config: make numeric parsing errors more clear

If we try to parse an integer config argument and get a
number outside of the representable range, we die with the
cryptic message: "bad config value for '%s'".

We can improve two things:

1. Show the value that produced the error (e.g., bad
config value '3g' for 'foo.bar').

2. Mention the reason the value was rejected (e.g.,
"invalid unit" versus "out of range").

A few tests need to be updated with the new output, but that
should not be representative of real-world breakage, as
scripts should not be depending on the exact text of our
stderr output, which is subject to i18n anyway.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/config.c b/config.c
index 9a42ad2ded7820b407247991dc3db4f326f44168..4be6c7ba2bc0b48de4e465ad2f4c26bd114c3729 100644 (file)
--- a/config.c
+++ b/config.c
@@ -543,18 +543,25 @@ int git_parse_ulong(const char *value, unsigned long *ret)
        return 1;
 }
 
-static void die_bad_config(const char *name)
+static void die_bad_number(const char *name, const char *value)
 {
+       const char *reason = errno == ERANGE ?
+                            "out of range" :
+                            "invalid unit";
+       if (!value)
+               value = "";
+
        if (cf && cf->name)
-               die("bad config value for '%s' in %s", name, cf->name);
-       die("bad config value for '%s'", name);
+               die("bad numeric config value '%s' for '%s' in %s: %s",
+                   value, name, cf->name, reason);
+       die("bad numeric config value '%s' for '%s': %s", value, name, reason);
 }
 
 int git_config_int(const char *name, const char *value)
 {
        int ret;
        if (!git_parse_int(value, &ret))
-               die_bad_config(name);
+               die_bad_number(name, value);
        return ret;
 }
 
@@ -562,7 +569,7 @@ unsigned long git_config_ulong(const char *name, const char *value)
 {
        unsigned long ret;
        if (!git_parse_ulong(value, &ret))
-               die_bad_config(name);
+               die_bad_number(name, value);
        return ret;
 }
 

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index c4a7d84f46fd218af1824ac1f78a1e9f4cb15cec..20aee6e171c41139007187d6155339d484f44d54 100755 (executable)
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -657,11 +657,11 @@ test_expect_success 'invalid unit' '
        echo 1auto >expect &&
        git config aninvalid.unit >actual &&
        test_cmp expect actual &&
-       cat > expect <<-\EOF
-       fatal: bad config value for '\''aninvalid.unit'\'' in .git/config
+       cat >expect <<-\EOF
+       fatal: bad numeric config value '\''1auto'\'' for '\''aninvalid.unit'\'' in .git/config: invalid unit
        EOF
        test_must_fail git config --int --get aninvalid.unit 2>actual &&
-       test_cmp actual expect
+       test_i18ncmp expect actual
 '
 
 cat > expect << EOF

diff --git a/t/t4055-diff-context.sh b/t/t4055-diff-context.sh
index 97172b46b2afd52ca8f278f9525da01a56823e59..cd0454356a6ea26c630f76748dd2c4f73bed8526 100755 (executable)
--- a/t/t4055-diff-context.sh
+++ b/t/t4055-diff-context.sh
@@ -73,7 +73,7 @@ test_expect_success 'plumbing not affected' '
 test_expect_success 'non-integer config parsing' '
        git config diff.context no &&
        test_must_fail git diff 2>output &&
-       test_i18ngrep "bad config value" output
+       test_i18ngrep "bad numeric config value" output
 '
 
 test_expect_success 'negative integer config parsing' '