2005-06-13 19:06:50 +02:00
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/*
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* rev-parse.c
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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2005-06-21 05:28:09 +02:00
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#include "commit.h"
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2005-07-03 22:07:52 +02:00
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#include "refs.h"
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2005-09-20 23:13:24 +02:00
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#include "quote.h"
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2005-06-21 05:28:09 +02:00
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2005-08-24 23:30:04 +02:00
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#define DO_REVS 1
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#define DO_NOREV 2
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#define DO_FLAGS 4
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#define DO_NONFLAGS 8
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static int filter = ~0;
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2005-06-24 19:12:55 +02:00
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static char *def = NULL;
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2005-06-26 20:34:30 +02:00
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#define NORMAL 0
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#define REVERSED 1
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static int show_type = NORMAL;
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2005-08-24 23:30:04 +02:00
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static int symbolic = 0;
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static int output_sq = 0;
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static int revs_count = 0;
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2005-06-26 20:34:30 +02:00
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2005-06-13 20:14:20 +02:00
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/*
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* Some arguments are relevant "revision" arguments,
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* others are about output format or other details.
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* This sorts it all out.
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*/
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static int is_rev_argument(const char *arg)
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{
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static const char *rev_args[] = {
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2005-10-05 23:49:54 +02:00
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"--all",
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2005-08-24 23:30:04 +02:00
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"--bisect",
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2005-10-30 10:08:35 +01:00
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"--dense",
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2005-08-24 23:30:04 +02:00
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"--header",
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2005-06-13 20:14:20 +02:00
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"--max-age=",
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2005-08-24 23:30:04 +02:00
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"--max-count=",
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2005-06-13 20:14:20 +02:00
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"--merge-order",
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2005-08-24 23:30:04 +02:00
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"--min-age=",
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2005-08-09 04:31:37 +02:00
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"--no-merges",
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2005-08-24 23:30:04 +02:00
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"--objects",
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"--parents",
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"--pretty",
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"--show-breaks",
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2005-10-30 10:08:35 +01:00
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"--sparse",
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2005-08-24 23:30:04 +02:00
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"--topo-order",
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"--unpacked",
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2005-06-13 20:14:20 +02:00
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NULL
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};
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const char **p = rev_args;
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for (;;) {
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const char *str = *p++;
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int len;
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if (!str)
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return 0;
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len = strlen(str);
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2005-08-24 23:30:04 +02:00
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if (!strcmp(arg, str) ||
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(str[len-1] == '=' && !strncmp(arg, str, len)))
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2005-06-13 20:14:20 +02:00
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return 1;
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}
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}
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2005-08-24 23:30:04 +02:00
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/* Output argument as a string, either SQ or normal */
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[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF
The git-rev-parse command uses LF to separate each argument it
parses, so its users at least need to set IFS to LF to be able
to handle filenames with embedded SPs and TABs. Some commands,
however, can take and do expect arguments with embedded LF,
notably, "-S" (pickaxe) of diff family, so even this workaround
does not work for them.
When --sq flag to git-rev-parse is given, instead of showing one
argument per line, it outputs arguments quoted for consumption
with "eval" by the caller, to remedy this situation.
As an example, this patch converts git-whatchanged to use this
new feature.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-23 04:08:32 +02:00
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static void show(const char *arg)
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{
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if (output_sq) {
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int sq = '\'', ch;
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putchar(sq);
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while ((ch = *arg++)) {
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if (ch == sq)
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fputs("'\\'", stdout);
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putchar(ch);
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}
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putchar(sq);
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putchar(' ');
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}
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else
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puts(arg);
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}
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2005-08-24 23:30:04 +02:00
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/* Output a revision, only if filter allows it */
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2005-08-16 21:36:46 +02:00
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static void show_rev(int type, const unsigned char *sha1, const char *name)
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2005-06-24 19:12:55 +02:00
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{
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2005-08-24 23:30:04 +02:00
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if (!(filter & DO_REVS))
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2005-06-24 19:12:55 +02:00
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return;
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2005-08-24 23:30:04 +02:00
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def = NULL;
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revs_count++;
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[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF
The git-rev-parse command uses LF to separate each argument it
parses, so its users at least need to set IFS to LF to be able
to handle filenames with embedded SPs and TABs. Some commands,
however, can take and do expect arguments with embedded LF,
notably, "-S" (pickaxe) of diff family, so even this workaround
does not work for them.
When --sq flag to git-rev-parse is given, instead of showing one
argument per line, it outputs arguments quoted for consumption
with "eval" by the caller, to remedy this situation.
As an example, this patch converts git-whatchanged to use this
new feature.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-23 04:08:32 +02:00
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2005-08-16 21:36:46 +02:00
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if (type != show_type)
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putchar('^');
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if (symbolic && name)
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show(name);
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else
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show(sha1_to_hex(sha1));
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2005-06-24 19:12:55 +02:00
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}
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2005-08-24 23:30:04 +02:00
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/* Output a flag, only if filter allows it. */
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static void show_flag(char *arg)
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2005-06-24 19:12:55 +02:00
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{
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2005-08-24 23:30:04 +02:00
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if (!(filter & DO_FLAGS))
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2005-06-24 19:12:55 +02:00
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return;
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2005-08-24 23:30:04 +02:00
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if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV))
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2005-08-23 19:47:54 +02:00
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show(arg);
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2005-06-24 19:12:55 +02:00
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}
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static void show_default(void)
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{
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char *s = def;
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if (s) {
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unsigned char sha1[20];
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def = NULL;
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2005-08-04 07:15:49 +02:00
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if (!get_sha1(s, sha1)) {
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2005-08-16 21:36:46 +02:00
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show_rev(NORMAL, sha1, s);
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2005-06-24 19:12:55 +02:00
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return;
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}
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}
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}
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2005-07-03 22:07:52 +02:00
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static int show_reference(const char *refname, const unsigned char *sha1)
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{
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2005-08-16 21:36:46 +02:00
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show_rev(NORMAL, sha1, refname);
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2005-07-03 22:07:52 +02:00
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return 0;
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}
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2005-09-20 23:13:24 +02:00
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static void show_datestring(const char *flag, const char *datestr)
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{
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static char buffer[100];
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/* date handling requires both flags and revs */
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if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
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return;
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git's rev-parse.c function show_datestring presumes gnu date
Ok. This is the insane patch to do this.
It really isn't very careful, and the reason I call it "approxidate()"
will become obvious when you look at the code. It is very liberal in what
it accepts, to the point where sometimes the results may not make a whole
lot of sense.
It accepts "last week" as a date string, by virtue of "last" parsing as
the number 1, and it totally ignoring superfluous fluff like "ago", so
"last week" ends up being exactly the same thing as "1 week ago". Fine so
far.
It has strange side effects: "last december" will actually parse as "Dec
1", which actually _does_ turn out right, because it will then notice that
it's not December yet, so it will decide that you must be talking about a
date last year. So it actually gets it right, but it's kind of for the
"wrong" reasons.
It also accepts the numbers 1..10 in string format ("one" .. "ten"), so
you can do "ten weeks ago" or "ten hours ago" and it will do the right
thing.
But it will do some really strange thigns too: the string "this will last
forever", will not recognize anyting but "last", which is recognized as
"1", which since it doesn't understand anything else it will think is the
day of the month. So if you do
gitk --since="this will last forever"
the date will actually parse as the first day of the current month.
And it will parse the string "now" as "now", but only because it doesn't
understand it at all, and it makes everything relative to "now".
Similarly, it doesn't actually parse the "ago" or "from now", so "2 weeks
ago" is exactly the same as "2 weeks from now". It's the current date
minus 14 days.
But hey, it's probably better (and certainly faster) than depending on GNU
date. So now you can portably do things like
gitk --since="two weeks and three days ago"
git log --since="July 5"
git-whatchanged --since="10 hours ago"
git log --since="last october"
and it will actually do exactly what you thought it would do (I think). It
will count 17 days backwards, and it will do so even if you don't have GNU
date installed.
(I don't do "last monday" or similar yet, but I can extend it to that too
if people want).
It was kind of fun trying to write code that uses such totally relaxed
"understanding" of dates yet tries to get it right for the trivial cases.
The result should be mixed with a few strange preprocessor tricks, and be
submitted for the IOCCC ;)
Feel free to try it out, and see how many strange dates it gets right. Or
wrong.
And if you find some interesting (and valid - not "interesting" as in
"strange", but "interesting" as in "I'd be interested in actually doing
this) thing it gets wrong - usually by not understanding it and silently
just doing some strange things - please holler.
Now, as usual this certainly hasn't been getting a lot of testing. But my
code always works, no?
Linus
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-15 04:29:06 +01:00
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snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
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2005-09-20 23:13:24 +02:00
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show(buffer);
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}
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2005-10-18 09:16:45 +02:00
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static void show_file(const char *arg)
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{
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2005-10-26 00:24:55 +02:00
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show_default();
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2005-10-18 09:16:45 +02:00
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if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV))
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show(arg);
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}
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2005-06-13 19:06:50 +02:00
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int main(int argc, char **argv)
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{
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2005-08-24 23:30:04 +02:00
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int i, as_is = 0, verify = 0;
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2005-06-13 19:06:50 +02:00
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unsigned char sha1[20];
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2005-08-17 03:06:34 +02:00
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const char *prefix = setup_git_directory();
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2005-06-13 19:06:50 +02:00
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for (i = 1; i < argc; i++) {
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char *arg = argv[i];
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char *dotdot;
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if (as_is) {
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2005-10-18 09:16:45 +02:00
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show_file(arg);
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2005-06-13 19:06:50 +02:00
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continue;
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}
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if (*arg == '-') {
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if (!strcmp(arg, "--")) {
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as_is = 1;
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2005-10-21 02:16:30 +02:00
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/* Pass on the "--" if we show anything but files.. */
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if (filter & (DO_FLAGS | DO_REVS))
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show_file(arg);
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2005-08-24 23:30:04 +02:00
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continue;
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2005-06-13 19:06:50 +02:00
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}
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if (!strcmp(arg, "--default")) {
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def = argv[i+1];
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i++;
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continue;
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}
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2005-06-13 19:21:11 +02:00
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if (!strcmp(arg, "--revs-only")) {
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2005-08-24 23:30:04 +02:00
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filter &= ~DO_NOREV;
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2005-06-13 19:21:11 +02:00
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continue;
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}
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if (!strcmp(arg, "--no-revs")) {
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2005-08-24 23:30:04 +02:00
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filter &= ~DO_REVS;
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2005-06-13 19:21:11 +02:00
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continue;
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}
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2005-07-06 19:08:08 +02:00
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if (!strcmp(arg, "--flags")) {
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2005-08-24 23:30:04 +02:00
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filter &= ~DO_NONFLAGS;
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2005-07-06 19:08:08 +02:00
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continue;
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}
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if (!strcmp(arg, "--no-flags")) {
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2005-08-24 23:30:04 +02:00
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filter &= ~DO_FLAGS;
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2005-07-06 19:08:08 +02:00
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continue;
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}
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2005-06-24 19:12:55 +02:00
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if (!strcmp(arg, "--verify")) {
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2005-08-24 23:30:04 +02:00
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filter &= ~(DO_FLAGS|DO_NOREV);
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verify = 1;
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2005-06-24 19:12:55 +02:00
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continue;
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2005-06-13 20:14:20 +02:00
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}
|
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF
The git-rev-parse command uses LF to separate each argument it
parses, so its users at least need to set IFS to LF to be able
to handle filenames with embedded SPs and TABs. Some commands,
however, can take and do expect arguments with embedded LF,
notably, "-S" (pickaxe) of diff family, so even this workaround
does not work for them.
When --sq flag to git-rev-parse is given, instead of showing one
argument per line, it outputs arguments quoted for consumption
with "eval" by the caller, to remedy this situation.
As an example, this patch converts git-whatchanged to use this
new feature.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-23 04:08:32 +02:00
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if (!strcmp(arg, "--sq")) {
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output_sq = 1;
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continue;
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}
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2005-06-26 20:34:30 +02:00
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if (!strcmp(arg, "--not")) {
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show_type ^= REVERSED;
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continue;
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}
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2005-08-16 21:36:46 +02:00
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if (!strcmp(arg, "--symbolic")) {
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symbolic = 1;
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continue;
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}
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2005-07-03 22:07:52 +02:00
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if (!strcmp(arg, "--all")) {
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for_each_ref(show_reference);
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continue;
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}
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2005-08-17 03:06:34 +02:00
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if (!strcmp(arg, "--show-prefix")) {
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2005-08-24 23:30:04 +02:00
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if (prefix)
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puts(prefix);
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2005-08-17 03:06:34 +02:00
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continue;
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}
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2005-12-23 07:35:38 +01:00
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if (!strcmp(arg, "--show-cdup")) {
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const char *pfx = prefix;
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while (pfx) {
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pfx = strchr(pfx, '/');
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if (pfx) {
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pfx++;
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printf("../");
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}
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}
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putchar('\n');
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continue;
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}
|
2005-09-18 20:18:30 +02:00
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if (!strcmp(arg, "--git-dir")) {
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const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
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static char cwd[PATH_MAX];
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if (gitdir) {
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puts(gitdir);
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continue;
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}
|
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|
|
if (!prefix) {
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puts(".git");
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|
continue;
|
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|
}
|
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|
if (!getcwd(cwd, PATH_MAX))
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die("unable to get current working directory");
|
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|
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printf("%s/.git\n", cwd);
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continue;
|
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|
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}
|
2005-09-20 23:13:24 +02:00
|
|
|
if (!strncmp(arg, "--since=", 8)) {
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|
show_datestring("--max-age=", arg+8);
|
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|
|
continue;
|
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|
|
}
|
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|
if (!strncmp(arg, "--after=", 8)) {
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|
show_datestring("--max-age=", arg+8);
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|
|
continue;
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|
}
|
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|
|
if (!strncmp(arg, "--before=", 9)) {
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|
show_datestring("--min-age=", arg+9);
|
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|
|
continue;
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|
|
}
|
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|
|
if (!strncmp(arg, "--until=", 8)) {
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|
|
show_datestring("--min-age=", arg+8);
|
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|
|
continue;
|
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|
|
}
|
2005-08-24 23:30:04 +02:00
|
|
|
if (verify)
|
|
|
|
die("Needed a single revision");
|
|
|
|
show_flag(arg);
|
2005-06-13 19:06:50 +02:00
|
|
|
continue;
|
|
|
|
}
|
2005-08-24 23:30:04 +02:00
|
|
|
|
|
|
|
/* Not a flag argument */
|
2005-06-13 19:06:50 +02:00
|
|
|
dotdot = strstr(arg, "..");
|
|
|
|
if (dotdot) {
|
|
|
|
unsigned char end[20];
|
|
|
|
char *n = dotdot+2;
|
|
|
|
*dotdot = 0;
|
2005-08-04 07:15:49 +02:00
|
|
|
if (!get_sha1(arg, sha1)) {
|
2005-06-13 19:06:50 +02:00
|
|
|
if (!*n)
|
|
|
|
n = "HEAD";
|
2005-08-04 07:15:49 +02:00
|
|
|
if (!get_sha1(n, end)) {
|
2005-08-16 21:36:46 +02:00
|
|
|
show_rev(NORMAL, end, n);
|
|
|
|
show_rev(REVERSED, sha1, arg);
|
2005-06-13 19:06:50 +02:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*dotdot = '.';
|
|
|
|
}
|
2005-08-04 07:15:49 +02:00
|
|
|
if (!get_sha1(arg, sha1)) {
|
2005-08-16 21:36:46 +02:00
|
|
|
show_rev(NORMAL, sha1, arg);
|
2005-06-20 17:29:13 +02:00
|
|
|
continue;
|
|
|
|
}
|
2005-08-04 07:15:49 +02:00
|
|
|
if (*arg == '^' && !get_sha1(arg+1, sha1)) {
|
2005-08-16 21:36:46 +02:00
|
|
|
show_rev(REVERSED, sha1, arg+1);
|
2005-06-20 17:29:13 +02:00
|
|
|
continue;
|
|
|
|
}
|
2005-08-24 23:30:04 +02:00
|
|
|
if (verify)
|
|
|
|
die("Needed a single revision");
|
Be more careful about reference parsing
This does two things:
- we don't allow "." and ".." as components of a refname. Thus get_sha1()
will not accept "./refname" as being the same as "refname" any more.
- git-rev-parse stops doing revision translation after seeing a pathname,
to match the brhaviour of all the tools (once we see a pathname,
everything else will also be parsed as a pathname).
Basically, if you did
git log *
and "gitk" was somewhere in the "*", we don't want to replace the filename
"gitk" with the SHA1 of the branch with the same name.
Of course, if there is any change of ambiguity, you should always use "--"
to make it explicit what are filenames and what are revisions, but this
makes the normal cases sane. The refname rule also means that instead of
the "--", you can do the same thing we're used to doing with filenames
that start with a slash: use "./filename" instead, and now it's a
filename, not an option (and not a revision).
So "git log ./*.c" is now actually a perfectly valid thing to do, even if
the first C-file might have the same name as a branch.
Trivial test:
git-rev-parse gitk ./gitk gitk
should output something like
9843c3074dfbf57117565f6b7c93e3e6812857ee
./gitk
gitk
where the "./gitk" isn't seen as a revision, and the second "gitk" is a
filename simply because we've seen filenames already, and thus stopped
doing revision parsing.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-10-28 21:41:49 +02:00
|
|
|
as_is = 1;
|
2005-10-18 09:16:45 +02:00
|
|
|
show_file(arg);
|
2005-06-24 19:12:55 +02:00
|
|
|
}
|
|
|
|
show_default();
|
2005-08-24 23:30:04 +02:00
|
|
|
if (verify && revs_count != 1)
|
|
|
|
die("Needed a single revision");
|
2005-06-13 19:06:50 +02:00
|
|
|
return 0;
|
|
|
|
}
|