projects / thirdparty / git.git / blame
| Commit | Line | Data |
|---|---|---|
| def88e9a LT |
1 | #include "cache.h" |
| 2 | #include "refs.h" | |
| 3 | #include "pkt-line.h" | |
| 4 | ||
| 5 | static const char upload_pack_usage[] = "git-upload-pack <dir>"; | |
| 6 | ||
| fb9040cc LT |
7 | #define MAX_HAS (16) |
| 8 | #define MAX_NEEDS (16) | |
| 9 | static int nr_has = 0, nr_needs = 0; | |
| 10 | static unsigned char has_sha1[MAX_HAS][20]; | |
| 11 | static unsigned char needs_sha1[MAX_NEEDS][20]; | |
| 12 | ||
| 13 | static void create_pack_file(void) | |
| 14 | { | |
| 15 | /* | |
| 16 | * Here, we should do | |
| 17 | * | |
| 18 | * git-rev-list --objects needs_sha1 --not has_sha1 | | |
| 19 | * git-pack-objects --stdout | |
| 20 | * | |
| 21 | * but we don't. | |
| 22 | */ | |
| 23 | } | |
| 24 | ||
| def88e9a LT |
25 | static int got_sha1(char *hex, unsigned char *sha1) |
| 26 | { | |
| fb9040cc | 27 | int nr; |
| def88e9a LT |
28 | if (get_sha1_hex(hex, sha1)) |
| 29 | die("git-upload-pack: expected SHA1 object, got '%s'", hex); | |
| fb9040cc LT |
30 | if (!has_sha1_file(sha1)) |
| 31 | return 0; | |
| 32 | nr = nr_has; | |
| 33 | if (nr < MAX_HAS) { | |
| 34 | memcpy(has_sha1[nr], sha1, 20); | |
| 35 | nr_has = nr+1; | |
| 36 | } | |
| 37 | return 1; | |
| def88e9a LT |
38 | } |
| 39 | ||
| 40 | static int get_common_commits(void) | |
| 41 | { | |
| 42 | static char line[1000]; | |
| 43 | unsigned char sha1[20]; | |
| 44 | int len; | |
| 45 | ||
| 46 | for(;;) { | |
| 47 | len = packet_read_line(0, line, sizeof(line)); | |
| 48 | ||
| 49 | if (!len) { | |
| 50 | packet_write(1, "NAK\n"); | |
| 51 | continue; | |
| 52 | } | |
| 53 | if (line[len-1] == '\n') | |
| 54 | line[--len] = 0; | |
| 55 | if (!strncmp(line, "have ", 5)) { | |
| 56 | if (got_sha1(line+5, sha1)) { | |
| 57 | packet_write(1, "ACK %s\n", sha1_to_hex(sha1)); | |
| 58 | break; | |
| 59 | } | |
| 60 | continue; | |
| 61 | } | |
| 62 | if (!strcmp(line, "done")) { | |
| 63 | packet_write(1, "NAK\n"); | |
| 64 | return -1; | |
| 65 | } | |
| 66 | die("git-upload-pack: expected SHA1 list, got '%s'", line); | |
| 67 | } | |
| 68 | ||
| 69 | for (;;) { | |
| 70 | len = packet_read_line(0, line, sizeof(line)); | |
| 71 | if (!len) | |
| 72 | break; | |
| 73 | if (!strncmp(line, "have ", 5)) { | |
| 74 | got_sha1(line+5, sha1); | |
| 75 | continue; | |
| 76 | } | |
| 77 | if (!strcmp(line, "done")) | |
| 78 | break; | |
| 79 | die("git-upload-pack: expected SHA1 list, got '%s'", line); | |
| 80 | } | |
| 81 | return 0; | |
| 82 | } | |
| 83 | ||
| fb9040cc LT |
84 | static int receive_needs(void) |
| 85 | { | |
| 86 | static char line[1000]; | |
| 87 | int len, needs; | |
| 88 | ||
| 89 | needs = 0; | |
| 90 | for (;;) { | |
| 91 | len = packet_read_line(0, line, sizeof(line)); | |
| 92 | if (!len) | |
| 93 | return needs; | |
| 94 | ||
| 95 | /* | |
| 96 | * This is purely theoretical right now: git-fetch-pack only | |
| 97 | * ever asks for a single HEAD | |
| 98 | */ | |
| 99 | if (needs >= MAX_NEEDS) | |
| 100 | die("I'm only doing a max of %d requests", MAX_NEEDS); | |
| 101 | if (strncmp("want ", line, 5) || get_sha1_hex(line+5, needs_sha1[needs])) | |
| 102 | die("git-upload-pack: protocol error, expected to get sha, not '%s'", line); | |
| 103 | needs++; | |
| 104 | } | |
| 105 | } | |
| 106 | ||
| def88e9a LT |
107 | static int send_ref(const char *refname, const unsigned char *sha1) |
| 108 | { | |
| 109 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname); | |
| 110 | return 0; | |
| 111 | } | |
| 112 | ||
| 113 | static int upload_pack(void) | |
| 114 | { | |
| 115 | for_each_ref(send_ref); | |
| 116 | packet_flush(1); | |
| fb9040cc LT |
117 | nr_needs = receive_needs(); |
| 118 | if (!nr_needs) | |
| 119 | return 0; | |
| def88e9a | 120 | get_common_commits(); |
| fb9040cc | 121 | create_pack_file(); |
| def88e9a LT |
122 | return 0; |
| 123 | } | |
| 124 | ||
| 125 | int main(int argc, char **argv) | |
| 126 | { | |
| 127 | const char *dir; | |
| 128 | if (argc != 2) | |
| 129 | usage(upload_pack_usage); | |
| 130 | dir = argv[1]; | |
| 131 | if (chdir(dir)) | |
| 132 | die("git-upload-pack unable to chdir to %s", dir); | |
| 133 | chdir(".git"); | |
| 134 | if (access("objects", X_OK) || access("refs", X_OK)) | |
| 135 | die("git-upload-pack: %s doesn't seem to be a git archive", dir); | |
| 136 | setenv("GIT_DIR", ".", 1); | |
| 137 | upload_pack(); | |
| 138 | return 0; | |
| 139 | } |