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real_pathdup(): fix callsites that wanted it to die on error

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In 4ac9006f83 (real_path: have callers use real_pathdup and
strbuf_realpath, 2016-12-12), we changed the xstrdup(real_path())
pattern to use real_pathdup() directly.

The problem with this change is that real_path() calls
strbuf_realpath() with die_on_error = 1 while real_pathdup() calls
it with die_on_error = 0. Meaning that in cases where real_path()
causes Git to die() with an error message, real_pathdup() is silent
and returns NULL instead.

The callers, however, are ill-prepared for that change, as they expect
the return value to be non-NULL (and otherwise the function died
with an appropriate error message).

Fix this by extending real_pathdup()'s signature to accept the
die_on_error flag and simply pass it through to strbuf_realpath(),
and then adjust all callers after a careful audit whether they would
handle NULLs well.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2017-03-08 16:43:40 +01:00
committed by Junio C Hamano
parent aac3eaa624
commit ce83eadd9a
9 changed files with 18 additions and 18 deletions
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4
setup.c
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@ -698,7 +698,7 @@ static const char *setup_discovered_git_dir(const char *gitdir,
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
if (offset != cwd->len && !is_absolute_path(gitdir))
gitdir = real_pathdup(gitdir);
gitdir = real_pathdup(gitdir, 1);
if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
@ -806,7 +806,7 @@ static int canonicalize_ceiling_entry(struct string_list_item *item,
/* Keep entry but do not canonicalize it */
return 1;
} else {
char *real_path = real_pathdup(ceil);
char *real_path = real_pathdup(ceil, 0);
if (!real_path) {
return 0;
}