src/pacman/deptest.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

/*
 *  deptest.c
 * 
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <alpm.h>
/* pacman */
#include "util.h"
#include "list.h"
#include "conf.h"
#include "log.h"
#include "sync.h"
#include "deptest.h"

extern config_t *config;

int pacman_deptest(list_t *targets)
{
  PM_LIST *data;
  list_t *i;
  char *str;

  if(targets == NULL) {
    return(0);
  }

  if(config->op_d_vertest) {
    if(targets->data && targets->next && targets->next->data) {
      int ret = alpm_pkg_vercmp(targets->data, targets->next->data);
      printf("%d\n", ret);
      return(ret);
    }
    return(0);
  }

  /* we create a transaction to hold a dummy package to be able to use
   * deps checkings from alpm_trans_prepare() */
  if(alpm_trans_init(PM_TRANS_TYPE_ADD, 0, NULL, NULL) == -1) {
    ERR(NL, "%s", alpm_strerror(pm_errno));
    if(pm_errno == PM_ERR_HANDLE_LOCK) {
      MSG(NL, "       if you're sure a package manager is not already running,\n" \
              "       you can remove %s\n", PM_LOCK);
    }
    return(1);
  }

  /* We use a hidden facility from alpm_trans_addtarget() to add a dummy
   * target to the transaction (see the library code for details).
   * It allows us to use alpm_trans_prepare() to check dependencies of the
   * given target.
   */
  str = (char *)malloc(strlen("name=dummy|version=1.0-1")+1);
  if(str == NULL) {
    ERR(NL, "memory allocation failure\n");
    if(alpm_trans_release() == -1) {
      ERR(NL, "could not release transaction (%s)", alpm_strerror(pm_errno));
    }
    return(1);
  }
  strcpy(str, "name=dummy|version=1.0-1");
  for(i = targets; i; i = i->next) {
    str = (char *)realloc(str, strlen(str)+8+strlen(i->data)+1);
    strcat(str, "|depend=");
    strcat(str, i->data);
  }
  vprint("add target %s\n", str);
  if(alpm_trans_addtarget(str) == -1) {
    FREE(str);
    ERR(NL, "could not add target (%s)\n", alpm_strerror(pm_errno));
    if(alpm_trans_release() == -1) {
      ERR(NL, "could not release transaction (%s)", alpm_strerror(pm_errno));
    }
    return(1);
  }
  FREE(str);

  if(alpm_trans_prepare(&data) == -1) {
    PM_LIST *lp;
    int ret = 126;
    list_t *synctargs = NULL;
    /* return 126 = deps were missing, but successfully resolved
     * return 127 = deps were missing, and failed to resolve; OR
     *            = deps were missing, but no resolution was attempted; OR
     *            = unresolvable conflicts were found
     */
    switch(pm_errno) {
      case PM_ERR_UNSATISFIED_DEPS:
        for(lp = alpm_list_first(data); lp; lp = alpm_list_next(lp)) {
          PM_DEPMISS *miss = alpm_list_getdata(lp);
          if(!config->op_d_resolve) {
            MSG(NL, "requires: %s", alpm_dep_getinfo(miss, PM_DEP_NAME));
            switch((int)alpm_dep_getinfo(miss, PM_DEP_MOD)) {
              case PM_DEP_MOD_EQ: MSG(CL, "=%s", alpm_dep_getinfo(miss, PM_DEP_VERSION));  break;
              case PM_DEP_MOD_GE: MSG(CL, ">=%s", alpm_dep_getinfo(miss, PM_DEP_VERSION)); break;
              case PM_DEP_MOD_LE: MSG(CL, "<=%s", alpm_dep_getinfo(miss, PM_DEP_VERSION)); break;
            }
            MSG(CL, "\n");
          }
          synctargs = list_add(synctargs, strdup(alpm_dep_getinfo(miss, PM_DEP_NAME)));
        }
        alpm_list_free(data);
      break;
      case PM_ERR_CONFLICTING_DEPS:
        /* we can't auto-resolve conflicts */
        for(lp = alpm_list_first(data); lp; lp = alpm_list_next(lp)) {
          PM_DEPMISS *miss = alpm_list_getdata(lp);
          MSG(NL, "conflict: %s", alpm_dep_getinfo(miss, PM_DEP_NAME));
        }
        ret = 127;
        alpm_list_free(data);
      break;
      default:
        ret = 127;
      break;
    }

    if(alpm_trans_release() == -1) {
      ERR(NL, "could not release transaction (%s)", alpm_strerror(pm_errno));
      return(1);
    }

    /* attempt to resolve missing dependencies */
    /* TODO: handle version comparators (eg, glibc>=2.2.5) */
    if(ret == 126 && synctargs != NULL) {
      if(!config->op_d_resolve || pacman_sync(synctargs) != 0) {
        /* error (or -D not used) */
        ret = 127;
      }
    }
    FREELIST(synctargs);
    return(ret);
  }

  if(alpm_trans_release() == -1) {
    ERR(NL, "could not release transaction (%s)", alpm_strerror(pm_errno));
    return(1);
  }

  return(0);
}

/* vim: set ts=2 sw=2 noet: */