-
Notifications
You must be signed in to change notification settings - Fork 9
/
mod.rs
373 lines (341 loc) · 7.97 KB
/
mod.rs
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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
mod author;
mod environment;
mod flag;
mod option;
use self::author::Author;
use self::environment::Env;
use self::flag::Flag;
use self::option::Opt;
use roff::{bold, italic, list, Roff, Troffable};
use std::convert::AsRef;
/// Man page struct.
#[derive(Debug)]
pub struct Man {
name: String,
description: Option<String>,
authors: Vec<Author>,
flags: Vec<Flag>,
options: Vec<Opt>,
environment: Vec<Env>,
arguments: Vec<String>,
}
impl Man {
/// Create a new instance.
pub fn new(name: &str) -> Self {
Self {
name: name.into(),
description: None,
authors: vec![],
flags: vec![],
options: vec![],
arguments: vec![],
environment: vec![],
}
}
/// Add a description.
pub fn description(mut self, desc: &str) -> Self {
let desc = desc.into();
self.description = Some(desc);
self
}
/// Add an author.
pub fn author(
mut self,
name: impl AsRef<str>,
email: Option<String>,
) -> Self {
self.authors.push(Author {
name: name.as_ref().to_owned(),
email,
});
self
}
/// Add an environment variable.
pub fn environment(
mut self,
name: String,
default: Option<String>,
description: Option<String>,
) -> Self {
self.environment.push(Env {
name,
default,
description,
});
self
}
/// Add an flag.
pub fn flag(
mut self,
short: Option<String>,
long: Option<String>,
description: Option<String>,
) -> Self {
self.flags.push(Flag {
short,
long,
description,
});
self
}
/// Add an option.
pub fn option(
mut self,
short: Option<String>,
long: Option<String>,
description: Option<String>,
argument: String,
default: Option<String>,
) -> Self {
self.options.push(Opt {
short,
long,
description,
argument,
default,
});
self
}
/// Add a positional argument. The items are displayed in the order they're
/// pushed.
// TODO: make this accept argument vecs / optional args too. `arg...`, `arg?`
pub fn argument(mut self, arg: String) -> Self {
self.arguments.push(arg);
self
}
pub fn render(self) -> String {
let man_num = 1;
let mut page = Roff::new(&self.name, man_num);
page = description(page, &self.name, &self.description);
page = synopsis(
page,
&self.name,
&self.flags,
&self.options,
&self.arguments,
);
page = flags(page, &self.flags);
page = options(page, &self.options);
page = environment(page, &self.environment);
page = exit_status(page);
page = authors(page, &self.authors);
page.render()
}
}
/// Create a `NAME` section.
///
/// ## Formatting
/// ```txt
/// NAME
/// mycmd - brief description of the application
/// ```
#[inline]
pub fn description(page: Roff, name: &str, desc: &Option<String>) -> Roff {
let desc = match desc {
Some(ref desc) => format!("{} - {}", name, desc),
None => name.to_owned(),
};
page.section("NAME", &[desc])
}
/// Create a `SYNOPSIS` section.
pub fn synopsis(
page: Roff,
name: &str,
flags: &[Flag],
options: &[Opt],
args: &[String],
) -> Roff {
let flags = match flags.len() {
0 => "".into(),
_ => " [FLAGS]".into(),
};
let options = match options.len() {
0 => "".into(),
_ => " [OPTIONS]".into(),
};
let mut msg = vec![];
msg.push(bold(name));
msg.push(flags);
msg.push(options);
for arg in args {
msg.push(format!(" {}", arg));
}
page.section("SYNOPSIS", &msg)
}
/// Create a `AUTHOR` or `AUTHORS` section.
///
/// ## Formatting
/// ```txt
/// AUTHORS
/// Alice Person <alice@person.com>
/// Bob Human <bob@human.com>
/// ```
#[inline]
pub fn authors(page: Roff, authors: &[Author]) -> Roff {
let title = match authors.len() {
0 => return page,
1 => "AUTHOR",
_ => "AUTHORS",
};
let last = authors.len() - 1;
let mut auth_values = vec![];
auth_values.push(init_list());
for (index, author) in authors.iter().enumerate() {
auth_values.push(author.name.to_owned());
if let Some(ref email) = author.email {
auth_values.push(format!(" <{}>", email))
};
if index != last {
auth_values.push(format!("\n"));
}
}
page.section(title, &auth_values)
}
/// Create a `FLAGS` section.
///
/// ## Formatting
/// ```txt
/// FLAGS
/// ```
pub fn flags(page: Roff, flags: &[Flag]) -> Roff {
if flags.is_empty() {
return page;
}
let last = flags.len() - 1;
let mut arr: Vec<String> = vec![];
for (index, flag) in flags.iter().enumerate() {
let mut args: Vec<String> = vec![];
if let Some(ref short) = flag.short {
args.push(bold(&short));
}
if let Some(ref long) = flag.long {
if !args.is_empty() {
args.push(", ".to_string());
}
args.push(bold(&long));
}
let desc = match flag.description {
Some(ref desc) => desc.to_string(),
None => "".to_string(),
};
arr.push(list(&args, &[desc]));
if index != last {
arr.push(format!("\n\n"));
}
}
page.section("FLAGS", &arr)
}
/// Create a `OPTIONS` section.
///
/// ## Formatting
/// ```txt
/// OPTIONS
/// ```
pub fn options(page: Roff, options: &[Opt]) -> Roff {
if options.is_empty() {
return page;
}
let last = options.len() - 1;
let mut arr: Vec<String> = vec![];
for (index, opt) in options.iter().enumerate() {
let mut args: Vec<String> = vec![];
if let Some(ref short) = opt.short {
args.push(bold(&short));
}
if let Some(ref long) = opt.long {
if !args.is_empty() {
args.push(", ".to_string());
}
args.push(bold(&long));
}
args.push("=".into());
args.push(italic(&opt.argument));
if let Some(ref default) = opt.default {
if !args.is_empty() {
args.push(" ".to_string());
}
args.push("[".into());
args.push("default:".into());
args.push(" ".into());
args.push(italic(&default));
args.push("]".into());
}
let desc = match opt.description {
Some(ref desc) => desc.to_string(),
None => "".to_string(),
};
arr.push(list(&args, &[desc]));
if index != last {
arr.push(format!("\n\n"));
}
}
page.section("OPTIONS", &arr)
}
/// Create a `ENVIRONMENT` section.
///
/// ## Formatting
/// ```txt
/// ENVIRONMENT
/// ```
pub fn environment(page: Roff, environment: &[Env]) -> Roff {
if environment.is_empty() {
return page;
}
let last = environment.len() - 1;
let mut arr: Vec<String> = vec![];
for (index, env) in environment.iter().enumerate() {
let mut args: Vec<String> = vec![];
args.push(bold(&env.name));
if let Some(ref default) = env.default {
if !args.is_empty() {
args.push(" ".to_string());
}
args.push("[".into());
args.push("default:".into());
args.push(" ".into());
args.push(italic(&default));
args.push("]".into());
}
let desc = match env.description {
Some(ref desc) => desc.to_string(),
None => "".to_string(),
};
arr.push(list(&args, &[desc]));
if index != last {
arr.push(format!("\n\n"));
}
}
page.section("ENVIRONMENT", &arr)
}
/// Create a `EXIT STATUS` section.
///
/// ## Implementation Note
/// This currently only returns the status code `0`, and takes no arguments. We
/// should let it take arguments.
///
/// ## Formatting
/// ```txt
/// EXIT STATUS
/// 0 Successful program execution
///
/// 1 Usage, syntax or configuration file error
///
/// 2 Optional error
/// ```
pub fn exit_status(page: Roff) -> Roff {
page.section(
"EXIT STATUS",
&[list(&[bold("0")], &["Successful program execution."])],
)
}
// NOTE(yw): This code was taken from the npm-install(1) command. The location
// on your system may vary. In all honesty I just copy-pasted this. We should
// probably port this to troff-rs at some point.
//
// ```sh
// $ less /usr/share/man/man1/npm-install.1
// ```
#[inline]
fn init_list() -> String {
format!(".P\n.RS 2\n.nf\n")
}