commit-tree.con commit Duh. Fix transposed characters in git-pull-script (5571be7)
   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 <ctype.h>
  11
  12#define BLOCKING (1ul << 14)
  13
  14/*
  15 * FIXME! Share the code with "write-tree.c"
  16 */
  17static void init_buffer(char **bufp, unsigned int *sizep)
  18{
  19        char *buf = xmalloc(BLOCKING);
  20        *sizep = 0;
  21        *bufp = buf;
  22}
  23
  24static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
  25{
  26        char one_line[2048];
  27        va_list args;
  28        int len;
  29        unsigned long alloc, size, newsize;
  30        char *buf;
  31
  32        va_start(args, fmt);
  33        len = vsnprintf(one_line, sizeof(one_line), fmt, args);
  34        va_end(args);
  35        size = *sizep;
  36        newsize = size + len;
  37        alloc = (size + 32767) & ~32767;
  38        buf = *bufp;
  39        if (newsize > alloc) {
  40                alloc = (newsize + 32767) & ~32767;
  41                buf = xrealloc(buf, alloc);
  42                *bufp = buf;
  43        }
  44        *sizep = newsize;
  45        memcpy(buf + size, one_line, len);
  46}
  47
  48static void remove_special(char *p)
  49{
  50        char c;
  51        char *dst = p, *src = p;
  52
  53        for (;;) {
  54                c = *src;
  55                src++;
  56                switch(c) {
  57                case '\n': case '<': case '>':
  58                        continue;
  59                }
  60                *dst++ = c;
  61                if (!c)
  62                        break;
  63        }
  64
  65        /*
  66         * Go back, and remove crud from the end: some people
  67         * have commas etc in their gecos field
  68         */
  69        dst--;
  70        while (--dst >= p) {
  71                unsigned char c = *dst;
  72                switch (c) {
  73                case ',': case ';': case '.':
  74                        *dst = 0;
  75                        continue;
  76                }
  77                break;
  78        }
  79}
  80
  81static void check_valid(unsigned char *sha1, const char *expect)
  82{
  83        void *buf;
  84        char type[20];
  85        unsigned long size;
  86
  87        buf = read_sha1_file(sha1, type, &size);
  88        if (!buf || strcmp(type, expect))
  89                die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
  90        free(buf);
  91}
  92
  93/*
  94 * Having more than two parents is not strange at all, and this is
  95 * how multi-way merges are represented.
  96 */
  97#define MAXPARENT (16)
  98static unsigned char parent_sha1[MAXPARENT][20];
  99
 100static char *commit_tree_usage = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
 101
 102static int new_parent(int idx)
 103{
 104        int i;
 105        unsigned char *sha1 = parent_sha1[idx];
 106        for (i = 0; i < idx; i++) {
 107                if (!memcmp(parent_sha1[i], sha1, 20)) {
 108                        error("duplicate parent %s ignored", sha1_to_hex(sha1));
 109                        return 0;
 110                }
 111        }
 112        return 1;
 113}
 114
 115int main(int argc, char **argv)
 116{
 117        int i, len;
 118        int parents = 0;
 119        unsigned char tree_sha1[20];
 120        unsigned char commit_sha1[20];
 121        char *gecos, *realgecos, *commitgecos;
 122        char *email, *commitemail, realemail[1000];
 123        char date[50], realdate[50];
 124        char *audate, *cmdate;
 125        char comment[1000];
 126        struct passwd *pw;
 127        char *buffer;
 128        unsigned int size;
 129
 130        if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
 131                usage(commit_tree_usage);
 132
 133        check_valid(tree_sha1, "tree");
 134        for (i = 2; i < argc; i += 2) {
 135                char *a, *b;
 136                a = argv[i]; b = argv[i+1];
 137                if (!b || strcmp(a, "-p") || get_sha1(b, parent_sha1[parents]))
 138                        usage(commit_tree_usage);
 139                check_valid(parent_sha1[parents], "commit");
 140                if (new_parent(parents))
 141                        parents++;
 142        }
 143        if (!parents)
 144                fprintf(stderr, "Committing initial tree %s\n", argv[1]);
 145        pw = getpwuid(getuid());
 146        if (!pw)
 147                die("You don't exist. Go away!");
 148        realgecos = pw->pw_gecos;
 149        len = strlen(pw->pw_name);
 150        memcpy(realemail, pw->pw_name, len);
 151        realemail[len] = '@';
 152        gethostname(realemail+len+1, sizeof(realemail)-len-1);
 153        if (!strchr(realemail+len+1, '.')) {
 154                strcat(realemail, ".");
 155                getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
 156        }
 157
 158        datestamp(realdate, sizeof(realdate));
 159        strcpy(date, realdate);
 160
 161        commitgecos = gitenv("GIT_COMMITTER_NAME") ? : realgecos;
 162        commitemail = gitenv("GIT_COMMITTER_EMAIL") ? : realemail;
 163        gecos = gitenv("GIT_AUTHOR_NAME") ? : realgecos;
 164        email = gitenv("GIT_AUTHOR_EMAIL") ? : realemail;
 165        audate = gitenv("GIT_AUTHOR_DATE");
 166        if (audate)
 167                parse_date(audate, date, sizeof(date));
 168        cmdate = gitenv("GIT_COMMITTER_DATE");
 169        if (cmdate)
 170                parse_date(cmdate, realdate, sizeof(realdate));
 171
 172        remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
 173        remove_special(email); remove_special(realemail); remove_special(commitemail);
 174
 175        init_buffer(&buffer, &size);
 176        add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
 177
 178        /*
 179         * NOTE! This ordering means that the same exact tree merged with a
 180         * different order of parents will be a _different_ changeset even
 181         * if everything else stays the same.
 182         */
 183        for (i = 0; i < parents; i++)
 184                add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
 185
 186        /* Person/date information */
 187        add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
 188        add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
 189
 190        /* And add the comment */
 191        while (fgets(comment, sizeof(comment), stdin) != NULL)
 192                add_buffer(&buffer, &size, "%s", comment);
 193
 194        write_sha1_file(buffer, size, "commit", commit_sha1);
 195        printf("%s\n", sha1_to_hex(commit_sha1));
 196        return 0;
 197}