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b4f207f3 ÆAB |
1 | #include "builtin.h" |
2 | #include "config.h" | |
3 | #include "parse-options.h" | |
4 | ||
5 | static char const * const env__helper_usage[] = { | |
6 | N_("git env--helper --type=[bool|ulong] <options> <env-var>"), | |
7 | NULL | |
8 | }; | |
9 | ||
424e28fc | 10 | enum cmdmode { |
b4f207f3 ÆAB |
11 | ENV_HELPER_TYPE_BOOL = 1, |
12 | ENV_HELPER_TYPE_ULONG | |
424e28fc | 13 | }; |
b4f207f3 ÆAB |
14 | |
15 | static int option_parse_type(const struct option *opt, const char *arg, | |
16 | int unset) | |
17 | { | |
424e28fc JK |
18 | enum cmdmode *cmdmode = opt->value; |
19 | ||
8d2aa8df JK |
20 | BUG_ON_OPT_NEG(unset); |
21 | ||
b4f207f3 | 22 | if (!strcmp(arg, "bool")) |
424e28fc | 23 | *cmdmode = ENV_HELPER_TYPE_BOOL; |
b4f207f3 | 24 | else if (!strcmp(arg, "ulong")) |
424e28fc | 25 | *cmdmode = ENV_HELPER_TYPE_ULONG; |
b4f207f3 ÆAB |
26 | else |
27 | die(_("unrecognized --type argument, %s"), arg); | |
28 | ||
29 | return 0; | |
30 | } | |
31 | ||
32 | int cmd_env__helper(int argc, const char **argv, const char *prefix) | |
33 | { | |
34 | int exit_code = 0; | |
35 | const char *env_variable = NULL; | |
36 | const char *env_default = NULL; | |
37 | int ret; | |
38 | int ret_int, default_int; | |
39 | unsigned long ret_ulong, default_ulong; | |
424e28fc | 40 | enum cmdmode cmdmode = 0; |
b4f207f3 ÆAB |
41 | struct option opts[] = { |
42 | OPT_CALLBACK_F(0, "type", &cmdmode, N_("type"), | |
43 | N_("value is given this type"), PARSE_OPT_NONEG, | |
44 | option_parse_type), | |
45 | OPT_STRING(0, "default", &env_default, N_("value"), | |
46 | N_("default for git_env_*(...) to fall back on")), | |
47 | OPT_BOOL(0, "exit-code", &exit_code, | |
48 | N_("be quiet only use git_env_*() value as exit code")), | |
49 | OPT_END(), | |
50 | }; | |
51 | ||
52 | argc = parse_options(argc, argv, prefix, opts, env__helper_usage, | |
53 | PARSE_OPT_KEEP_UNKNOWN); | |
54 | if (env_default && !*env_default) | |
55 | usage_with_options(env__helper_usage, opts); | |
56 | if (!cmdmode) | |
57 | usage_with_options(env__helper_usage, opts); | |
58 | if (argc != 1) | |
59 | usage_with_options(env__helper_usage, opts); | |
60 | env_variable = argv[0]; | |
61 | ||
62 | switch (cmdmode) { | |
63 | case ENV_HELPER_TYPE_BOOL: | |
64 | if (env_default) { | |
65 | default_int = git_parse_maybe_bool(env_default); | |
66 | if (default_int == -1) { | |
67 | error(_("option `--default' expects a boolean value with `--type=bool`, not `%s`"), | |
68 | env_default); | |
69 | usage_with_options(env__helper_usage, opts); | |
70 | } | |
71 | } else { | |
72 | default_int = 0; | |
73 | } | |
74 | ret_int = git_env_bool(env_variable, default_int); | |
75 | if (!exit_code) | |
76 | puts(ret_int ? "true" : "false"); | |
77 | ret = ret_int; | |
78 | break; | |
79 | case ENV_HELPER_TYPE_ULONG: | |
80 | if (env_default) { | |
81 | if (!git_parse_ulong(env_default, &default_ulong)) { | |
82 | error(_("option `--default' expects an unsigned long value with `--type=ulong`, not `%s`"), | |
83 | env_default); | |
84 | usage_with_options(env__helper_usage, opts); | |
85 | } | |
86 | } else { | |
87 | default_ulong = 0; | |
88 | } | |
89 | ret_ulong = git_env_ulong(env_variable, default_ulong); | |
90 | if (!exit_code) | |
91 | printf("%lu\n", ret_ulong); | |
92 | ret = ret_ulong; | |
93 | break; | |
94 | default: | |
95 | BUG("unknown <type> value"); | |
96 | break; | |
97 | } | |
98 | ||
99 | return !ret; | |
100 | } |