:
/System/Volumes/Data/network/working/directory/foo.txt

Synthetic firmlink:
/network -> /System/Volumes/Data/network

FSEvents path:
/network/working/directory/foo.txt

This causes the FSEvents path to not match against the worktree
directory.

There are several ways in which synthetic firmlinks can be created:
they can be defined in /etc/synthetic.conf, the automounter can create
them, and there may be other means. Simply reading /etc/synthetic.conf
is insufficient. No matter what process creates synthetic firmlinks,
they all get created in the root directory.

Therefore, in order to deal with synthetic firmlinks, the root directory
is scanned and the first possible synthetic firmink that, when resolved,
is a prefix of the worktree is used to map FSEvents paths to worktree
paths.

Signed-off-by: Eric DeCosta <edecosta@mathworks.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-10-05 11:05:23 -07:00
..
fsmonitor fsmonitor: deal with synthetic firmlinks on macOS 2022-10-05 11:05:23 -07:00
linux tr2: log N parent process names on Linux 2021-09-07 11:08:00 -07:00
nedmalloc nedmalloc: avoid new compile error 2022-05-24 15:58:31 -07:00
poll mingw: workaround for hangs when sending STDIN 2020-02-27 14:23:29 -08:00
regex compat/regex: move stdlib.h up in inclusion chain 2020-04-27 11:21:16 -07:00
simple-ipc simple-ipc: work around issues with Cygwin's Unix socket emulation 2021-11-10 09:12:19 -08:00
stub tr2: make process info collection platform-generic 2021-07-22 13:35:20 -07:00
vcbuild Makefile: stop hardcoding {command,config}-list.h 2021-09-23 15:06:47 -07:00
win32 compat/win32: correct for incorrect compiler warning 2022-07-19 12:51:34 -07:00
.gitattributes Provide zlib's uncompress2 from compat/zlib-compat.c 2021-10-08 10:45:48 -07:00
access.c git-compat-util: work around for access(X_OK) under root 2019-04-25 17:49:44 +09:00
apple-common-crypto.h imap-send: use HMAC() function provided by OpenSSL 2016-04-08 11:45:47 -07:00
basename.c compat/basename.c: provide a dirname() compatibility function 2016-01-12 10:40:54 -08:00
bswap.h compat/bswap.h: don't assume MSVC is little-endian 2020-11-11 11:24:47 -08:00
compiler.h bugreport: add compiler info 2020-04-16 15:23:42 -07:00
fileno.c git-compat-util: work around for access(X_OK) under root 2019-04-25 17:49:44 +09:00
fopen.c git_fopen: fix a sparse 'not declared' warning 2017-05-26 12:33:55 +09:00
hstrerror.c compat/hstrerror: convert sprintf to snprintf 2015-09-25 10:18:18 -07:00
inet_ntop.c compat/inet_ntop: fix off-by-one in inet_ntop4 2015-09-25 10:18:18 -07:00
inet_pton.c Drop system includes from inet_pton/inet_ntop compatibility wrappers 2012-02-05 16:32:33 -08:00
memmem.c
mingw.c Merge branch 'js/lstat-mingw-enotdir-fix' 2022-08-08 13:13:14 -07:00
mingw.h Merge branch 'ns/batch-fsync' 2022-06-03 14:30:34 -07:00
mkdir.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
mkdtemp.c
mmap.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
msvc.c
msvc.h msvc: add pragmas for common warnings 2019-06-25 10:46:57 -07:00
obstack.c compat/obstack: fix -Wcast-function-type warnings 2019-01-17 11:13:38 -08:00
obstack.h obstack: avoid computing offsets from NULL pointer 2020-01-28 23:13:25 -08:00
open.c Makefile: add OPEN_RETURNS_EINTR knob 2021-02-26 14:15:51 -08:00
pread.c
precompose_utf8.c precompose_utf8: make precompose_string_if_needed() public 2021-04-05 17:30:04 -07:00
precompose_utf8.h precompose_utf8: make precompose_string_if_needed() public 2021-04-05 17:30:04 -07:00
qsort_s.c compat/qsort_s.c: avoid using potentially unaligned access 2022-01-07 14:20:58 -08:00
setenv.c use st_add and st_mult for allocation size computation 2016-02-22 14:51:09 -08:00
sha1-chunked.c sha1: allow limiting the size of the data passed to SHA1_Update() 2015-11-05 10:35:11 -08:00
sha1-chunked.h sha1: allow limiting the size of the data passed to SHA1_Update() 2015-11-05 10:35:11 -08:00
snprintf.c MSVC: vsnprintf in Visual Studio 2015 doesn't need SNPRINTF_SIZE_CORR any more 2016-03-30 11:13:01 -07:00
stat.c compat: convert modes to use portable file type values 2014-12-04 11:58:36 -08:00
strcasestr.c
strdup.c compat: move strdup(3) replacement to its own file 2016-09-07 10:41:45 -07:00
strlcpy.c
strtoimax.c Add strtoimax() compatibility function. 2011-11-02 13:06:30 -07:00
strtoumax.c
terminal.c terminal: restore settings on SIGTSTP 2022-03-16 12:24:44 -07:00
terminal.h terminal: don't assume stdin is /dev/tty 2022-03-16 12:24:43 -07:00
unsetenv.c unsetenv(3) returns int, not void 2021-10-29 15:00:58 -07:00
win32.h mingw: rename WIN32 cpp macro to GIT_WINDOWS_NATIVE 2013-05-08 12:14:35 -07:00
win32mmap.c mmap(win32): avoid expensive fstat() call 2016-04-22 15:01:16 -07:00
winansi.c wrapper: make inclusion of Windows csprng header tightly scoped 2022-03-10 15:10:22 -08:00
zlib-uncompress2.c compat: auto-detect if zlib has uncompress2() 2022-01-26 09:05:55 -08:00