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From: "Garima Singh via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: garimasigit@gmail.com, jeffhost@microsoft.com, stolee@gmail.com,
	Junio C Hamano <gitster@pobox.com>,
	Garima Singh <garima.singh@microsoft.com>
Subject: [PATCH v4 1/1] sq_quote_buf_pretty: don't drop empty arguments
Date: Mon, 07 Oct 2019 12:38:56 -0700 (PDT)
Message-ID: <a6a0217ce6fa2a7436724d76fc50fd6f8b925de5.1570477135.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.314.v4.git.gitgitgadget@gmail.com>

From: Garima Singh <garima.singh@microsoft.com>

Empty arguments passed on the command line can be a represented by
a '', however sq_quote_buf_pretty was incorrectly dropping these
arguments altogether. Fix this problem by ensuring that such
arguments are emitted as '' instead.

Reported by: Junio Hamano <gitster@pobox.com>
Signed-off-by: Garima Singh <garima.singh@microsoft.com>
---
 quote.c          | 9 +++++++++
 t/t0014-alias.sh | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/quote.c b/quote.c
index 7f2aa6faa4..26f1848dde 100644
--- a/quote.c
+++ b/quote.c
@@ -48,6 +48,15 @@ void sq_quote_buf_pretty(struct strbuf *dst, const char *src)
 	static const char ok_punct[] = "+,-./:=@_^";
 	const char *p;
 
+	if (!src) 
+		BUG("Cannot append a NULL token to the buffer");
+	
+	/* Avoid losing a zero-length string by adding '' */ 
+	if (!*src) {
+		strbuf_addstr(dst, "''");
+		return;
+	}
+
 	for (p = src; *p; p++) {
 		if (!isalpha(*p) && !isdigit(*p) && !strchr(ok_punct, *p)) {
 			sq_quote_buf(dst, src);
diff --git a/t/t0014-alias.sh b/t/t0014-alias.sh
index a070e645d7..2694c81afd 100755
--- a/t/t0014-alias.sh
+++ b/t/t0014-alias.sh
@@ -37,4 +37,11 @@ test_expect_success 'looping aliases - internal execution' '
 #	test_i18ngrep "^fatal: alias loop detected: expansion of" output
 #'
 
+test_expect_success 'run-command formats empty args properly' '
+    GIT_TRACE=1 git frotz a "" b " " c 2>&1 |
+    sed -ne "/run_command:/s/.*trace: run_command: //p" >actual &&
+    echo "git-frotz a '\'''\'' b '\'' '\'' c" >expect &&
+    test_cmp expect actual
+'
+
 test_done
-- 
gitgitgadget

  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-20 19:35 [PATCH 0/1] quote: handle null and empty strings in sq_quote_buf_pretty() Garima Singh via GitGitGadget
2019-08-20 19:35 ` [PATCH 1/1] " Garima Singh via GitGitGadget
2019-08-20 20:29   ` Junio C Hamano
2019-08-21 15:22     ` Junio C Hamano
2019-08-20 20:32   ` Junio C Hamano
2019-08-26 14:44 ` [PATCH v2 0/1] " Garima Singh via GitGitGadget
2019-08-26 14:44   ` [PATCH v2 1/1] " Garima Singh via GitGitGadget
2019-08-26 15:24     ` Garima Singh
2019-08-26 16:20       ` Junio C Hamano
2019-10-07 16:17   ` [PATCH v3 0/1] " Garima Singh via GitGitGadget
2019-10-07 16:17     ` [PATCH v3 1/1] quote: handle numm and empty strings in sq_quote_buf_pretty Garima Singh via GitGitGadget
2019-10-07 17:08       ` Garima Singh
2019-10-07 17:27       ` Eric Sunshine
2019-10-07 17:47         ` Garima Singh
2019-10-07 19:38     ` [PATCH v4 0/1] quote: handle null and empty strings in sq_quote_buf_pretty() Garima Singh via GitGitGadget
2019-10-07 19:38       ` Garima Singh via GitGitGadget [this message]
2019-10-08  3:16         ` [PATCH v4 1/1] sq_quote_buf_pretty: don't drop empty arguments Junio C Hamano
2019-10-08 16:40       ` [PATCH v5 0/1] quote: handle null and empty strings in sq_quote_buf_pretty() Garima Singh via GitGitGadget
2019-10-08 16:40         ` [PATCH v5 1/1] sq_quote_buf_pretty: don't drop empty arguments Garima Singh via GitGitGadget

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