[PATCH 6/7] ident: reject bogus email addresses with IDENT_STRICT

[Jeff King <peff@peff.net>]

If we come up with a hostname like "foo.(none)" because the
user's machine is not fully qualified, we should reject this
in strict mode (e.g., when we are making a commit object),
just as we reject an empty gecos username.

Signed-off-by: Jeff King <peff@peff.net>
---
Note that in conjunction with the previous patch, you can no longer "git
commit" with such a bogus address. I think this is a good thing.

However, it's possible some old-timers might disagree. I remember Linus
a long time ago mentioning that using the machine-name in the committer
line was a _feature_. These days he seems to set user.email to a real
address, though (and I think that is sane these days, because other
tools really want to do use identities as more than just a token. E.g.,
email tools, gpg-signing, etc).

 ident.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ident.c b/ident.c
index c42258f..ca098d9 100644
--- a/ident.c
+++ b/ident.c
@@ -288,6 +288,12 @@ const char *fmt_ident(const char *name, const char *email,
 		name = pw->pw_name;
 	}
 
+	if (strict && email == git_default_email.buf &&
+	    !strstr(email, "(none)")) {
+		fputs(env_hint, stderr);
+		die("unable to auto-detect email address (got '%s')", email);
+	}
+
 	if (want_date) {
 		if (date_str && date_str[0]) {
 			if (parse_date(date_str, date, sizeof(date)) < 0)
-- 
1.7.10.1.25.g7031a0f