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[PATCH v3 2/6] config: report correct line number upon error

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Jun 13, 2017, 12:04 UTC
Message-ID
<e9698a39789f51a4e3cdff41bfeeba9fe46be605.1497355444.git.johannes.schindelin@gmx.de>
In-Reply-To
<cover.1497355444.git.johannes.schindelin@gmx.de>

When get_value() parses a key/value pair, it is possible that the line number is decreased (because the \n has been consumed already) before the key/value pair is passed to the callback function, to allow for the correct line to be attributed in case of an error.

However, when git_parse_source() asks get_value() to parse the key/value pair, the error reporting is performed *after* get_value() returns.

Which means that we have to be careful not to increase the line number in get_value() after the callback function returned an error.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 config.c               | 3 ++-
 t/t1300-repo-config.sh | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/config.c b/config.c
index 146cb3452ad..12c172e298a 100644
--- a/config.c
+++ b/config.c
@@ -604,7 +604,8 @@ static int get_value(config_fn_t fn, void *data, struct strbuf *name)
 	 */
 	cf->linenr--;
 	ret = fn(name->buf, value, data);
-	cf->linenr++;
+	if (ret >= 0)
+		cf->linenr++;
 	return ret;
 }
 
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 13b7851f7c2..a37ef042221 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -703,6 +703,12 @@ test_expect_success 'invalid unit' '
 	test_i18ngrep "bad numeric config value .1auto. for .aninvalid.unit. in file .git/config: invalid unit" actual
 '
 
+test_expect_success 'line number is reported correctly' '
+	printf "[bool]\n\tvar\n" >invalid &&
+	test_must_fail git config -f invalid --path bool.var 2>actual &&
+	test_i18ngrep "line 2" actual
+'
+
 test_expect_success 'invalid stdin config' '
 	echo "[broken" | test_must_fail git config --list --file - >output 2>&1 &&
 	test_i18ngrep "bad config line 1 in standard input" output
-- 
2.13.0.windows.1.460.g13f583bedb5
Previous: Johannes SchindelinNext: Johannes Schindelin
Message 4 of 15 in “Avoid problem where git_dir is set after alias expansion”
  1. 0/6 Avoid problem where git_dir is set after alias expansionJohannes Schindelin, Jun 13, 2017
  2. 1/6 discover_git_directory(): avoid setting invalid git_dirJohannes Schindelin, Jun 13, 2017
  3. 3/6 help: use early config when autocorrecting aliasesJohannes Schindelin, Jun 13, 2017
  4. 2/6 config: report correct line number upon errorJohannes Schindelin, Jun 13, 2017
  5. 4/6 t1308: relax the test verifying that empty alias values are disallowedJohannes Schindelin, Jun 13, 2017
  6. 5/6 t7006: demonstrate a problem with aliases in subdirectoriesJohannes Schindelin, Jun 13, 2017
  7. 6/6 Use the early config machinery to expand aliasesJohannes Schindelin, Jun 13, 2017
  8. Junio C HamanoJun 13, 2017
  9. Jeff KingJun 14, 2017
  10. Johannes SchindelinJun 14, 2017
  11. Johannes SchindelinJun 14, 2017
  12. Brandon WilliamsJun 13, 2017
  13. Jeff KingJun 14, 2017
  14. Johannes SchindelinJun 14, 2017
  15. Brandon WilliamsJun 14, 2017

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