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![Jason Riedy](/assets/img/avatar_default.png)
Solaris 8 doesn't have the newer unsetenv() and setenv() functions, so replace them with putenv(). The one use of unsetenv() in fsck-cache.c now sets GIT_ALTERNATE_OBJECT_ DIRECTORIES to the empty string. Every place that var is used, NULLs are also replaced with empty strings, so it's ok. Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu>
186 lines
3.9 KiB
C
186 lines
3.9 KiB
C
#include "cache.h"
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#include "refs.h"
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#include "pkt-line.h"
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static const char upload_pack_usage[] = "git-upload-pack <dir>";
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#define MAX_HAS (16)
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#define MAX_NEEDS (256)
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static int nr_has = 0, nr_needs = 0;
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static unsigned char has_sha1[MAX_HAS][20];
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static unsigned char needs_sha1[MAX_NEEDS][20];
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static int strip(char *line, int len)
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{
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if (len && line[len-1] == '\n')
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line[--len] = 0;
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return len;
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}
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static void create_pack_file(void)
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{
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int fd[2];
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pid_t pid;
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if (pipe(fd) < 0)
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die("git-upload-pack: unable to create pipe");
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pid = fork();
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if (pid < 0)
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die("git-upload-pack: unable to fork git-rev-list");
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if (!pid) {
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int i;
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int args = nr_has + nr_needs + 5;
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char **argv = xmalloc(args * sizeof(char *));
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char *buf = xmalloc(args * 45);
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char **p = argv;
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dup2(fd[1], 1);
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close(0);
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close(fd[0]);
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close(fd[1]);
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*p++ = "git-rev-list";
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*p++ = "--objects";
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for (i = 0; i < nr_needs; i++) {
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*p++ = buf;
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memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
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buf += 41;
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}
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for (i = 0; i < nr_has; i++) {
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*p++ = buf;
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*buf++ = '^';
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memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
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buf += 41;
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}
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*p++ = NULL;
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execvp("git-rev-list", argv);
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die("git-upload-pack: unable to exec git-rev-list");
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}
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dup2(fd[0], 0);
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close(fd[0]);
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close(fd[1]);
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execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL);
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die("git-upload-pack: unable to exec git-pack-objects");
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}
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static int got_sha1(char *hex, unsigned char *sha1)
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{
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int nr;
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if (get_sha1_hex(hex, sha1))
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die("git-upload-pack: expected SHA1 object, got '%s'", hex);
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if (!has_sha1_file(sha1))
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return 0;
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nr = nr_has;
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if (nr < MAX_HAS) {
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memcpy(has_sha1[nr], sha1, 20);
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nr_has = nr+1;
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}
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return 1;
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}
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static int get_common_commits(void)
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{
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static char line[1000];
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unsigned char sha1[20];
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int len;
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for(;;) {
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len = packet_read_line(0, line, sizeof(line));
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if (!len) {
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packet_write(1, "NAK\n");
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continue;
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}
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len = strip(line, len);
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if (!strncmp(line, "have ", 5)) {
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if (got_sha1(line+5, sha1)) {
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packet_write(1, "ACK %s\n", sha1_to_hex(sha1));
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break;
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}
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continue;
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}
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if (!strcmp(line, "done")) {
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packet_write(1, "NAK\n");
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return -1;
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}
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die("git-upload-pack: expected SHA1 list, got '%s'", line);
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}
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for (;;) {
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len = packet_read_line(0, line, sizeof(line));
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if (!len)
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continue;
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len = strip(line, len);
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if (!strncmp(line, "have ", 5)) {
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got_sha1(line+5, sha1);
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continue;
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}
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if (!strcmp(line, "done"))
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break;
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die("git-upload-pack: expected SHA1 list, got '%s'", line);
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}
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return 0;
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}
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static int receive_needs(void)
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{
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static char line[1000];
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int len, needs;
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needs = 0;
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for (;;) {
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len = packet_read_line(0, line, sizeof(line));
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if (!len)
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return needs;
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/*
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* This is purely theoretical right now: git-fetch-pack only
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* ever asks for a single HEAD
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*/
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if (needs >= MAX_NEEDS)
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die("I'm only doing a max of %d requests", MAX_NEEDS);
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if (strncmp("want ", line, 5) || get_sha1_hex(line+5, needs_sha1[needs]))
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die("git-upload-pack: protocol error, expected to get sha, not '%s'", line);
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needs++;
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}
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}
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static int send_ref(const char *refname, const unsigned char *sha1)
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{
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packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
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return 0;
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}
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static int upload_pack(void)
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{
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head_ref(send_ref);
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for_each_ref(send_ref);
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packet_flush(1);
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nr_needs = receive_needs();
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if (!nr_needs)
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return 0;
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get_common_commits();
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create_pack_file();
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return 0;
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}
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int main(int argc, char **argv)
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{
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const char *dir;
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if (argc != 2)
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usage(upload_pack_usage);
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dir = argv[1];
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/* chdir to the directory. If that fails, try appending ".git" */
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if (chdir(dir) < 0) {
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if (chdir(mkpath("%s.git", dir)) < 0)
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die("git-upload-pack unable to chdir to %s", dir);
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}
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chdir(".git");
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if (access("objects", X_OK) || access("refs", X_OK))
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die("git-upload-pack: %s doesn't seem to be a git archive", dir);
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putenv("GIT_DIR=.");
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upload_pack();
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return 0;
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}
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