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submodule init: fail gracefully with a missing .gitmodules file

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When there is no .gitmodules file availabe to initialize a submodule
from, `submodule_from_path` just returns NULL. We need to check for
that and abort gracefully. When `submodule init` was implemented in shell,
a missing .gitmodules file would result in an error message

    No url found for submodule path '%s' in .gitmodules

Replicate that error message for now.

When the .gitmodules file is missing we can probably fail even earlier
for all of the submodules with an improved error message.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
2016-04-28 13:02:45 -07:00
committed by Junio C Hamano
parent 3604242f08
commit d92028a575
2 changed files with 15 additions and 3 deletions
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10
builtin/submodule--helper.c
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@ -314,13 +314,17 @@ static void init_submodule(const char *path, const char *prefix, int quiet)
/* Only loads from .gitmodules, no overlay with .git/config */
gitmodules_config();
sub = submodule_from_path(null_sha1, path);
if (prefix) {
strbuf_addf(&sb, "%s%s", prefix, path);
displaypath = strbuf_detach(&sb, NULL);
} else
displaypath = xstrdup(sub->path);
displaypath = xstrdup(path);
sub = submodule_from_path(null_sha1, path);
if (!sub)
die(_("No url found for submodule path '%s' in .gitmodules"),
displaypath);
/*
* Copy url setting when it is not set yet.