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
|
// This file defines how to compile CLI argument parsing
#include "../environment.h"
#include "../stdlib/datatypes.h"
#include "../stdlib/optionals.h"
#include "../stdlib/text.h"
#include "../stdlib/util.h"
#include "../typecheck.h"
#include "../types.h"
#include "compilation.h"
static Text_t get_flag_options(type_t *t, const char *separator) {
if (t->tag == BoolType) {
return Text("yes|no");
} else if (t->tag == EnumType) {
Text_t options = EMPTY_TEXT;
for (tag_t *tag = Match(t, EnumType)->tags; tag; tag = tag->next) {
options = Texts(options, tag->name);
if (tag->next) options = Texts(options, separator);
}
return options;
} else if (t->tag == IntType || t->tag == NumType || t->tag == BigIntType) {
return Text("N");
} else {
return Text("...");
}
}
static OptionalText_t flagify(const char *name, bool prefix) {
if (!name) return NONE_TEXT;
Text_t flag = Text$from_str(name);
flag = Text$replace(flag, Text("_"), Text("-"));
if (prefix) flag = flag.length == 1 ? Texts("-", flag) : Texts("--", flag);
return flag;
}
public
Text_t compile_cli_arg_call(env_t *env, Text_t fn_name, type_t *fn_type, const char *version) {
DeclareMatch(fn_info, fn_type, FunctionType);
env_t *main_env = fresh_scope(env);
Text_t code = EMPTY_TEXT;
binding_t *usage_binding = get_binding(env, "_USAGE");
Text_t usage_code = usage_binding ? usage_binding->code : Text("usage");
binding_t *help_binding = get_binding(env, "_HELP");
Text_t help_code = help_binding ? help_binding->code : usage_code;
if (!usage_binding) {
bool explicit_help_flag = false;
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
if (streq(arg->name, "help")) {
explicit_help_flag = true;
break;
}
}
Text_t usage = explicit_help_flag ? EMPTY_TEXT : Text(" [--help]");
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
usage = Texts(usage, " ");
type_t *t = get_arg_type(main_env, arg);
if (arg->default_val) {
OptionalText_t flag = flagify(arg->name, true);
assert(flag.tag != TEXT_NONE);
OptionalText_t alias_flag = flagify(arg->alias, true);
Text_t flags = alias_flag.tag != TEXT_NONE ? Texts(flag, "|", alias_flag) : flag;
if (t->tag == BoolType || (t->tag == OptionalType && Match(t, OptionalType)->type->tag == BoolType))
usage = Texts(usage, "[", flags, "]");
else if (t->tag == ListType) usage = Texts(usage, "[", flags, " ", get_flag_options(t, "|"), "]");
else usage = Texts(usage, "[", flags, "=", get_flag_options(t, "|"), "]");
} else {
OptionalText_t flag = flagify(arg->name, false);
assert(flag.tag != TEXT_NONE);
OptionalText_t alias_flag = flagify(arg->alias, true);
if (t->tag == BoolType)
usage = Texts(usage, "<--", flag, alias_flag.tag != TEXT_NONE ? Texts("|", alias_flag) : EMPTY_TEXT,
"|--no-", flag, ">");
else if (t->tag == EnumType) usage = Texts(usage, get_flag_options(t, "|"));
else if (t->tag == ListType) usage = Texts(usage, "[", flag, "...]");
else usage = Texts(usage, "<", flag, ">");
}
}
code = Texts(code,
"Text_t usage = Texts(Text(\"Usage: \"), "
"Text$from_str(argv[0])",
usage.length == 0 ? EMPTY_TEXT : Texts(", Text(", quoted_text(usage), ")"), ");\n");
}
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
code = Texts(code, compile_declaration(arg->type, Texts("_$", Text$from_str(arg->name))), " = ",
compile_empty(arg->type), ";\n");
}
Text_t version_code = quoted_str(version);
code = Texts(code, "cli_arg_t cli_args[] = {\n");
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
code = Texts(code, "{", quoted_text(Text$replace(Text$from_str(arg->name), Text("_"), Text("-"))), ", &",
Texts("_$", Text$from_str(arg->name)), ", ", compile_type_info(arg->type),
arg->default_val ? Text("") : Text(", .required=true"),
arg->alias ? Texts(", .short_flag=", quoted_text(Text$from_str(arg->name)),
"[0]") // TODO: escape char properly
: Text(""),
"},\n");
}
code = Texts(code, "};\n");
code = Texts(code, "tomo_parse_args(argc, argv, ", usage_code, ", ", help_code, ", ", version_code,
", sizeof(cli_args)/sizeof(cli_args[0]), cli_args);\n");
// Lazily initialize default values to prevent side effects
int64_t i = 0;
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
if (arg->default_val) {
Text_t default_val;
if (arg->type) {
default_val = compile_to_type(env, arg->default_val, arg->type);
if (arg->type->tag != OptionalType) default_val = promote_to_optional(arg->type, default_val);
} else {
default_val = compile(env, arg->default_val);
}
code = Texts(code, "if (!cli_args[", i, "].populated) ", Texts("_$", Text$from_str(arg->name)), " = ",
default_val, ";\n");
}
i += 1;
}
code = Texts(code, fn_name, "(");
for (arg_t *arg = fn_info->args; arg; arg = arg->next) {
code = Texts(code, Texts("_$", arg->name));
if (arg->next) code = Texts(code, ", ");
}
code = Texts(code, ");\n");
return code;
}
|
