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[v3,2/2] Explicitly `fflush` stdout before expecting interactive input

Message ID 063d2aaa4016bd6d98d2ce6695e24865e93b0ed3.1586542614.git.gitgitgadget@gmail.com (mailing list archive)
State New, archived
Headers show
Series Explicitly fflush stdout in git clean | expand

Commit Message

John Passaro via GitGitGadget April 10, 2020, 6:16 p.m. UTC 
From: =?UTF-8?q?=EB=A7=88=EB=88=84=EC=97=98?= <nalla@hamal.uberspace.de>

At least one interactive command writes a prompt to `stdout` and then
reads user input on `stdin`: `git clean --interactive`. If the prompt is
left in the buffer, the user will not realize the program is waiting for
their input.

So let's just flush `stdout` before reading the user's input.

Signed-off-by: 마누엘 <nalla@hamal.uberspace.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 prompt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/prompt.c b/prompt.c
index 098dcfb7cf9..5ded21a017f 100644
--- a/prompt.c
+++ b/prompt.c
@@ -77,8 +77,10 @@  char *git_prompt(const char *prompt, int flags)
 
 int git_read_line_interactively(struct strbuf *line)
 {
-	int ret = strbuf_getline_lf(line, stdin);
+	int ret;
 
+	fflush(stdout);
+	ret = strbuf_getline_lf(line, stdin);
 	if (ret != EOF)
 		strbuf_trim_trailing_newline(line);