pathspec: stop --*-pathspecs impact on internal parse_pathspec() uses

Normally parse_pathspec() is used on command line arguments where it
can do fancy thing like parsing magic on each argument or adding magic
for all pathspecs based on --*-pathspecs options.

There's another use of parse_pathspec(), where pathspec is needed, but
the input is known to be pure paths. In this case we usually don't
want --*-pathspecs to interfere. And we definitely do not want to
parse magic in these paths, regardless of --literal-pathspecs.

Add new flag PATHSPEC_LITERAL_PATH for this purpose. When it's set,
--*-pathspecs are ignored, no magic is parsed. And if the caller
allows PATHSPEC_LITERAL (i.e. the next calls can take literal magic),
then PATHSPEC_LITERAL will be set.

This fixes cases where git chokes when GIT_*_PATHSPECS are set because
parse_pathspec() indicates it won't take any magic. But
GIT_*_PATHSPECS add them anyway. These are

   export GIT_LITERAL_PATHSPECS=1
   git blame -- something
   git log --follow something
   git log --merge

"git ls-files --with-tree=path" (aka parse_pathspec() in
overlay_tree_on_cache()) is safe because the input is empty, and
producing one pathspec due to PATHSPEC_PREFER_CWD does not take any
magic into account.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2013-10-26 09:09:20 +07:00 committed by Junio C Hamano
parent 3d092bfc6f
commit 4a2d5ae262
6 changed files with 30 additions and 4 deletions

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@ -409,7 +409,9 @@ static struct origin *find_origin(struct scoreboard *sb,
paths[0] = origin->path; paths[0] = origin->path;
paths[1] = NULL; paths[1] = NULL;
parse_pathspec(&diff_opts.pathspec, PATHSPEC_ALL_MAGIC, 0, "", paths); parse_pathspec(&diff_opts.pathspec,
PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
PATHSPEC_LITERAL_PATH, "", paths);
diff_setup_done(&diff_opts); diff_setup_done(&diff_opts);
if (is_null_sha1(origin->commit->object.sha1)) if (is_null_sha1(origin->commit->object.sha1))

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@ -128,7 +128,11 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
die(_("global 'literal' pathspec setting is incompatible " die(_("global 'literal' pathspec setting is incompatible "
"with all other global pathspec settings")); "with all other global pathspec settings"));
if (elt[0] != ':' || literal_global) { if (flags & PATHSPEC_LITERAL_PATH)
global_magic = 0;
if (elt[0] != ':' || literal_global ||
(flags & PATHSPEC_LITERAL_PATH)) {
; /* nothing to do */ ; /* nothing to do */
} else if (elt[1] == '(') { } else if (elt[1] == '(') {
/* longhand */ /* longhand */
@ -405,6 +409,9 @@ void parse_pathspec(struct pathspec *pathspec,
item[i].magic = prefix_pathspec(item + i, &short_magic, item[i].magic = prefix_pathspec(item + i, &short_magic,
argv + i, flags, argv + i, flags,
prefix, prefixlen, entry); prefix, prefixlen, entry);
if ((flags & PATHSPEC_LITERAL_PATH) &&
!(magic_mask & PATHSPEC_LITERAL))
item[i].magic |= PATHSPEC_LITERAL;
if (item[i].magic & magic_mask) if (item[i].magic & magic_mask)
unsupported_magic(entry, unsupported_magic(entry,
item[i].magic & magic_mask, item[i].magic & magic_mask,

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@ -58,6 +58,13 @@ struct pathspec {
#define PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE (1<<5) #define PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE (1<<5)
#define PATHSPEC_PREFIX_ORIGIN (1<<6) #define PATHSPEC_PREFIX_ORIGIN (1<<6)
#define PATHSPEC_KEEP_ORDER (1<<7) #define PATHSPEC_KEEP_ORDER (1<<7)
/*
* For the callers that just need pure paths from somewhere else, not
* from command line. Global --*-pathspecs options are ignored. No
* magic is parsed in each pathspec either. If PATHSPEC_LITERAL is
* allowed, then it will automatically set for every pathspec.
*/
#define PATHSPEC_LITERAL_PATH (1<<8)
extern void parse_pathspec(struct pathspec *pathspec, extern void parse_pathspec(struct pathspec *pathspec,
unsigned magic_mask, unsigned magic_mask,

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@ -1372,7 +1372,8 @@ static void prepare_show_merge(struct rev_info *revs)
i++; i++;
} }
free_pathspec(&revs->prune_data); free_pathspec(&revs->prune_data);
parse_pathspec(&revs->prune_data, PATHSPEC_ALL_MAGIC, 0, "", prune); parse_pathspec(&revs->prune_data, PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
PATHSPEC_LITERAL_PATH, "", prune);
revs->limited = 1; revs->limited = 1;
} }

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@ -108,6 +108,13 @@ test_expect_success 'no-glob environment variable works' '
test_cmp expect actual test_cmp expect actual
' '
test_expect_success 'blame takes global pathspec flags' '
git --literal-pathspecs blame -- foo &&
git --icase-pathspecs blame -- foo &&
git --glob-pathspecs blame -- foo &&
git --noglob-pathspecs blame -- foo
'
test_expect_success 'setup xxx/bar' ' test_expect_success 'setup xxx/bar' '
mkdir xxx && mkdir xxx &&
test_commit xxx xxx/bar test_commit xxx xxx/bar

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@ -254,7 +254,9 @@ static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, co
path[0] = p->one->path; path[0] = p->one->path;
path[1] = NULL; path[1] = NULL;
free_pathspec(&opt->pathspec); free_pathspec(&opt->pathspec);
parse_pathspec(&opt->pathspec, PATHSPEC_ALL_MAGIC, 0, "", path); parse_pathspec(&opt->pathspec,
PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
PATHSPEC_LITERAL_PATH, "", path);
/* /*
* The caller expects us to return a set of vanilla * The caller expects us to return a set of vanilla