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, 273 deletions

diff --git a/third_party/git/zlib.c b/third_party/git/zlib.c
deleted file mode 100644
index d594cba3fc9d..000000000000
--- a/third_party/git/zlib.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * zlib wrappers to make sure we don't silently miss errors
- * at init time.
- */
-#include "cache.h"
-
-static const char *zerr_to_string(int status)
-{
-	switch (status) {
-	case Z_MEM_ERROR:
-		return "out of memory";
-	case Z_VERSION_ERROR:
-		return "wrong version";
-	case Z_NEED_DICT:
-		return "needs dictionary";
-	case Z_DATA_ERROR:
-		return "data stream error";
-	case Z_STREAM_ERROR:
-		return "stream consistency error";
-	default:
-		return "unknown error";
-	}
-}
-
-/*
- * avail_in and avail_out in zlib are counted in uInt, which typically
- * limits the size of the buffer we can use to 4GB when interacting
- * with zlib in a single call to inflate/deflate.
- */
-/* #define ZLIB_BUF_MAX ((uInt)-1) */
-#define ZLIB_BUF_MAX ((uInt) 1024 * 1024 * 1024) /* 1GB */
-static inline uInt zlib_buf_cap(unsigned long len)
-{
-	return (ZLIB_BUF_MAX < len) ? ZLIB_BUF_MAX : len;
-}
-
-static void zlib_pre_call(git_zstream *s)
-{
-	s->z.next_in = s->next_in;
-	s->z.next_out = s->next_out;
-	s->z.total_in = s->total_in;
-	s->z.total_out = s->total_out;
-	s->z.avail_in = zlib_buf_cap(s->avail_in);
-	s->z.avail_out = zlib_buf_cap(s->avail_out);
-}
-
-static void zlib_post_call(git_zstream *s)
-{
-	unsigned long bytes_consumed;
-	unsigned long bytes_produced;
-
-	bytes_consumed = s->z.next_in - s->next_in;
-	bytes_produced = s->z.next_out - s->next_out;
-	if (s->z.total_out != s->total_out + bytes_produced)
-		BUG("total_out mismatch");
-	if (s->z.total_in != s->total_in + bytes_consumed)
-		BUG("total_in mismatch");
-
-	s->total_out = s->z.total_out;
-	s->total_in = s->z.total_in;
-	s->next_in = s->z.next_in;
-	s->next_out = s->z.next_out;
-	s->avail_in -= bytes_consumed;
-	s->avail_out -= bytes_produced;
-}
-
-void git_inflate_init(git_zstream *strm)
-{
-	int status;
-
-	zlib_pre_call(strm);
-	status = inflateInit(&strm->z);
-	zlib_post_call(strm);
-	if (status == Z_OK)
-		return;
-	die("inflateInit: %s (%s)", zerr_to_string(status),
-	    strm->z.msg ? strm->z.msg : "no message");
-}
-
-void git_inflate_init_gzip_only(git_zstream *strm)
-{
-	/*
-	 * Use default 15 bits, +16 is to accept only gzip and to
-	 * yield Z_DATA_ERROR when fed zlib format.
-	 */
-	const int windowBits = 15 + 16;
-	int status;
-
-	zlib_pre_call(strm);
-	status = inflateInit2(&strm->z, windowBits);
-	zlib_post_call(strm);
-	if (status == Z_OK)
-		return;
-	die("inflateInit2: %s (%s)", zerr_to_string(status),
-	    strm->z.msg ? strm->z.msg : "no message");
-}
-
-void git_inflate_end(git_zstream *strm)
-{
-	int status;
-
-	zlib_pre_call(strm);
-	status = inflateEnd(&strm->z);
-	zlib_post_call(strm);
-	if (status == Z_OK)
-		return;
-	error("inflateEnd: %s (%s)", zerr_to_string(status),
-	      strm->z.msg ? strm->z.msg : "no message");
-}
-
-int git_inflate(git_zstream *strm, int flush)
-{
-	int status;
-
-	for (;;) {
-		zlib_pre_call(strm);
-		/* Never say Z_FINISH unless we are feeding everything */
-		status = inflate(&strm->z,
-				 (strm->z.avail_in != strm->avail_in)
-				 ? 0 : flush);
-		if (status == Z_MEM_ERROR)
-			die("inflate: out of memory");
-		zlib_post_call(strm);
-
-		/*
-		 * Let zlib work another round, while we can still
-		 * make progress.
-		 */
-		if ((strm->avail_out && !strm->z.avail_out) &&
-		    (status == Z_OK || status == Z_BUF_ERROR))
-			continue;
-		break;
-	}
-
-	switch (status) {
-	/* Z_BUF_ERROR: normal, needs more space in the output buffer */
-	case Z_BUF_ERROR:
-	case Z_OK:
-	case Z_STREAM_END:
-		return status;
-	default:
-		break;
-	}
-	error("inflate: %s (%s)", zerr_to_string(status),
-	      strm->z.msg ? strm->z.msg : "no message");
-	return status;
-}
-
-#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
-#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
-#endif
-
-unsigned long git_deflate_bound(git_zstream *strm, unsigned long size)
-{
-	return deflateBound(&strm->z, size);
-}
-
-void git_deflate_init(git_zstream *strm, int level)
-{
-	int status;
-
-	memset(strm, 0, sizeof(*strm));
-	zlib_pre_call(strm);
-	status = deflateInit(&strm->z, level);
-	zlib_post_call(strm);
-	if (status == Z_OK)
-		return;
-	die("deflateInit: %s (%s)", zerr_to_string(status),
-	    strm->z.msg ? strm->z.msg : "no message");
-}
-
-static void do_git_deflate_init(git_zstream *strm, int level, int windowBits)
-{
-	int status;
-
-	memset(strm, 0, sizeof(*strm));
-	zlib_pre_call(strm);
-	status = deflateInit2(&strm->z, level,
-				  Z_DEFLATED, windowBits,
-				  8, Z_DEFAULT_STRATEGY);
-	zlib_post_call(strm);
-	if (status == Z_OK)
-		return;
-	die("deflateInit2: %s (%s)", zerr_to_string(status),
-	    strm->z.msg ? strm->z.msg : "no message");
-}
-
-void git_deflate_init_gzip(git_zstream *strm, int level)
-{
-	/*
-	 * Use default 15 bits, +16 is to generate gzip header/trailer
-	 * instead of the zlib wrapper.
-	 */
-	do_git_deflate_init(strm, level, 15 + 16);
-}
-
-void git_deflate_init_raw(git_zstream *strm, int level)
-{
-	/*
-	 * Use default 15 bits, negate the value to get raw compressed
-	 * data without zlib header and trailer.
-	 */
-	do_git_deflate_init(strm, level, -15);
-}
-
-int git_deflate_abort(git_zstream *strm)
-{
-	int status;
-
-	zlib_pre_call(strm);
-	status = deflateEnd(&strm->z);
-	zlib_post_call(strm);
-	return status;
-}
-
-void git_deflate_end(git_zstream *strm)
-{
-	int status = git_deflate_abort(strm);
-
-	if (status == Z_OK)
-		return;
-	error("deflateEnd: %s (%s)", zerr_to_string(status),
-	      strm->z.msg ? strm->z.msg : "no message");
-}
-
-int git_deflate_end_gently(git_zstream *strm)
-{
-	int status;
-
-	zlib_pre_call(strm);
-	status = deflateEnd(&strm->z);
-	zlib_post_call(strm);
-	return status;
-}
-
-int git_deflate(git_zstream *strm, int flush)
-{
-	int status;
-
-	for (;;) {
-		zlib_pre_call(strm);
-
-		/* Never say Z_FINISH unless we are feeding everything */
-		status = deflate(&strm->z,
-				 (strm->z.avail_in != strm->avail_in)
-				 ? 0 : flush);
-		if (status == Z_MEM_ERROR)
-			die("deflate: out of memory");
-		zlib_post_call(strm);
-
-		/*
-		 * Let zlib work another round, while we can still
-		 * make progress.
-		 */
-		if ((strm->avail_out && !strm->z.avail_out) &&
-		    (status == Z_OK || status == Z_BUF_ERROR))
-			continue;
-		break;
-	}
-
-	switch (status) {
-	/* Z_BUF_ERROR: normal, needs more space in the output buffer */
-	case Z_BUF_ERROR:
-	case Z_OK:
-	case Z_STREAM_END:
-		return status;
-	default:
-		break;
-	}
-	error("deflate: %s (%s)", zerr_to_string(status),
-	      strm->z.msg ? strm->z.msg : "no message");
-	return status;
-}