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update-ref --stdin: narrow scope of err strbuf

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Making the strbuf local in each function that needs to print errors
saves the reader from having to think about action at a distance,
such as

 * errors piling up and being concatenated with no newline between
   them
 * errors unhandled in one function, to be later handled in another
 * concurrency issues, if this code starts using threads some day

No functional change intended.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2014-09-02 14:10:52 -07:00 committed by Junio C Hamano
parent 7521cc4611
commit ab5ac95725
1 changed files with 10 additions and 1 deletions
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11
builtin/update-ref.c
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@ -16,7 +16,6 @@ static struct ref_transaction *transaction;
static char line_termination = '\n';
static int update_flags;
static struct strbuf err = STRBUF_INIT;
/*
* Parse one whitespace- or NUL-terminated, possibly C-quoted argument
@ -179,6 +178,7 @@ static int parse_next_sha1(struct strbuf *input, const char **next,
static const char *parse_cmd_update(struct strbuf *input, const char *next)
{
struct strbuf err = STRBUF_INIT;
char *refname;
unsigned char new_sha1[20];
unsigned char old_sha1[20];
@ -204,12 +204,14 @@ static const char *parse_cmd_update(struct strbuf *input, const char *next)
update_flags = 0;
free(refname);
strbuf_release(&err);
return next;
}
static const char *parse_cmd_create(struct strbuf *input, const char *next)
{
struct strbuf err = STRBUF_INIT;
char *refname;
unsigned char new_sha1[20];
@ -232,12 +234,14 @@ static const char *parse_cmd_create(struct strbuf *input, const char *next)
update_flags = 0;
free(refname);
strbuf_release(&err);
return next;
}
static const char *parse_cmd_delete(struct strbuf *input, const char *next)
{
struct strbuf err = STRBUF_INIT;
char *refname;
unsigned char old_sha1[20];
int have_old;
@ -264,12 +268,14 @@ static const char *parse_cmd_delete(struct strbuf *input, const char *next)
update_flags = 0;
free(refname);
strbuf_release(&err);
return next;
}
static const char *parse_cmd_verify(struct strbuf *input, const char *next)
{
struct strbuf err = STRBUF_INIT;
char *refname;
unsigned char new_sha1[20];
unsigned char old_sha1[20];
@ -297,6 +303,7 @@ static const char *parse_cmd_verify(struct strbuf *input, const char *next)
update_flags = 0;
free(refname);
strbuf_release(&err);
return next;
}
@ -365,6 +372,8 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
die("Refusing to perform update with empty message.");
if (read_stdin) {
struct strbuf err = STRBUF_INIT;
transaction = ref_transaction_begin(&err);
if (!transaction)
die("%s", err.buf);