Ports: Add git port

There are various issues with this port that need to be fixed, but it's
at least possible to inspect and modify the SerenityOS repo if I clone
it into the disk image from the outside.

Very cool! :^)

Ports/git/package.sh

@@ -0,0 +1,16 @@
+#!/bin/bash ../.port_include.sh
+port=git
+version=2.25.1
+useconfigure="true"
+files="https://mirrors.edge.kernel.org/pub/software/scm/git/git-${version}.tar.xz git-${version}.tar.xz"
+configopts="--target=i686-pc-serenity"
+depends="zlib"
+
+build() {
+ run make $makeopts
+ run make strip
+}
+
+export NO_OPENSSL=1
+export ac_cv_fread_reads_directories=no
+export ac_cv_snprintf_returns_bogus=no

Ports/git/patches/serenity-hacks.patch

@@ -0,0 +1,136 @@
+diff -ru git-2.25.1/commit-graph.c git-2.25.1-serenity/commit-graph.c
+--- git-2.25.1/commit-graph.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/commit-graph.c 2020-02-20 06:44:32.062023438 +0100
+@@ -130,7 +130,7 @@
+ error(_("commit-graph file is too small"));
+ return NULL;
+ }
+- graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
++ graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_SHARED, fd, 0);
+ ret = parse_commit_graph(graph_map, fd, graph_size);
+
+ if (!ret) {
+diff -ru git-2.25.1/config.c git-2.25.1-serenity/config.c
+--- git-2.25.1/config.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/config.c 2020-02-20 06:44:32.062023438 +0100
+@@ -2841,7 +2841,7 @@
+
+ contents_sz = xsize_t(st.st_size);
+ contents = xmmap_gently(NULL, contents_sz, PROT_READ,
+- MAP_PRIVATE, in_fd, 0);
++ MAP_SHARED, in_fd, 0);
+ if (contents == MAP_FAILED) {
+ if (errno == ENODEV && S_ISDIR(st.st_mode))
+ errno = EISDIR;
+diff -ru git-2.25.1/config.mak.uname git-2.25.1-serenity/config.mak.uname
+--- git-2.25.1/config.mak.uname 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/config.mak.uname 2020-02-20 06:20:22.532687832 +0100
+@@ -4,12 +4,12 @@
+ # Microsoft's Safe Exception Handling in libraries (such as zlib).
+ # Typically required for VS2013+/32-bit compilation on Vista+ versions.
+
+-uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
+-uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
+-uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
+-uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
+-uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
+-uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
++uname_S := 
++uname_M := 
++uname_O := 
++uname_R := 
++uname_P := 
++uname_V := 
+
+ ifdef MSVC
+ # avoid the MingW and Cygwin configuration sections
+diff -ru git-2.25.1/diff.c git-2.25.1-serenity/diff.c
+--- git-2.25.1/diff.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/diff.c 2020-02-20 06:44:32.070023410 +0100
+@@ -3994,7 +3994,7 @@
+ fd = open(s->path, O_RDONLY);
+ if (fd < 0)
+ goto err_empty;
+- s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
++ s->data = xmmap(NULL, s->size, PROT_READ, MAP_SHARED, fd, 0);
+ close(fd);
+ s->should_munmap = 1;
+
+diff -ru git-2.25.1/midx.c git-2.25.1-serenity/midx.c
+--- git-2.25.1/midx.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/midx.c 2020-02-20 06:44:32.082023367 +0100
+@@ -71,7 +71,7 @@
+
+ FREE_AND_NULL(midx_name);
+
+- midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_PRIVATE, fd, 0);
++ midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_SHARED, fd, 0);
+
+ FLEX_ALLOC_STR(m, object_dir, object_dir);
+ m->fd = fd;
+diff -ru git-2.25.1/pack-bitmap.c git-2.25.1-serenity/pack-bitmap.c
+--- git-2.25.1/pack-bitmap.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/pack-bitmap.c 2020-02-20 06:44:32.086023353 +0100
+@@ -288,7 +288,7 @@
+
+ bitmap_git->pack = packfile;
+ bitmap_git->map_size = xsize_t(st.st_size);
+- bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0);
++ bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_SHARED, fd, 0);
+ bitmap_git->map_pos = 0;
+ close(fd);
+
+diff -ru git-2.25.1/packfile.c git-2.25.1-serenity/packfile.c
+--- git-2.25.1/packfile.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/packfile.c 2020-02-20 06:44:32.086023353 +0100
+@@ -97,7 +97,7 @@
+ close(fd);
+ return error("index file %s is too small", path);
+ }
+- idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0);
++ idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_SHARED, fd, 0);
+ close(fd);
+
+ ret = load_idx(path, hashsz, idx_map, idx_size, p);
+@@ -653,7 +653,7 @@
+ && unuse_one_window(p))
+ ; /* nothing */
+ win->base = xmmap_gently(NULL, win->len,
+- PROT_READ, MAP_PRIVATE,
++ PROT_READ, MAP_SHARED,
+ p->pack_fd, win->offset);
+ if (win->base == MAP_FAILED)
+ die_errno("packfile %s cannot be mapped",
+diff -ru git-2.25.1/read-cache.c git-2.25.1-serenity/read-cache.c
+--- git-2.25.1/read-cache.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/read-cache.c 2020-02-20 06:44:32.090023338 +0100
+@@ -2177,7 +2177,7 @@
+ if (mmap_size < sizeof(struct cache_header) + the_hash_algo->rawsz)
+ die(_("%s: index file smaller than expected"), path);
+
+- mmap = xmmap_gently(NULL, mmap_size, PROT_READ, MAP_PRIVATE, fd, 0);
++ mmap = xmmap_gently(NULL, mmap_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (mmap == MAP_FAILED)
+ die_errno(_("%s: unable to map index file"), path);
+ close(fd);
+diff -ru git-2.25.1/sha1-file.c git-2.25.1-serenity/sha1-file.c
+--- git-2.25.1/sha1-file.c 2020-02-17 05:47:35.000000000 +0100
++++ git-2.25.1-serenity/sha1-file.c 2020-02-20 06:44:32.102023295 +0100
+@@ -1129,7 +1129,7 @@
+ close(fd);
+ return NULL;
+ }
+- map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0);
++ map = xmmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
+ }
+ close(fd);
+ }
+@@ -2073,7 +2073,7 @@
+ ret = index_mem(istate, oid, buf, size, type, path, flags);
+ free(buf);
+ } else {
+- void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
++ void *buf = xmmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
+ ret = index_mem(istate, oid, buf, size, type, path, flags);
+ munmap(buf, size);
+ }