From 929b0ff087ff70c9deadb65fb1c54af91b814d9f Mon Sep 17 00:00:00 2001
From: Ori Bernstein <ori@eigenstate.org>
Date: Sun, 17 Apr 2022 17:03:47 +0000
Subject: git: rename internal 'git/fetch' plumbing to 'git/get'

This caused some confusion, so to make it clear that
it's plumbing and has nothing to do with 'git fetch',
rename it.
---
 sys/src/cmd/git/fetch.c | 372 ------------------------------------------------
 1 file changed, 372 deletions(-)
 delete mode 100644 sys/src/cmd/git/fetch.c

(limited to 'sys/src/cmd/git/fetch.c')

diff --git a/sys/src/cmd/git/fetch.c b/sys/src/cmd/git/fetch.c
deleted file mode 100644
index 95dfe106e..000000000
--- a/sys/src/cmd/git/fetch.c
+++ /dev/null
@@ -1,372 +0,0 @@
-#include <u.h>
-#include <libc.h>
-
-#include "git.h"
-
-char *fetchbranch;
-char *upstream = "origin";
-int listonly;
-
-int
-resolveremote(Hash *h, char *ref)
-{
-	char buf[128], *s;
-	int r, f;
-
-	ref = strip(ref);
-	if((r = hparse(h, ref)) != -1)
-		return r;
-	/* Slightly special handling: translate remote refs to local ones. */
-	if(strcmp(ref, "HEAD") == 0){
-		snprint(buf, sizeof(buf), ".git/HEAD");
-	}else if(strstr(ref, "refs/heads") == ref){
-		ref += strlen("refs/heads");
-		snprint(buf, sizeof(buf), ".git/refs/remotes/%s/%s", upstream, ref);
-	}else if(strstr(ref, "refs/tags") == ref){
-		ref += strlen("refs/tags");
-		snprint(buf, sizeof(buf), ".git/refs/tags/%s/%s", upstream, ref);
-	}else{
-		return -1;
-	}
-
-	r = -1;
-	s = strip(buf);
-	if((f = open(s, OREAD)) == -1)
-		return -1;
-	if(readn(f, buf, sizeof(buf)) >= 40)
-		r = hparse(h, buf);
-	close(f);
-
-	if(r == -1 && strstr(buf, "ref:") == buf)
-		return resolveremote(h, buf + strlen("ref:"));
-	return r;
-}
-
-int
-rename(char *pack, char *idx, Hash h)
-{
-	char name[128];
-	Dir st;
-
-	nulldir(&st);
-	st.name = name;
-	snprint(name, sizeof(name), "%H.pack", h);
-	if(access(name, AEXIST) == 0)
-		fprint(2, "warning, pack %s already fetched\n", name);
-	else if(dirwstat(pack, &st) == -1)
-		return -1;
-	snprint(name, sizeof(name), "%H.idx", h);
-	if(access(name, AEXIST) == 0)
-		fprint(2, "warning, pack %s already indexed\n", name);
-	else if(dirwstat(idx, &st) == -1)
-		return -1;
-	return 0;
-}
-
-int
-checkhash(int fd, vlong sz, Hash *hcomp)
-{
-	DigestState *st;
-	Hash hexpect;
-	char buf[Pktmax];
-	vlong n, r;
-	int nr;
-	
-	if(sz < 28){
-		werrstr("undersize packfile");
-		return -1;
-	}
-
-	st = nil;
-	n = 0;
-	while(n != sz - 20){
-		nr = sizeof(buf);
-		if(sz - n - 20 < sizeof(buf))
-			nr = sz - n - 20;
-		r = readn(fd, buf, nr);
-		if(r != nr)
-			return -1;
-		st = sha1((uchar*)buf, nr, nil, st);
-		n += r;
-	}
-	sha1(nil, 0, hcomp->h, st);
-	if(readn(fd, hexpect.h, sizeof(hexpect.h)) != sizeof(hexpect.h))
-		sysfatal("truncated packfile");
-	if(!hasheq(hcomp, &hexpect)){
-		werrstr("bad hash: %H != %H", *hcomp, hexpect);
-		return -1;
-	}
-	return 0;
-}
-
-int
-mkoutpath(char *path)
-{
-	char s[128];
-	char *p;
-	int fd;
-
-	snprint(s, sizeof(s), "%s", path);
-	for(p=strchr(s+1, '/'); p; p=strchr(p+1, '/')){
-		*p = 0;
-		if(access(s, AEXIST) != 0){
-			fd = create(s, OREAD, DMDIR | 0775);
-			if(fd == -1)
-				return -1;
-			close(fd);
-		}		
-		*p = '/';
-	}
-	return 0;
-}
-
-int
-branchmatch(char *br, char *pat)
-{
-	char name[128];
-
-	if(strstr(pat, "refs/heads") == pat)
-		snprint(name, sizeof(name), "%s", pat);
-	else if(strstr(pat, "heads"))
-		snprint(name, sizeof(name), "refs/%s", pat);
-	else
-		snprint(name, sizeof(name), "refs/heads/%s", 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, ...)
-{
-	char buf[ERRMAX];
-	va_list ap;
-
-	va_start(ap, msg);
-	snprint(buf, sizeof(buf), msg, ap);
-	va_end(ap);
-
-	remove(pack);
-	remove(idx);
-	fprint(2, "%s", buf);
-	exits(buf);
-}
-
-int
-fetchpack(Conn *c)
-{
-	char buf[Pktmax], *sp[3], *ep;
-	char *packtmp, *idxtmp, **ref;
-	Hash h, *have, *want;
-	int nref, refsz, first;
-	int i, n, l, req, pfd;
-	vlong packsz;
-	Objset hadobj;
-	Object *o;
-
-	nref = 0;
-	refsz = 16;
-	first = 1;
-	have = eamalloc(refsz, sizeof(have[0]));
-	want = eamalloc(refsz, sizeof(want[0]));
-	ref = eamalloc(refsz, sizeof(ref[0]));
-	while(1){
-		n = readpkt(c, buf, sizeof(buf));
-		if(n == -1)
-			return -1;
-		if(n == 0)
-			break;
-		if(strncmp(buf, "ERR ", 4) == 0)
-			sysfatal("%s", buf + 4);
-
-		if(first && n > strlen(buf))
-			handlecaps(buf + strlen(buf) + 1);
-		first = 0;
-
-		getfields(buf, sp, nelem(sp), 1, " \t\n\r");
-		if(strstr(sp[1], "^{}"))
-			continue;
-		if(fetchbranch && !branchmatch(sp[1], fetchbranch))
-			continue;
-		if(refsz == nref + 1){
-			refsz *= 2;
-			have = earealloc(have, refsz, sizeof(have[0]));
-			want = earealloc(want, refsz, sizeof(want[0]));
-			ref = earealloc(ref, refsz, sizeof(ref[0]));
-		}
-		if(hparse(&want[nref], sp[0]) == -1)
-			sysfatal("invalid hash %s", sp[0]);
-		if (resolveremote(&have[nref], sp[1]) == -1)
-			memset(&have[nref], 0, sizeof(have[nref]));
-		ref[nref] = estrdup(sp[1]);
-		nref++;
-	}
-	if(listonly){
-		flushpkt(c);
-		goto showrefs;
-	}
-
-	if(writephase(c) == -1)
-		sysfatal("write: %r");
-	req = 0;
-	for(i = 0; i < nref; i++){
-		if(hasheq(&have[i], &want[i]))
-			continue;
-		if((o = readobject(want[i])) != nil){
-			unref(o);
-			continue;
-		}
-		n = snprint(buf, sizeof(buf), "want %H\n", want[i]);
-		if(writepkt(c, buf, n) == -1)
-			sysfatal("could not send want for %H", want[i]);
-		req = 1;
-	}
-	flushpkt(c);
-	osinit(&hadobj);
-	for(i = 0; i < nref; i++){
-		if(hasheq(&have[i], &Zhash) || oshas(&hadobj, have[i]))
-			continue;
-		if((o = readobject(have[i])) == nil)
-			sysfatal("missing object we should have: %H", have[i]);
-		osadd(&hadobj, o);
-		unref(o);	
-		n = snprint(buf, sizeof(buf), "have %H\n", have[i]);
-		if(writepkt(c, buf, n + 1) == -1)
-			sysfatal("could not send have for %H", have[i]);
-	}
-	osclear(&hadobj);
-	if(!req)
-		flushpkt(c);
-
-	n = snprint(buf, sizeof(buf), "done\n");
-	if(writepkt(c, buf, n) == -1)
-		sysfatal("write: %r");
-	if(!req)
-		goto showrefs;
-	if(readphase(c) == -1)
-		sysfatal("read: %r");
-	if((n = readpkt(c, buf, sizeof(buf))) == -1)
-		sysfatal("read: %r");
-	buf[n] = 0;
-
-	if((packtmp = smprint(".git/objects/pack/fetch.%d.pack", getpid())) == nil)
-		sysfatal("smprint: %r");
-	if((idxtmp = smprint(".git/objects/pack/fetch.%d.idx", getpid())) == nil)
-		sysfatal("smprint: %r");
-	if(mkoutpath(packtmp) == -1)
-		sysfatal("could not create %s: %r", packtmp);
-	if((pfd = create(packtmp, ORDWR, 0664)) == -1)
-		sysfatal("could not create %s: %r", packtmp);
-
-	fprint(2, "fetching...\n");
-	/*
-	 * Work around torvalds git bug: we get duplicate have lines
-	 * somtimes, even though the protocol is supposed to start the
-	 * pack file immediately.
-	 *
-	 * Skip ahead until we read 'PACK' off the wire
-	 */
-	while(1){
-		if(readn(c->rfd, buf, 4) != 4)
-			sysfatal("fetch packfile: short read");
-		buf[4] = 0;
-		if(strncmp(buf, "PACK", 4) == 0)
-			break;
-		l = strtol(buf, &ep, 16);
-		if(l == 0 || ep != buf + 4)
-			sysfatal("fetch packfile: junk pktline");
-		if(readn(c->rfd, buf, l) != l)
-			sysfatal("fetch packfile: short read");
-	}
-	if(write(pfd, "PACK", 4) != 4)
-		sysfatal("write pack header: %r");
-	packsz = 4;
-	while(1){
-		n = read(c->rfd, buf, sizeof buf);
-		if(n == 0)
-			break;
-		if(n == -1 || write(pfd, buf, n) != n)
-			sysfatal("fetch packfile: %r");
-		packsz += n;
-	}
-
-	closeconn(c);
-	if(seek(pfd, 0, 0) == -1)
-		fail(packtmp, idxtmp, "packfile seek: %r");
-	if(checkhash(pfd, packsz, &h) == -1)
-		fail(packtmp, idxtmp, "corrupt packfile: %r");
-	close(pfd);
-	if(indexpack(packtmp, idxtmp, h) == -1)
-		fail(packtmp, idxtmp, "could not index fetched pack: %r");
-	if(rename(packtmp, idxtmp, h) == -1)
-		fail(packtmp, idxtmp, "could not rename indexed pack: %r");
-
-showrefs:
-	for(i = 0; i < nref; i++){
-		print("remote %s %H local %H\n", ref[i], want[i], have[i]);
-		free(ref[i]);
-	}
-	free(ref);
-	free(want);
-	free(have);
-	return 0;
-}
-
-void
-usage(void)
-{
-	fprint(2, "usage: %s [-dl] [-b br] [-u upstream] remote\n", argv0);
-	fprint(2, "\t-b br:	only fetch matching branch 'br'\n");
-	fprint(2, "remote:	fetch from this repository\n");
-	exits("usage");
-}
-
-void
-main(int argc, char **argv)
-{
-	Conn c;
-
-	ARGBEGIN{
-	case 'b':	fetchbranch=EARGF(usage());	break;
-	case 'u':	upstream=EARGF(usage());	break;
-	case 'd':	chattygit++;			break;
-	case 'l':	listonly++;			break;
-	default:	usage();			break;
-	}ARGEND;
-
-	gitinit();
-	if(argc != 1)
-		usage();
-
-	if(gitconnect(&c, argv[0], "upload") == -1)
-		sysfatal("could not dial %s: %r", argv[0]);
-	if(fetchpack(&c) == -1)
-		sysfatal("fetch failed: %r");
-	closeconn(&c);
-	exits(nil);
-}
-- 
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