git: refactor capability parsing

this should be a nop, but set us up better
for handling and exposing capabilities in
git/serve.

sys/src/cmd/git/get.c

@@ -134,33 +134,6 @@ branchmatch(char *br, char *pat)
 	return strcmp(br, name) == 0;
 }
 
-char *
-matchcap(char *s, char *cap, int full)
-{
-	if(strncmp(s, cap, strlen(cap)) == 0)
-		if(!full || strlen(s) == strlen(cap))
-			return s + strlen(cap);
-	return nil;
-}
-
-void
-handlecaps(char *caps)
-{
-	char *p, *n, *c, *r;
-
-	for(p = caps; p != nil; p = n){
-		n = strchr(p, ' ');
-		if(n != nil)
-			*n++ = 0;
-		if((c = matchcap(p, "symref=", 0)) != nil){
-			if((r = strchr(c, ':')) != nil){
-				*r++ = '\0';
-				print("symref %s %s\n", c, r);
-			}
-		}
-	}
-}
-
 void
 fail(char *pack, char *idx, char *msg, ...)
 {
@@ -202,6 +175,7 @@ fetchpack(Conn *c)
 	int nref, refsz, first, nsent;
 	int i, l, n, req, pfd;
 	vlong packsz;
+	Capset cs;
 	Objset hadobj;
 	Object *o;
 	Objq haveq;
@@ -220,8 +194,11 @@ fetchpack(Conn *c)
 		if(n == 0)
 			break;
 
-		if(first && n > strlen(buf))
+		if(first && n > strlen(buf)){
-			handlecaps(buf + strlen(buf) + 1);
+			parsecaps(buf + strlen(buf) + 1, &cs);
+			if(cs.symfrom[0] != 0)
+				print("symref %s %s\n", cs.symfrom, cs.symto);
+		}
 		first = 0;
 
 		getfields(buf, sp, nelem(sp), 1, " \t\n\r");

sys/src/cmd/git/git.h

@@ -82,6 +82,14 @@ struct Hash {
 	uchar h[20];
 };
 
+struct Capset {
+	char	symfrom[256];
+	char	symto[256];
+	int	sideband;
+	int	sideband64k;
+	int	report;
+};
+
 struct Conn {
 	int type;
 	int rfd;
@@ -330,6 +338,7 @@ int	gitconnect(Conn *, char *, char *);
 int	readphase(Conn *);
 int	writephase(Conn *);
 void	closeconn(Conn *);
+void	parsecaps(char *, Capset *);
 
 /* queues */
 void	qinit(Objq*);

sys/src/cmd/git/proto.c

@@ -17,6 +17,42 @@ enum {
 	Nbranch	= 32,
 };
 
+char *
+matchcap(char *s, char *cap, int full)
+{
+	if(strncmp(s, cap, strlen(cap)) == 0)
+		if(!full || strlen(s) == strlen(cap))
+			return s + strlen(cap);
+	return nil;
+}
+
+void
+parsecaps(char *caps, Capset *cs)
+{
+	char *p, *n, *c, *t;
+
+	memset(cs, 0, sizeof(*cs));
+	for(p = caps; p != nil; p = n){
+		n = strchr(p, ' ');
+		if(n != nil)
+			*n++ = 0;
+		if(matchcap(p, "report-status", 1) != nil)
+			cs->report = 1;
+		else if(matchcap(p, "side-band", 1) != nil)
+			cs->sideband = 1;
+		else if(matchcap(p, "side-band-64k", 1) != nil)
+			cs->sideband64k = 1;
+		else if((c = matchcap(p, "symref=", 0)) != nil){
+			if((t = strchr(c, ':')) == nil)
+				continue;
+			*t++ = '\0';
+			snprint(cs->symfrom, sizeof(cs->symfrom), c);
+			snprint(cs->symto, sizeof(cs->symto), t);
+		}
+	}
+}
+
+
 void
 tracepkt(int v, char *pfx, char *b, int n)
 {
@@ -158,7 +194,7 @@ parseuri(char *uri, char *proto, char *host, char *port, char *path, char *repo)
 		snprint(port, Nport, "80");
 	else if(strncmp(proto, "hjgit", 5) == 0)
 		snprint(port, Nport, "17021");
-	else if(strncmp(proto, "gits", 4) == 0)
+	else if(strncmp(proto, "gits", 5) == 0)
 		snprint(port, Nport, "9419");
 	else
 		hasport = 0;

sys/src/cmd/git/send.c

@@ -3,15 +3,8 @@
 
 #include "git.h"
 
-typedef struct Capset	Capset;
 typedef struct Map	Map;
 
-struct Capset {
-	int	sideband;
-	int	sideband64k;
-	int	report;
-};
-
 struct Map {
 	char	*ref;
 	Hash	ours;
@@ -89,33 +82,6 @@ readours(Hash **tailp, char ***refp)
 	return nu;	
 }
 
-char *
-matchcap(char *s, char *cap, int full)
-{
-	if(strncmp(s, cap, strlen(cap)) == 0)
-		if(!full || strlen(s) == strlen(cap))
-			return s + strlen(cap);
-	return nil;
-}
-
-void
-parsecaps(char *caps, Capset *cs)
-{
-	char *p, *n;
-
-	for(p = caps; p != nil; p = n){
-		n = strchr(p, ' ');
-		if(n != nil)
-			*n++ = 0;
-		if(matchcap(p, "report-status", 1) != nil)
-			cs->report = 1;
-		if(matchcap(p, "side-band", 1) != nil)
-			cs->sideband = 1;
-		if(matchcap(p, "side-band-64k", 1) != nil)
-			cs->sideband64k = 1;
-	}
-}
-
 int
 sendpack(Conn *c)
 {