[PATCH 01/10] bisect--helper: introduce new `write_in_file()` function

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Let's refactor code adding a new `write_in_file()` function
that opens a file for writing a message and closes it.

This removes some duplicated code and makes the code simpler,
clearer and easier to understand.

Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Mentored-by: Johannes Schindelin <Johannes.Schindelin@xxxxxx>
Signed-off-by: Miriam Rubio <mirucam@xxxxxxxxx>
---
 builtin/bisect--helper.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index c1c40b516d..ee1be630da 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -74,6 +74,19 @@ static int one_of(const char *term, ...)
 	return res;
 }
 
+static int write_in_file(const char *filepath, const char *content, int append)
+{
+	FILE *fp = NULL;
+	const char *mode = append ? "a" : "w";
+
+	fp = fopen(filepath, mode);
+	if (!fp)
+		return error_errno(_("could not open the file '%s'"), filepath);
+	if (!fprintf(fp, "%s\n", content))
+		return error_errno(_("could not write in file '%s'"), filepath);
+	return fclose(fp);
+}
+
 static int check_term_format(const char *term, const char *orig_term)
 {
 	int res;
@@ -104,7 +117,7 @@ static int check_term_format(const char *term, const char *orig_term)
 
 static int write_terms(const char *bad, const char *good)
 {
-	FILE *fp = NULL;
+	char *content = xstrfmt("%s\n%s", bad, good);
 	int res;
 
 	if (!strcmp(bad, good))
@@ -113,12 +126,9 @@ static int write_terms(const char *bad, const char *good)
 	if (check_term_format(bad, "bad") || check_term_format(good, "good"))
 		return -1;
 
-	fp = fopen(git_path_bisect_terms(), "w");
-	if (!fp)
-		return error_errno(_("could not open the file BISECT_TERMS"));
+	res = write_in_file(git_path_bisect_terms(), content, 0);
+	free(content);
 
-	res = fprintf(fp, "%s\n%s\n", bad, good);
-	res |= fclose(fp);
 	return (res < 0) ? -1 : 0;
 }
 
-- 
2.25.0




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