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diff: parse separate options like -S foo

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Change the option parsing logic in revision.c to accept separate forms
like `-S foo' in addition to `-Sfoo'. The rest of git already accepted
this form, but revision.c still used its own option parsing.

Short options affected are -S<string>, -l<num> and -O<orderfile>, for
which an empty string wouldn't make sense, hence -<option> <arg> isn't
ambiguous.

This patch does not handle --stat-name-width and --stat-width, which are
special-cases where diff_long_opt do not apply. They are handled in a
separate patch to ease review.

Original patch by Matthieu Moy, plus refactoring by Jonathan Nieder.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Matthieu Moy
2010-08-05 10:22:52 +02:00
committed by Junio C Hamano
parent 64fdc08dac
commit dea007fb4c
5 changed files with 95 additions and 23 deletions
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87
diff.c
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@ -2990,9 +2990,50 @@ static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *va
static int diff_scoreopt_parse(const char *opt);
static inline int short_opt(char opt, const char **argv,
const char **optarg)
{
const char *arg = argv[0];
if (arg[0] != '-' || arg[1] != opt)
return 0;
if (arg[2] != '\0') {
*optarg = arg + 2;
return 1;
}
if (!argv[1])
die("Option '%c' requires a value", opt);
*optarg = argv[1];
return 2;
}
int parse_long_opt(const char *opt, const char **argv,
const char **optarg)
{
const char *arg = argv[0];
if (arg[0] != '-' || arg[1] != '-')
return 0;
arg += strlen("--");
if (prefixcmp(arg, opt))
return 0;
arg += strlen(opt);
if (*arg == '=') { /* sticked form: --option=value */
*optarg = arg + 1;
return 1;
}
if (*arg != '\0')
return 0;
/* separate form: --option value */
if (!argv[1])
die("Option '--%s' requires a value", opt);
*optarg = argv[1];
return 2;
}
int diff_opt_parse(struct diff_options *options, const char **av, int ac)
{
const char *arg = av[0];
const char *optarg;
int argcount;
/* Output format options */
if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch"))
@ -3149,10 +3190,11 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
else
die("bad --word-diff argument: %s", type);
}
else if (!prefixcmp(arg, "--word-diff-regex=")) {
else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) {
if (options->word_diff == DIFF_WORDS_NONE)
options->word_diff = DIFF_WORDS_PLAIN;
options->word_regex = arg + 18;
options->word_regex = optarg;
return argcount;
}
else if (!strcmp(arg, "--exit-code"))
DIFF_OPT_SET(options, EXIT_WITH_STATUS);
@ -3180,18 +3222,26 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
/* misc options */
else if (!strcmp(arg, "-z"))
options->line_termination = 0;
else if (!prefixcmp(arg, "-l"))
options->rename_limit = strtoul(arg+2, NULL, 10);
else if (!prefixcmp(arg, "-S"))
options->pickaxe = arg + 2;
else if ((argcount = short_opt('l', av, &optarg))) {
options->rename_limit = strtoul(optarg, NULL, 10);
return argcount;
}
else if ((argcount = short_opt('S', av, &optarg))) {
options->pickaxe = optarg;
return argcount;
}
else if (!strcmp(arg, "--pickaxe-all"))
options->pickaxe_opts = DIFF_PICKAXE_ALL;
else if (!strcmp(arg, "--pickaxe-regex"))
options->pickaxe_opts = DIFF_PICKAXE_REGEX;
else if (!prefixcmp(arg, "-O"))
options->orderfile = arg + 2;
else if (!prefixcmp(arg, "--diff-filter="))
options->filter = arg + 14;
else if ((argcount = short_opt('O', av, &optarg))) {
options->orderfile = optarg;
return argcount;
}
else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) {
options->filter = optarg;
return argcount;
}
else if (!strcmp(arg, "--abbrev"))
options->abbrev = DEFAULT_ABBREV;
else if (!prefixcmp(arg, "--abbrev=")) {
@ -3201,20 +3251,25 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
else if (40 < options->abbrev)
options->abbrev = 40;
}
else if (!prefixcmp(arg, "--src-prefix="))
options->a_prefix = arg + 13;
else if (!prefixcmp(arg, "--dst-prefix="))
options->b_prefix = arg + 13;
else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) {
options->a_prefix = optarg;
return argcount;
}
else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) {
options->b_prefix = optarg;
return argcount;
}
else if (!strcmp(arg, "--no-prefix"))
options->a_prefix = options->b_prefix = "";
else if (opt_arg(arg, '\0', "inter-hunk-context",
&options->interhunkcontext))
;
else if (!prefixcmp(arg, "--output=")) {
options->file = fopen(arg + strlen("--output="), "w");
else if ((argcount = parse_long_opt("output", av, &optarg))) {
options->file = fopen(optarg, "w");
if (!options->file)
die_errno("Could not open '%s'", arg + strlen("--output="));
options->close_file = 1;
return argcount;
} else
return 0;
return 1;