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

2 files changed, 0 insertions, 220 deletions

diff --git a/third_party/git/sha256/block/sha256.c b/third_party/git/sha256/block/sha256.c
deleted file mode 100644
index 37850b4e52e0..000000000000
--- a/third_party/git/sha256/block/sha256.c
+++ /dev/null
@@ -1,196 +0,0 @@
-#include "git-compat-util.h"
-#include "./sha256.h"
-
-#undef RND
-#undef BLKSIZE
-
-#define BLKSIZE blk_SHA256_BLKSIZE
-
-void blk_SHA256_Init(blk_SHA256_CTX *ctx)
-{
-	ctx->offset = 0;
-	ctx->size = 0;
-	ctx->state[0] = 0x6a09e667ul;
-	ctx->state[1] = 0xbb67ae85ul;
-	ctx->state[2] = 0x3c6ef372ul;
-	ctx->state[3] = 0xa54ff53aul;
-	ctx->state[4] = 0x510e527ful;
-	ctx->state[5] = 0x9b05688cul;
-	ctx->state[6] = 0x1f83d9abul;
-	ctx->state[7] = 0x5be0cd19ul;
-}
-
-static inline uint32_t ror(uint32_t x, unsigned n)
-{
-	return (x >> n) | (x << (32 - n));
-}
-
-static inline uint32_t ch(uint32_t x, uint32_t y, uint32_t z)
-{
-	return z ^ (x & (y ^ z));
-}
-
-static inline uint32_t maj(uint32_t x, uint32_t y, uint32_t z)
-{
-	return ((x | y) & z) | (x & y);
-}
-
-static inline uint32_t sigma0(uint32_t x)
-{
-	return ror(x, 2) ^ ror(x, 13) ^ ror(x, 22);
-}
-
-static inline uint32_t sigma1(uint32_t x)
-{
-	return ror(x, 6) ^ ror(x, 11) ^ ror(x, 25);
-}
-
-static inline uint32_t gamma0(uint32_t x)
-{
-	return ror(x, 7) ^ ror(x, 18) ^ (x >> 3);
-}
-
-static inline uint32_t gamma1(uint32_t x)
-{
-	return ror(x, 17) ^ ror(x, 19) ^ (x >> 10);
-}
-
-static void blk_SHA256_Transform(blk_SHA256_CTX *ctx, const unsigned char *buf)
-{
-
-	uint32_t S[8], W[64], t0, t1;
-	int i;
-
-	/* copy state into S */
-	for (i = 0; i < 8; i++)
-		S[i] = ctx->state[i];
-
-	/* copy the state into 512-bits into W[0..15] */
-	for (i = 0; i < 16; i++, buf += sizeof(uint32_t))
-		W[i] = get_be32(buf);
-
-	/* fill W[16..63] */
-	for (i = 16; i < 64; i++)
-		W[i] = gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16];
-
-#define RND(a,b,c,d,e,f,g,h,i,ki)                    \
-	t0 = h + sigma1(e) + ch(e, f, g) + ki + W[i];   \
-	t1 = sigma0(a) + maj(a, b, c);                  \
-	d += t0;                                        \
-	h  = t0 + t1;
-
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);
-	RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);
-	RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);
-	RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);
-	RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);
-	RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);
-	RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);
-	RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);
-	RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);
-
-	for (i = 0; i < 8; i++)
-		ctx->state[i] += S[i];
-}
-
-void blk_SHA256_Update(blk_SHA256_CTX *ctx, const void *data, size_t len)
-{
-	unsigned int len_buf = ctx->size & 63;
-
-	ctx->size += len;
-
-	/* Read the data into buf and process blocks as they get full */
-	if (len_buf) {
-		unsigned int left = 64 - len_buf;
-		if (len < left)
-			left = len;
-		memcpy(len_buf + ctx->buf, data, left);
-		len_buf = (len_buf + left) & 63;
-		len -= left;
-		data = ((const char *)data + left);
-		if (len_buf)
-			return;
-		blk_SHA256_Transform(ctx, ctx->buf);
-	}
-	while (len >= 64) {
-		blk_SHA256_Transform(ctx, data);
-		data = ((const char *)data + 64);
-		len -= 64;
-	}
-	if (len)
-		memcpy(ctx->buf, data, len);
-}
-
-void blk_SHA256_Final(unsigned char *digest, blk_SHA256_CTX *ctx)
-{
-	static const unsigned char pad[64] = { 0x80 };
-	unsigned int padlen[2];
-	int i;
-
-	/* Pad with a binary 1 (ie 0x80), then zeroes, then length */
-	padlen[0] = htonl((uint32_t)(ctx->size >> 29));
-	padlen[1] = htonl((uint32_t)(ctx->size << 3));
-
-	i = ctx->size & 63;
-	blk_SHA256_Update(ctx, pad, 1 + (63 & (55 - i)));
-	blk_SHA256_Update(ctx, padlen, 8);
-
-	/* copy output */
-	for (i = 0; i < 8; i++, digest += sizeof(uint32_t))
-		put_be32(digest, ctx->state[i]);
-}
diff --git a/third_party/git/sha256/block/sha256.h b/third_party/git/sha256/block/sha256.h
deleted file mode 100644
index 5099d6421d37..000000000000
--- a/third_party/git/sha256/block/sha256.h
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef SHA256_BLOCK_SHA256_H
-#define SHA256_BLOCK_SHA256_H
-
-#define blk_SHA256_BLKSIZE 64
-
-struct blk_SHA256_CTX {
-	uint32_t state[8];
-	uint64_t size;
-	uint32_t offset;
-	uint8_t buf[blk_SHA256_BLKSIZE];
-};
-
-typedef struct blk_SHA256_CTX blk_SHA256_CTX;
-
-void blk_SHA256_Init(blk_SHA256_CTX *ctx);
-void blk_SHA256_Update(blk_SHA256_CTX *ctx, const void *data, size_t len);
-void blk_SHA256_Final(unsigned char *digest, blk_SHA256_CTX *ctx);
-
-#define platform_SHA256_CTX blk_SHA256_CTX
-#define platform_SHA256_Init blk_SHA256_Init
-#define platform_SHA256_Update blk_SHA256_Update
-#define platform_SHA256_Final blk_SHA256_Final
-
-#endif