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largefiles: access to specific fields only if largefiles enabled (issue4547)...
largefiles: access to specific fields only if largefiles enabled (issue4547) Even if largefiles extension is enabled in a repository, "repo" object, which isn't "largefiles.reposetup()"-ed, is passed to overridden functions in the cases below unexpectedly, because extensions are enabled for each repositories strictly. (1) clone without -U: (2) pull with -U: (3) pull with --rebase: combination of "enabled@src", "disabled@dst" and "not-required@src" cause this situation. largefiles requirement @src @dst @src result -------- -------- --------------- -------------------- enabled disabled not-required aborted unexpectedly required requirement error (intentional) -------- -------- --------------- -------------------- enabled enabled * success -------- -------- --------------- -------------------- disabled enabled * success (only for "pull") -------- -------- --------------- -------------------- disabled disabled not-required success required requirement error (intentional) -------- -------- --------------- -------------------- (4) update/revert with a subrepo disabling largefiles In these cases, overridden functions cause accessing to largefiles specific fields of not "largefiles.reposetup()"-ed "repo" object, and execution is aborted. - (1), (2), (4) cause accessing to "_lfstatuswriters" in "getstatuswriter()" invoked via "updatelfiles()" - (3) causes accessing to "_lfcommithooks" in "overriderebase()" For safe accessing to these fields, this patch examines whether passed "repo" object is "largefiles.reposetup()"-ed or not before accessing to them. This patch chooses examining existence of newly introduced "_largefilesenabled" instead of "_lfcommithooks" and "_lfstatuswriters" directly, because the former is better name for the generic "largefiles is enabled in this repo" mark than the latter. In the future, all other overridden functions should avoid largefiles specific processing for efficiency, and "_largefilesenabled" is better also for such purpose. BTW, "lfstatus" can't be used for such purpose, because some code paths set it forcibly regardless of existence of it in specified "repo" object.
Matt Mackall - - Load All Authors

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test-tools.t
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Tests of the file helper tool
$ f -h
?sage: f [options] [filenames] (glob)
?ptions: (glob)
-h, --help show this help message and exit
-t, --type show file type (file or directory)
-m, --mode show file mode
-l, --links show number of links
-s, --size show size of file
-n NEWER, --newer=NEWER
check if file is newer (or same)
-r, --recurse recurse into directories
-S, --sha1 show sha1 hash of the content
-M, --md5 show md5 hash of the content
-D, --dump dump file content
-H, --hexdump hexdump file content
-B BYTES, --bytes=BYTES
number of characters to dump
-L LINES, --lines=LINES
number of lines to dump
-q, --quiet no default output
$ mkdir dir
$ cd dir
$ f --size
size=0
$ echo hello | f --md5 --size
size=6, md5=b1946ac92492d2347c6235b4d2611184
$ f foo
foo: file not found
$ echo foo > foo
$ f foo
foo:
#if symlink
$ f foo --mode
foo: mode=644
#endif
$ seq 10 > bar
#if unix-permissions symlink
$ chmod +x bar
$ f bar --newer foo --mode --type --size --dump --links --bytes 7
bar: file, size=21, mode=755, links=1, newer than foo
>>>
1
2
3
4
<<< no trailing newline
#endif
#if unix-permissions
$ ln bar baz
$ f bar -n baz -l --hexdump -t --sha1 --lines=9 -B 20
bar: file, links=2, newer than baz, sha1=612ca68d0305c821750a
0000: 31 0a 32 0a 33 0a 34 0a 35 0a 36 0a 37 0a 38 0a |1.2.3.4.5.6.7.8.|
0010: 39 0a |9.|
$ rm baz
#endif
#if unix-permissions symlink
$ ln -s yadda l
$ f . --recurse -MStmsB4
.: directory with 3 files, mode=755
./bar: file, size=21, mode=755, md5=3b03, sha1=612c
./foo: file, size=4, mode=644, md5=d3b0, sha1=f1d2
./l: link, size=5, md5=2faa, sha1=af93
#endif
$ f --quiet bar -DL 3
1
2
3
$ cd ..
Yadda is a symlink
#if symlink
$ f -qr dir -HB 17
dir: directory with 3 files
dir/bar:
0000: 31 0a 32 0a 33 0a 34 0a 35 0a 36 0a 37 0a 38 0a |1.2.3.4.5.6.7.8.|
0010: 39 |9|
dir/foo:
0000: 66 6f 6f 0a |foo.|
dir/l:
0000: 79 61 64 64 61 |yadda|
#else
$ f -qr dir -HB 17
dir: directory with 2 files (esc)
dir/bar: (glob)
0000: 31 0a 32 0a 33 0a 34 0a 35 0a 36 0a 37 0a 38 0a |1.2.3.4.5.6.7.8.|
0010: 39 |9|
dir/foo: (glob)
0000: 66 6f 6f 0a |foo.|
#endif