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git-fetch: rewrite another shell loop in C

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Move another shell loop that canonicalizes the list of refs for
underlying git-fetch-pack and fetch-native-store into C.

This seems to shave the runtime for the same 1000 branch
repository from 30 seconds down to 15 seconds (it used to be 2
and half minutes with the original version).

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2007-01-16 02:31:36 -08:00
parent fbe2687eba
commit d1e0ef6cc8
2 changed files with 48 additions and 28 deletions
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46
builtin-fetch--tool.c
View file

@ -283,6 +283,46 @@ static int fetch_native_store(FILE *fp,
return err;
}
static int parse_reflist(const char *reflist)
{
const char *ref;
printf("refs='");
for (ref = reflist; ref; ) {
const char *next;
while (*ref && isspace(*ref))
ref++;
if (!*ref)
break;
for (next = ref; *next && !isspace(*next); next++)
;
printf("\n%.*s", (int)(next - ref), ref);
ref = next;
}
printf("'\n");
printf("rref='");
for (ref = reflist; ref; ) {
const char *next, *colon;
while (*ref && isspace(*ref))
ref++;
if (!*ref)
break;
for (next = ref; *next && !isspace(*next); next++)
;
if (*ref == '.')
ref++;
if (*ref == '+')
ref++;
colon = strchr(ref, ':');
putchar('\n');
printf("%.*s", (int)((colon ? colon : next) - ref), ref);
ref = next;
}
printf("'\n");
return 0;
}
int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
{
int verbose = 0;
@ -335,5 +375,11 @@ int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
fclose(fp);
return result;
}
if (!strcmp("parse-reflist", argv[1])) {
if (argc != 3)
return error("parse-reflist takes 1 arg");
return parse_reflist(argv[2]);
}
return error("Unknown subcommand: %s", argv[1]);
}

30
git-fetch.sh
View file

@ -155,35 +155,9 @@ then
fi
fetch_native () {
reflist="$1"
refs=
rref=
for ref in $reflist
do
refs="$refs$LF$ref"
# These are relative path from $GIT_DIR, typically starting at refs/
# but may be HEAD
if expr "z$ref" : 'z\.' >/dev/null
then
not_for_merge=t
ref=$(expr "z$ref" : 'z\.\(.*\)')
else
not_for_merge=
fi
if expr "z$ref" : 'z+' >/dev/null
then
single_force=t
ref=$(expr "z$ref" : 'z+\(.*\)')
else
single_force=
fi
remote_name=$(expr "z$ref" : 'z\([^:]*\):')
local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
rref="$rref$LF$remote_name"
done
eval=$(git-fetch--tool parse-reflist "$1")
eval "$eval"
( : subshell because we muck with IFS
IFS=" $LF"