| 1 | #define USE_THE_REPOSITORY_VARIABLE |
| 2 | |
| 3 | #include "git-compat-util.h" |
| 4 | #include "alias.h" |
| 5 | #include "config.h" |
| 6 | #include "gettext.h" |
| 7 | #include "strbuf.h" |
| 8 | #include "string-list.h" |
| 9 | |
| 10 | struct config_alias_data { |
| 11 | const char *alias; |
| 12 | char *v; |
| 13 | struct string_list *list; |
| 14 | }; |
| 15 | |
| 16 | static int config_alias_cb(const char *var, const char *value, |
| 17 | const struct config_context *ctx UNUSED, void *d) |
| 18 | { |
| 19 | struct config_alias_data *data = d; |
| 20 | const char *subsection, *key; |
| 21 | size_t subsection_len; |
| 22 | |
| 23 | if (parse_config_key(var, "alias", &subsection, &subsection_len, |
| 24 | &key) < 0) |
| 25 | return 0; |
| 26 | |
| 27 | /* |
| 28 | * Two config syntaxes: |
| 29 | * - alias.name = value (without subsection, case-insensitive) |
| 30 | * - [alias "name"] |
| 31 | * command = value (with subsection, case-sensitive) |
| 32 | */ |
| 33 | /* Treat [alias ""] (empty subsection) the same as plain [alias]. */ |
| 34 | if (subsection && !subsection_len) |
| 35 | subsection = NULL; |
| 36 | |
| 37 | if (subsection && strcmp(key, "command")) { |
| 38 | /* |
| 39 | * We have historically supported the "alias.name" form when |
| 40 | * "name" happens to contain dots (e.g., alias.foo.bar to allow |
| 41 | * "git foo.bar". But our parsing above would split that into |
| 42 | * subsection "foo". |
| 43 | * |
| 44 | * If we do not understand the final key in a subsection-style |
| 45 | * variable, fall back to treating it as a two-level alias. |
| 46 | */ |
| 47 | key = var + strlen("alias."); |
| 48 | subsection = NULL; |
| 49 | subsection_len = 0; |
| 50 | } |
| 51 | |
| 52 | if (data->alias) { |
| 53 | int match; |
| 54 | |
| 55 | if (subsection) |
| 56 | match = (strlen(data->alias) == subsection_len && |
| 57 | !strncmp(data->alias, subsection, |
| 58 | subsection_len)); |
| 59 | else |
| 60 | match = !strcasecmp(data->alias, key); |
| 61 | |
| 62 | if (match) { |
| 63 | FREE_AND_NULL(data->v); |
| 64 | return git_config_string(&data->v, |
| 65 | var, value); |
| 66 | } |
| 67 | } else if (data->list) { |
| 68 | struct string_list_item *item; |
| 69 | |
| 70 | if (!value) |
| 71 | return config_error_nonbool(var); |
| 72 | |
| 73 | if (subsection) |
| 74 | item = string_list_append_nodup(data->list, |
| 75 | xmemdupz(subsection, subsection_len)); |
| 76 | else |
| 77 | item = string_list_append(data->list, key); |
| 78 | item->util = xstrdup(value); |
| 79 | } |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | char *alias_lookup(const char *alias) |
| 85 | { |
| 86 | struct config_alias_data data = { alias, NULL }; |
| 87 | |
| 88 | read_early_config(the_repository, config_alias_cb, &data); |
| 89 | |
| 90 | return data.v; |
| 91 | } |
| 92 | |
| 93 | void list_aliases(struct string_list *list) |
| 94 | { |
| 95 | struct config_alias_data data = { NULL, NULL, list }; |
| 96 | |
| 97 | read_early_config(the_repository, config_alias_cb, &data); |
| 98 | } |
| 99 | |
| 100 | void quote_cmdline(struct strbuf *buf, const char **argv) |
| 101 | { |
| 102 | for (const char **argp = argv; *argp; argp++) { |
| 103 | if (argp != argv) |
| 104 | strbuf_addch(buf, ' '); |
| 105 | strbuf_addch(buf, '"'); |
| 106 | for (const char *p = *argp; *p; p++) { |
| 107 | const char c = *p; |
| 108 | |
| 109 | if (c == '"' || c =='\\') |
| 110 | strbuf_addch(buf, '\\'); |
| 111 | strbuf_addch(buf, c); |
| 112 | } |
| 113 | strbuf_addch(buf, '"'); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | #define SPLIT_CMDLINE_BAD_ENDING 1 |
| 118 | #define SPLIT_CMDLINE_UNCLOSED_QUOTE 2 |
| 119 | #define SPLIT_CMDLINE_ARGC_OVERFLOW 3 |
| 120 | static const char *split_cmdline_errors[] = { |
| 121 | N_("cmdline ends with \\"), |
| 122 | N_("unclosed quote"), |
| 123 | N_("too many arguments"), |
| 124 | }; |
| 125 | |
| 126 | int split_cmdline(char *cmdline, const char ***argv) |
| 127 | { |
| 128 | size_t src, dst, count = 0, size = 16; |
| 129 | char quoted = 0; |
| 130 | |
| 131 | ALLOC_ARRAY(*argv, size); |
| 132 | |
| 133 | /* split alias_string */ |
| 134 | (*argv)[count++] = cmdline; |
| 135 | for (src = dst = 0; cmdline[src];) { |
| 136 | char c = cmdline[src]; |
| 137 | if (!quoted && isspace(c)) { |
| 138 | cmdline[dst++] = 0; |
| 139 | while (cmdline[++src] |
| 140 | && isspace(cmdline[src])) |
| 141 | ; /* skip */ |
| 142 | ALLOC_GROW(*argv, count + 1, size); |
| 143 | (*argv)[count++] = cmdline + dst; |
| 144 | } else if (!quoted && (c == '\'' || c == '"')) { |
| 145 | quoted = c; |
| 146 | src++; |
| 147 | } else if (c == quoted) { |
| 148 | quoted = 0; |
| 149 | src++; |
| 150 | } else { |
| 151 | if (c == '\\' && quoted != '\'') { |
| 152 | src++; |
| 153 | c = cmdline[src]; |
| 154 | if (!c) { |
| 155 | FREE_AND_NULL(*argv); |
| 156 | return -SPLIT_CMDLINE_BAD_ENDING; |
| 157 | } |
| 158 | } |
| 159 | cmdline[dst++] = c; |
| 160 | src++; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | cmdline[dst] = 0; |
| 165 | |
| 166 | if (quoted) { |
| 167 | FREE_AND_NULL(*argv); |
| 168 | return -SPLIT_CMDLINE_UNCLOSED_QUOTE; |
| 169 | } |
| 170 | |
| 171 | if (count >= INT_MAX) { |
| 172 | FREE_AND_NULL(*argv); |
| 173 | return -SPLIT_CMDLINE_ARGC_OVERFLOW; |
| 174 | } |
| 175 | |
| 176 | ALLOC_GROW(*argv, count + 1, size); |
| 177 | (*argv)[count] = NULL; |
| 178 | |
| 179 | return count; |
| 180 | } |
| 181 | |
| 182 | const char *split_cmdline_strerror(int split_cmdline_errno) |
| 183 | { |
| 184 | return split_cmdline_errors[-split_cmdline_errno - 1]; |
| 185 | } |