Andrew's git - gitweb.git/blob

   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7
   8#include <pwd.h>
   9#include <time.h>
  10#include <string.h>
  11#include <ctype.h>
  12#include <time.h>
  13
  14#define BLOCKING (1ul << 14)
  15
  16/*
  17 * FIXME! Share the code with "write-tree.c"
  18 */
  19static void init_buffer(char **bufp, unsigned int *sizep)
  20{
  21        char *buf = malloc(BLOCKING);
  22        *sizep = 0;
  23        *bufp = buf;
  24}
  25
  26static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
  27{
  28        char one_line[2048];
  29        va_list args;
  30        int len;
  31        unsigned long alloc, size, newsize;
  32        char *buf;
  33
  34        va_start(args, fmt);
  35        len = vsnprintf(one_line, sizeof(one_line), fmt, args);
  36        va_end(args);
  37        size = *sizep;
  38        newsize = size + len;
  39        alloc = (size + 32767) & ~32767;
  40        buf = *bufp;
  41        if (newsize > alloc) {
  42                alloc = (newsize + 32767) & ~32767;
  43                buf = realloc(buf, alloc);
  44                *bufp = buf;
  45        }
  46        *sizep = newsize;
  47        memcpy(buf + size, one_line, len);
  48}
  49
  50static void remove_special(char *p)
  51{
  52        char c;
  53        char *dst = p, *src = p;
  54
  55        for (;;) {
  56                c = *src;
  57                src++;
  58                switch(c) {
  59                case '\n': case '<': case '>':
  60                        continue;
  61                }
  62                *dst++ = c;
  63                if (!c)
  64                        break;
  65        }
  66
  67        /*
  68         * Go back, and remove crud from the end: some people
  69         * have commas etc in their gecos field
  70         */
  71        dst--;
  72        while (--dst >= p) {
  73                unsigned char c = *dst;
  74                switch (c) {
  75                case ',': case ';': case '.':
  76                        *dst = 0;
  77                        continue;
  78                }
  79                break;
  80        }
  81}
  82
  83static const char *month_names[] = {
  84        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  85        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  86};
  87
  88static const char *weekday_names[] = {
  89        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  90};
  91
  92
  93static char *skipfws(char *str)
  94{
  95        while (isspace(*str))
  96                str++;
  97        return str;
  98}
  99
 100        
 101/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
 102   (i.e. English) day/month names, and it doesn't work correctly with %z. */
 103static void parse_rfc2822_date(char *date, char *result, int maxlen)
 104{
 105        struct tm tm;
 106        char *p;
 107        int i, offset;
 108        time_t then;
 109
 110        memset(&tm, 0, sizeof(tm));
 111
 112        /* Skip day-name */
 113        p = skipfws(date);
 114        if (!isdigit(*p)) {
 115                for (i=0; i<7; i++) {
 116                        if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
 117                                p = skipfws(p+4);
 118                                goto day;
 119                        }
 120                }
 121                return;
 122        }                                       
 123
 124        /* day */
 125 day:
 126        tm.tm_mday = strtoul(p, &p, 10);
 127
 128        if (tm.tm_mday < 1 || tm.tm_mday > 31)
 129                return;
 130
 131        if (!isspace(*p))
 132                return;
 133
 134        p = skipfws(p);
 135
 136        /* month */
 137
 138        for (i=0; i<12; i++) {
 139                if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
 140                        tm.tm_mon = i;
 141                        p = skipfws(p+strlen(month_names[i]));
 142                        goto year;
 143                }
 144        }
 145        return; /* Error -- bad month */
 146
 147        /* year */
 148 year:  
 149        tm.tm_year = strtoul(p, &p, 10);
 150
 151        if (!tm.tm_year && !isspace(*p))
 152                return;
 153
 154        if (tm.tm_year > 1900)
 155                tm.tm_year -= 1900;
 156                
 157        p=skipfws(p);
 158
 159        /* hour */
 160        if (!isdigit(*p))
 161                return;
 162        tm.tm_hour = strtoul(p, &p, 10);
 163        
 164        if (!tm.tm_hour > 23)
 165                return;
 166
 167        if (*p != ':')
 168                return; /* Error -- bad time */
 169        p++;
 170
 171        /* minute */
 172        if (!isdigit(*p))
 173                return;
 174        tm.tm_min = strtoul(p, &p, 10);
 175        
 176        if (!tm.tm_min > 59)
 177                return;
 178
 179        if (isspace(*p))
 180                goto zone;
 181
 182        if (*p != ':')
 183                return; /* Error -- bad time */
 184        p++;
 185
 186        /* second */
 187        if (!isdigit(*p))
 188                return;
 189        tm.tm_sec = strtoul(p, &p, 10);
 190        
 191        if (!tm.tm_sec > 59)
 192                return;
 193
 194        if (!isspace(*p))
 195                return;
 196
 197 zone:
 198        p = skipfws(p);
 199
 200        if (*p == '-')
 201                offset = -60;
 202        else if (*p == '+')
 203                offset = 60;
 204        else
 205               return;
 206
 207        if (!isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]) || !isdigit(p[4]))
 208                return;
 209
 210        i = strtoul(p+1, NULL, 10);
 211        offset *= ((i % 100) + ((i / 100) * 60));
 212
 213        if (*(skipfws(p + 5)))
 214                return;
 215
 216        then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
 217        if (then == -1)
 218                return;
 219
 220        then -= offset;
 221
 222        snprintf(result, maxlen, "%lu %5.5s", then, p);
 223}
 224
 225static void check_valid(unsigned char *sha1, const char *expect)
 226{
 227        void *buf;
 228        char type[20];
 229        unsigned long size;
 230
 231        buf = read_sha1_file(sha1, type, &size);
 232        if (!buf || strcmp(type, expect))
 233                die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
 234        free(buf);
 235}
 236
 237/*
 238 * Having more than two parents is not strange at all, and this is
 239 * how multi-way merges are represented.
 240 */
 241#define MAXPARENT (16)
 242
 243static char *commit_tree_usage = "commit-tree <sha1> [-p <sha1>]* < changelog";
 244
 245int main(int argc, char **argv)
 246{
 247        int i, len;
 248        int parents = 0;
 249        unsigned char tree_sha1[20];
 250        unsigned char parent_sha1[MAXPARENT][20];
 251        unsigned char commit_sha1[20];
 252        char *gecos, *realgecos, *commitgecos;
 253        char *email, *commitemail, realemail[1000];
 254        char date[20], realdate[20];
 255        char *audate;
 256        char comment[1000];
 257        struct passwd *pw;
 258        time_t now;
 259        struct tm *tm;
 260        char *buffer;
 261        unsigned int size;
 262
 263        if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
 264                usage(commit_tree_usage);
 265
 266        check_valid(tree_sha1, "tree");
 267        for (i = 2; i < argc; i += 2) {
 268                char *a, *b;
 269                a = argv[i]; b = argv[i+1];
 270                if (!b || strcmp(a, "-p") || get_sha1_hex(b, parent_sha1[parents]))
 271                        usage(commit_tree_usage);
 272                check_valid(parent_sha1[parents], "commit");
 273                parents++;
 274        }
 275        if (!parents)
 276                fprintf(stderr, "Committing initial tree %s\n", argv[1]);
 277        pw = getpwuid(getuid());
 278        if (!pw)
 279                die("You don't exist. Go away!");
 280        realgecos = pw->pw_gecos;
 281        len = strlen(pw->pw_name);
 282        memcpy(realemail, pw->pw_name, len);
 283        realemail[len] = '@';
 284        gethostname(realemail+len+1, sizeof(realemail)-len-1);
 285        if (!strchr(realemail+len+1, '.')) {
 286                strcat(realemail, ".");
 287                getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
 288        }
 289        time(&now);
 290        tm = localtime(&now);
 291
 292        strftime(realdate, sizeof(realdate), "%s %z", tm);
 293        strcpy(date, realdate);
 294
 295        commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
 296        commitemail = getenv("COMMIT_AUTHOR_EMAIL") ? : realemail;
 297        gecos = getenv("AUTHOR_NAME") ? : realgecos;
 298        email = getenv("AUTHOR_EMAIL") ? : realemail;
 299        audate = getenv("AUTHOR_DATE");
 300        if (audate)
 301                parse_rfc2822_date(audate, date, sizeof(date));
 302
 303        remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
 304        remove_special(email); remove_special(realemail); remove_special(commitemail);
 305
 306        init_buffer(&buffer, &size);
 307        add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
 308
 309        /*
 310         * NOTE! This ordering means that the same exact tree merged with a
 311         * different order of parents will be a _different_ changeset even
 312         * if everything else stays the same.
 313         */
 314        for (i = 0; i < parents; i++)
 315                add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
 316
 317        /* Person/date information */
 318        add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
 319        add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
 320
 321        /* And add the comment */
 322        while (fgets(comment, sizeof(comment), stdin) != NULL)
 323                add_buffer(&buffer, &size, "%s", comment);
 324
 325        write_sha1_file(buffer, size, "commit", commit_sha1);
 326        printf("%s\n", sha1_to_hex(commit_sha1));
 327        return 0;
 328}