/
recipe.rs
293 lines (262 loc) · 8.54 KB
/
recipe.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
use common::*;
use std::path::PathBuf;
use std::process::{ExitStatus, Command, Stdio};
use platform::{Platform, PlatformInterface};
/// Return a `RuntimeError::Signal` if the process was terminated by a signal,
/// otherwise return an `RuntimeError::UnknownFailure`
fn error_from_signal(
recipe: &str,
line_number: Option<usize>,
exit_status: ExitStatus
) -> RuntimeError {
match Platform::signal_from_exit_status(exit_status) {
Some(signal) => RuntimeError::Signal{recipe, line_number, signal},
None => RuntimeError::Unknown{recipe, line_number},
}
}
#[derive(PartialEq, Debug)]
pub struct Recipe<'a> {
pub dependencies: Vec<&'a str>,
pub dependency_tokens: Vec<Token<'a>>,
pub doc: Option<&'a str>,
pub line_number: usize,
pub lines: Vec<Vec<Fragment<'a>>>,
pub name: &'a str,
pub parameters: Vec<Parameter<'a>>,
pub private: bool,
pub quiet: bool,
pub shebang: bool,
}
impl<'a> Recipe<'a> {
pub fn argument_range(&self) -> Range<usize> {
self.min_arguments()..self.max_arguments() + 1
}
pub fn min_arguments(&self) -> usize {
self.parameters.iter().filter(|p| !p.default.is_some()).count()
}
pub fn max_arguments(&self) -> usize {
if self.parameters.iter().any(|p| p.variadic) {
usize::MAX - 1
} else {
self.parameters.len()
}
}
pub fn run(
&self,
invocation_directory: &Result<PathBuf, String>,
arguments: &[&'a str],
scope: &Map<&'a str, String>,
dotenv: &Map<String, String>,
exports: &Set<&'a str>,
configuration: &Configuration,
) -> RunResult<'a, ()> {
if configuration.verbose {
let color = configuration.color.stderr().banner();
eprintln!("{}===> Running recipe `{}`...{}", color.prefix(), self.name, color.suffix());
}
let mut argument_map = Map::new();
let mut rest = arguments;
for parameter in &self.parameters {
let value = if rest.is_empty() {
match parameter.default {
Some(ref default) => Cow::Borrowed(default.as_str()),
None => return Err(RuntimeError::Internal{
message: "missing parameter without default".to_string()
}),
}
} else if parameter.variadic {
let value = Cow::Owned(rest.to_vec().join(" "));
rest = &[];
value
} else {
let value = Cow::Borrowed(rest[0]);
rest = &rest[1..];
value
};
argument_map.insert(parameter.name, value);
}
let mut evaluator = AssignmentEvaluator {
assignments: &empty(),
invocation_directory,
dry_run: configuration.dry_run,
evaluated: empty(),
overrides: &empty(),
quiet: configuration.quiet,
shell: configuration.shell,
dotenv,
exports,
scope,
};
if self.shebang {
let mut evaluated_lines = vec![];
for line in &self.lines {
evaluated_lines.push(evaluator.evaluate_line(line, &argument_map)?);
}
if configuration.dry_run || self.quiet {
for line in &evaluated_lines {
eprintln!("{}", line);
}
}
if configuration.dry_run {
return Ok(());
}
let tmp = TempDir::new("just")
.map_err(|error| RuntimeError::TmpdirIoError{recipe: self.name, io_error: error})?;
let mut path = tmp.path().to_path_buf();
path.push(self.name);
{
let mut f = fs::File::create(&path)
.map_err(|error| RuntimeError::TmpdirIoError{recipe: self.name, io_error: error})?;
let mut text = String::new();
// add the shebang
text += &evaluated_lines[0];
text += "\n";
// add blank lines so that lines in the generated script
// have the same line number as the corresponding lines
// in the justfile
for _ in 1..(self.line_number + 2) {
text += "\n"
}
for line in &evaluated_lines[1..] {
text += line;
text += "\n";
}
f.write_all(text.as_bytes())
.map_err(|error| RuntimeError::TmpdirIoError{recipe: self.name, io_error: error})?;
}
// make the script executable
Platform::set_execute_permission(&path)
.map_err(|error| RuntimeError::TmpdirIoError{recipe: self.name, io_error: error})?;
let shebang_line = evaluated_lines.first()
.ok_or_else(|| RuntimeError::Internal {
message: "evaluated_lines was empty".to_string()
})?;
let Shebang{interpreter, argument} = Shebang::new(shebang_line)
.ok_or_else(|| RuntimeError::Internal {
message: format!("bad shebang line: {}", shebang_line)
})?;
// create a command to run the script
let mut command = Platform::make_shebang_command(&path, interpreter, argument)
.map_err(|output_error| RuntimeError::Cygpath{recipe: self.name, output_error})?;
command.export_environment_variables(scope, dotenv, exports)?;
// run it!
match command.status() {
Ok(exit_status) => if let Some(code) = exit_status.code() {
if code != 0 {
return Err(RuntimeError::Code{recipe: self.name, line_number: None, code})
}
} else {
return Err(error_from_signal(self.name, None, exit_status))
},
Err(io_error) => return Err(RuntimeError::Shebang {
recipe: self.name,
command: interpreter.to_string(),
argument: argument.map(String::from),
io_error,
})
};
} else {
let mut lines = self.lines.iter().peekable();
let mut line_number = self.line_number + 1;
loop {
if lines.peek().is_none() {
break;
}
let mut evaluated = String::new();
loop {
if lines.peek().is_none() {
break;
}
let line = lines.next().unwrap();
line_number += 1;
evaluated += &evaluator.evaluate_line(line, &argument_map)?;
if line.last().map(Fragment::continuation).unwrap_or(false) {
evaluated.pop();
} else {
break;
}
}
let mut command = evaluated.as_str();
let quiet_command = command.starts_with('@');
if quiet_command {
command = &command[1..];
}
if command == "" {
continue;
}
if configuration.dry_run ||
configuration.verbose ||
!((quiet_command ^ self.quiet) ||
configuration.quiet
) {
let color = if configuration.highlight {
configuration.color.command()
} else {
configuration.color
};
eprintln!("{}", color.stderr().paint(command));
}
if configuration.dry_run {
continue;
}
let mut cmd = Command::new(configuration.shell);
cmd.arg("-cu").arg(command);
if configuration.quiet {
cmd.stderr(Stdio::null());
cmd.stdout(Stdio::null());
}
cmd.export_environment_variables(scope, dotenv, exports)?;
match cmd.status() {
Ok(exit_status) => if let Some(code) = exit_status.code() {
if code != 0 {
return Err(RuntimeError::Code{
recipe: self.name, line_number: Some(line_number), code,
});
}
} else {
return Err(error_from_signal(self.name, Some(line_number), exit_status));
},
Err(io_error) => return Err(RuntimeError::IoError{
recipe: self.name,
io_error,
}),
};
}
}
Ok(())
}
}
impl<'a> Display for Recipe<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
if let Some(doc) = self.doc {
writeln!(f, "# {}", doc)?;
}
write!(f, "{}", self.name)?;
for parameter in &self.parameters {
write!(f, " {}", parameter)?;
}
write!(f, ":")?;
for dependency in &self.dependencies {
write!(f, " {}", dependency)?;
}
for (i, pieces) in self.lines.iter().enumerate() {
if i == 0 {
writeln!(f, "")?;
}
for (j, piece) in pieces.iter().enumerate() {
if j == 0 {
write!(f, " ")?;
}
match *piece {
Fragment::Text{ref text} => write!(f, "{}", text.lexeme)?,
Fragment::Expression{ref expression, ..} =>
write!(f, "{}{}{}", "{{", expression, "}}")?,
}
}
if i + 1 < self.lines.len() {
write!(f, "\n")?;
}
}
Ok(())
}
}