alias.c

   1 #include "git-compat-util.h"
   2 #include "alias.h"
   3 #include "config.h"
   4 #include "gettext.h"
   5 #include "strbuf.h"
   6 #include "string-list.h"
   7
   8 struct config_alias_data {
   9         const char *alias;
  10         char *v;
  11         struct string_list *list;
  12 };
  13
  14 static int config_alias_cb(const char *key, const char *value,
  15                            const struct config_context *ctx UNUSED, void *d)
  16 {
  17         struct config_alias_data *data = d;
  18         const char *p;
  19
  20         if (!skip_prefix(key, "alias.", &p))
  21                 return 0;
  22
  23         if (data->alias) {
  24                 if (!strcasecmp(p, data->alias))
  25                         return git_config_string((const char **)&data->v,
  26                                                  key, value);
  27         } else if (data->list) {
  28                 string_list_append(data->list, p);
  29         }
  30
  31         return 0;
  32 }
  33
  34 char *alias_lookup(const char *alias)
  35 {
  36         struct config_alias_data data = { alias, NULL };
  37
  38         read_early_config(config_alias_cb, &data);
  39
  40         return data.v;
  41 }
  42
  43 void list_aliases(struct string_list *list)
  44 {
  45         struct config_alias_data data = { NULL, NULL, list };
  46
  47         read_early_config(config_alias_cb, &data);
  48 }
  49
  50 void quote_cmdline(struct strbuf *buf, const char **argv)
  51 {
  52         for (const char **argp = argv; *argp; argp++) {
  53                 if (argp != argv)
  54                         strbuf_addch(buf, ' ');
  55                 strbuf_addch(buf, '"');
  56                 for (const char *p = *argp; *p; p++) {
  57                         const char c = *p;
  58
  59                         if (c == '"' || c =='\\')
  60                                 strbuf_addch(buf, '\\');
  61                         strbuf_addch(buf, c);
  62                 }
  63                 strbuf_addch(buf, '"');
  64         }
  65 }
  66
  67 #define SPLIT_CMDLINE_BAD_ENDING 1
  68 #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2
  69 #define SPLIT_CMDLINE_ARGC_OVERFLOW 3
  70 static const char *split_cmdline_errors[] = {
  71         N_("cmdline ends with \\"),
  72         N_("unclosed quote"),
  73         N_("too many arguments"),
  74 };
  75
  76 int split_cmdline(char *cmdline, const char ***argv)
  77 {
  78         size_t src, dst, count = 0, size = 16;
  79         char quoted = 0;
  80
  81         ALLOC_ARRAY(*argv, size);
  82
  83         /* split alias_string */
  84         (*argv)[count++] = cmdline;
  85         for (src = dst = 0; cmdline[src];) {
  86                 char c = cmdline[src];
  87                 if (!quoted && isspace(c)) {
  88                         cmdline[dst++] = 0;
  89                         while (cmdline[++src]
  90                                         && isspace(cmdline[src]))
  91                                 ; /* skip */
  92                         ALLOC_GROW(*argv, count + 1, size);
  93                         (*argv)[count++] = cmdline + dst;
  94                 } else if (!quoted && (c == '\'' || c == '"')) {
  95                         quoted = c;
  96                         src++;
  97                 } else if (c == quoted) {
  98                         quoted = 0;
  99                         src++;
 100                 } else {
 101                         if (c == '\\' && quoted != '\'') {
 102                                 src++;
 103                                 c = cmdline[src];
 104                                 if (!c) {
 105                                         FREE_AND_NULL(*argv);
 106                                         return -SPLIT_CMDLINE_BAD_ENDING;
 107                                 }
 108                         }
 109                         cmdline[dst++] = c;
 110                         src++;
 111                 }
 112         }
 113
 114         cmdline[dst] = 0;
 115
 116         if (quoted) {
 117                 FREE_AND_NULL(*argv);
 118                 return -SPLIT_CMDLINE_UNCLOSED_QUOTE;
 119         }
 120
 121         if (count >= INT_MAX) {
 122                 FREE_AND_NULL(*argv);
 123                 return -SPLIT_CMDLINE_ARGC_OVERFLOW;
 124         }
 125
 126         ALLOC_GROW(*argv, count + 1, size);
 127         (*argv)[count] = NULL;
 128
 129         return count;
 130 }
 131
 132 const char *split_cmdline_strerror(int split_cmdline_errno)
 133 {
 134         return split_cmdline_errors[-split_cmdline_errno - 1];
 135 }