[PATCH 2/3] parse-options: allow positivation of options starting, with no-
- From
René Scharfe <rene.scharfe@lsrfire.ath.cx>
- Date
- Feb 25, 2012, 19:14 UTC
- Message-ID
- <4F49332E.7070003@lsrfire.ath.cx>
- In-Reply-To
- <4F49317A.3080809@lsrfire.ath.cx>
Long options can be negated by adding no- right after the leading two dashes. This is useful e.g. to override options set by aliases.
For options that are defined to start with no- already, this looks a bit funny. Allow such options to also be negated by removing the prefix.
The following thirteen options are affected:
apply --no-add bisect--helper --no-checkout checkout-index --no-create clone --no-checkout --no-hardlinks commit --no-verify --no-post-rewrite format-patch --no-binary hash-object --no-filters read-tree --no-sparse-checkout revert --no-commit show-branch --no-name update-ref --no-deref
The following five are NOT affected because they are defined with PARSE_OPT_NONEG or the non-negated version is defined as well:
branch --no-merged format-patch --no-stat --no-numbered update-index --no-assume-unchanged --no-skip-worktree
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> --- Documentation/technical/api-parse-options.txt | 3 ++- parse-options.c | 27 ++++++++++++++++--------- t/t0040-parse-options.sh | 2 +- 3 files changed, 20 insertions(+), 12 deletions(-)
diff --git a/Documentation/technical/api-parse-options.txt b/Documentation/technical/api-parse-options.txt index 4b92514..2527b7e 100644 --- a/Documentation/technical/api-parse-options.txt +++ b/Documentation/technical/api-parse-options.txt @@ -39,7 +39,8 @@ The parse-options API allows: * Short options may be bundled, e.g. `-a -b` can be specified as `-ab`. * Boolean long options can be 'negated' (or 'unset') by prepending - `no-`, e.g. `\--no-abbrev` instead of `\--abbrev`. + `no-`, e.g. `\--no-abbrev` instead of `\--abbrev`. Conversely, + options that begin with `no-` can be 'negated' by removing it. * Options and non-option arguments can clearly be separated using the `\--` option, e.g. `-a -b \--option \-- \--this-is-a-file` indicates that diff --git a/parse-options.c b/parse-options.c index f0098eb..8906841 100644 --- a/parse-options.c +++ b/parse-options.c @@ -193,13 +193,14 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg, arg_end = arg + strlen(arg); for (; options->type != OPTION_END; options++) { - const char *rest; - int flags = 0; + const char *rest, *long_name = options->long_name; + int flags = 0, opt_flags = 0; - if (!options->long_name) + if (!long_name) continue; - rest = skip_prefix(arg, options->long_name); +again: + rest = skip_prefix(arg, long_name); if (options->type == OPTION_ARGUMENT) { if (!rest) continue; @@ -212,7 +213,7 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg, } if (!rest) { /* abbreviated? */ - if (!strncmp(options->long_name, arg, arg_end - arg)) { + if (!strncmp(long_name, arg, arg_end - arg)) { is_abbreviated: if (abbrev_option) { /* @@ -227,7 +228,7 @@ is_abbreviated: if (!(flags & OPT_UNSET) && *arg_end) p->opt = arg_end + 1; abbrev_option = options; - abbrev_flags = flags; + abbrev_flags = flags ^ opt_flags; continue; } /* negation allowed? */ @@ -239,12 +240,18 @@ is_abbreviated: goto is_abbreviated; } /* negated? */ - if (strncmp(arg, "no-", 3)) + if (prefixcmp(arg, "no-")) { + if (!prefixcmp(long_name, "no-")) { + long_name += 3; + opt_flags |= OPT_UNSET; + goto again; + } continue; + } flags |= OPT_UNSET; - rest = skip_prefix(arg + 3, options->long_name); + rest = skip_prefix(arg + 3, long_name); /* abbreviated and negated? */ - if (!rest && !prefixcmp(options->long_name, arg + 3)) + if (!rest && !prefixcmp(long_name, arg + 3)) goto is_abbreviated; if (!rest) continue; @@ -254,7 +261,7 @@ is_abbreviated: continue; p->opt = rest + 1; } - return get_value(p, options, flags); + return get_value(p, options, flags ^ opt_flags); } if (ambiguous_option) diff --git a/t/t0040-parse-options.sh b/t/t0040-parse-options.sh index 79aefe2..aa57299 100755 --- a/t/t0040-parse-options.sh +++ b/t/t0040-parse-options.sh @@ -107,7 +107,7 @@ test_expect_success 'OPT_BOOL() negation #2' 'check boolean: 0 -D --no-no-doubt' test_expect_success 'OPT_BOOL() no negation #1' 'check_unknown --fear' test_expect_success 'OPT_BOOL() no negation #2' 'check_unknown --no-no-fear' -test_expect_failure 'OPT_BOOL() positivation' 'check boolean: 0 -D --doubt' +test_expect_success 'OPT_BOOL() positivation' 'check boolean: 0 -D --doubt' cat > expect << EOF boolean: 2
-- 1.7.9.2