chore(3p/git): Unvendor git and track patches instead r/2903

This was vendored a long time ago under the expectation that keeping
it in sync with cgit would be easier this way, but it has proven not
to be a big issue.

On the other hand, a vendored copy of git is an annoying maintenance
burden. It is much easier to rebase the single (dottime) patch that we
have.

This removes the vendored copy of git and instead passes the git
source code to cgit via `pkgs.srcOnly`, which includes the applied
patch so that cgit can continue rendering dottime.

Change-Id: If31f62dea7ce688fd1b9050204e9378019775f2b

1 files changed, 0 insertions, 329 deletions

diff --git a/third_party/git/xdiff/xemit.c b/third_party/git/xdiff/xemit.c
deleted file mode 100644
index 9d7d6c5087..0000000000
--- a/third_party/git/xdiff/xemit.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- *  LibXDiff by Davide Libenzi ( File Differential Library )
- *  Copyright (C) 2003	Davide Libenzi
- *
- *  This library is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU Lesser General Public
- *  License as published by the Free Software Foundation; either
- *  version 2.1 of the License, or (at your option) any later version.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  Lesser General Public License for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public
- *  License along with this library; if not, see
- *  <http://www.gnu.org/licenses/>.
- *
- *  Davide Libenzi <davidel@xmailserver.org>
- *
- */
-
-#include "xinclude.h"
-
-static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec) {
-
-	*rec = xdf->recs[ri]->ptr;
-
-	return xdf->recs[ri]->size;
-}
-
-
-static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb) {
-	long size, psize = strlen(pre);
-	char const *rec;
-
-	size = xdl_get_rec(xdf, ri, &rec);
-	if (xdl_emit_diffrec(rec, size, pre, psize, ecb) < 0) {
-
-		return -1;
-	}
-
-	return 0;
-}
-
-
-/*
- * Starting at the passed change atom, find the latest change atom to be included
- * inside the differential hunk according to the specified configuration.
- * Also advance xscr if the first changes must be discarded.
- */
-xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg)
-{
-	xdchange_t *xch, *xchp, *lxch;
-	long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
-	long max_ignorable = xecfg->ctxlen;
-	unsigned long ignored = 0; /* number of ignored blank lines */
-
-	/* remove ignorable changes that are too far before other changes */
-	for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) {
-		xch = xchp->next;
-
-		if (xch == NULL ||
-		    xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable)
-			*xscr = xch;
-	}
-
-	if (*xscr == NULL)
-		return NULL;
-
-	lxch = *xscr;
-
-	for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) {
-		long distance = xch->i1 - (xchp->i1 + xchp->chg1);
-		if (distance > max_common)
-			break;
-
-		if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) {
-			lxch = xch;
-			ignored = 0;
-		} else if (distance < max_ignorable && xch->ignore) {
-			ignored += xch->chg2;
-		} else if (lxch != xchp &&
-			   xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) {
-			break;
-		} else if (!xch->ignore) {
-			lxch = xch;
-			ignored = 0;
-		} else {
-			ignored += xch->chg2;
-		}
-	}
-
-	return lxch;
-}
-
-
-static long def_ff(const char *rec, long len, char *buf, long sz, void *priv)
-{
-	if (len > 0 &&
-			(isalpha((unsigned char)*rec) || /* identifier? */
-			 *rec == '_' || /* also identifier? */
-			 *rec == '$')) { /* identifiers from VMS and other esoterico */
-		if (len > sz)
-			len = sz;
-		while (0 < len && isspace((unsigned char)rec[len - 1]))
-			len--;
-		memcpy(buf, rec, len);
-		return len;
-	}
-	return -1;
-}
-
-static long match_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri,
-			   char *buf, long sz)
-{
-	const char *rec;
-	long len = xdl_get_rec(xdf, ri, &rec);
-	if (!xecfg->find_func)
-		return def_ff(rec, len, buf, sz, xecfg->find_func_priv);
-	return xecfg->find_func(rec, len, buf, sz, xecfg->find_func_priv);
-}
-
-static int is_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri)
-{
-	char dummy[1];
-	return match_func_rec(xdf, xecfg, ri, dummy, sizeof(dummy)) >= 0;
-}
-
-struct func_line {
-	long len;
-	char buf[80];
-};
-
-static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg,
-			  struct func_line *func_line, long start, long limit)
-{
-	long l, size, step = (start > limit) ? -1 : 1;
-	char *buf, dummy[1];
-
-	buf = func_line ? func_line->buf : dummy;
-	size = func_line ? sizeof(func_line->buf) : sizeof(dummy);
-
-	for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) {
-		long len = match_func_rec(&xe->xdf1, xecfg, l, buf, size);
-		if (len >= 0) {
-			if (func_line)
-				func_line->len = len;
-			return l;
-		}
-	}
-	return -1;
-}
-
-static int is_empty_rec(xdfile_t *xdf, long ri)
-{
-	const char *rec;
-	long len = xdl_get_rec(xdf, ri, &rec);
-
-	while (len > 0 && XDL_ISSPACE(*rec)) {
-		rec++;
-		len--;
-	}
-	return !len;
-}
-
-int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
-		  xdemitconf_t const *xecfg) {
-	long s1, s2, e1, e2, lctx;
-	xdchange_t *xch, *xche;
-	long funclineprev = -1;
-	struct func_line func_line = { 0 };
-
-	for (xch = xscr; xch; xch = xche->next) {
-		xdchange_t *xchp = xch;
-		xche = xdl_get_hunk(&xch, xecfg);
-		if (!xch)
-			break;
-
-pre_context_calculation:
-		s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0);
-		s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0);
-
-		if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
-			long fs1, i1 = xch->i1;
-
-			/* Appended chunk? */
-			if (i1 >= xe->xdf1.nrec) {
-				long i2 = xch->i2;
-
-				/*
-				 * We don't need additional context if
-				 * a whole function was added.
-				 */
-				while (i2 < xe->xdf2.nrec) {
-					if (is_func_rec(&xe->xdf2, xecfg, i2))
-						goto post_context_calculation;
-					i2++;
-				}
-
-				/*
-				 * Otherwise get more context from the
-				 * pre-image.
-				 */
-				i1 = xe->xdf1.nrec - 1;
-			}
-
-			fs1 = get_func_line(xe, xecfg, NULL, i1, -1);
-			while (fs1 > 0 && !is_empty_rec(&xe->xdf1, fs1 - 1) &&
-			       !is_func_rec(&xe->xdf1, xecfg, fs1 - 1))
-				fs1--;
-			if (fs1 < 0)
-				fs1 = 0;
-			if (fs1 < s1) {
-				s2 = XDL_MAX(s2 - (s1 - fs1), 0);
-				s1 = fs1;
-
-				/*
-				 * Did we extend context upwards into an
-				 * ignored change?
-				 */
-				while (xchp != xch &&
-				       xchp->i1 + xchp->chg1 <= s1 &&
-				       xchp->i2 + xchp->chg2 <= s2)
-					xchp = xchp->next;
-
-				/* If so, show it after all. */
-				if (xchp != xch) {
-					xch = xchp;
-					goto pre_context_calculation;
-				}
-			}
-		}
-
- post_context_calculation:
-		lctx = xecfg->ctxlen;
-		lctx = XDL_MIN(lctx, xe->xdf1.nrec - (xche->i1 + xche->chg1));
-		lctx = XDL_MIN(lctx, xe->xdf2.nrec - (xche->i2 + xche->chg2));
-
-		e1 = xche->i1 + xche->chg1 + lctx;
-		e2 = xche->i2 + xche->chg2 + lctx;
-
-		if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
-			long fe1 = get_func_line(xe, xecfg, NULL,
-						 xche->i1 + xche->chg1,
-						 xe->xdf1.nrec);
-			while (fe1 > 0 && is_empty_rec(&xe->xdf1, fe1 - 1))
-				fe1--;
-			if (fe1 < 0)
-				fe1 = xe->xdf1.nrec;
-			if (fe1 > e1) {
-				e2 = XDL_MIN(e2 + (fe1 - e1), xe->xdf2.nrec);
-				e1 = fe1;
-			}
-
-			/*
-			 * Overlap with next change?  Then include it
-			 * in the current hunk and start over to find
-			 * its new end.
-			 */
-			if (xche->next) {
-				long l = XDL_MIN(xche->next->i1,
-						 xe->xdf1.nrec - 1);
-				if (l - xecfg->ctxlen <= e1 ||
-				    get_func_line(xe, xecfg, NULL, l, e1) < 0) {
-					xche = xche->next;
-					goto post_context_calculation;
-				}
-			}
-		}
-
-		/*
-		 * Emit current hunk header.
-		 */
-
-		if (xecfg->flags & XDL_EMIT_FUNCNAMES) {
-			get_func_line(xe, xecfg, &func_line,
-				      s1 - 1, funclineprev);
-			funclineprev = s1 - 1;
-		}
-		if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
-				      func_line.buf, func_line.len, ecb) < 0)
-			return -1;
-
-		/*
-		 * Emit pre-context.
-		 */
-		for (; s2 < xch->i2; s2++)
-			if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-				return -1;
-
-		for (s1 = xch->i1, s2 = xch->i2;; xch = xch->next) {
-			/*
-			 * Merge previous with current change atom.
-			 */
-			for (; s1 < xch->i1 && s2 < xch->i2; s1++, s2++)
-				if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-					return -1;
-
-			/*
-			 * Removes lines from the first file.
-			 */
-			for (s1 = xch->i1; s1 < xch->i1 + xch->chg1; s1++)
-				if (xdl_emit_record(&xe->xdf1, s1, "-", ecb) < 0)
-					return -1;
-
-			/*
-			 * Adds lines from the second file.
-			 */
-			for (s2 = xch->i2; s2 < xch->i2 + xch->chg2; s2++)
-				if (xdl_emit_record(&xe->xdf2, s2, "+", ecb) < 0)
-					return -1;
-
-			if (xch == xche)
-				break;
-			s1 = xch->i1 + xch->chg1;
-			s2 = xch->i2 + xch->chg2;
-		}
-
-		/*
-		 * Emit post-context.
-		 */
-		for (s2 = xche->i2 + xche->chg2; s2 < e2; s2++)
-			if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-				return -1;
-	}
-
-	return 0;
-}