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
|
#[cfg(all(feature = "color", not(target_os = "windows")))]
use ansi_term::ANSIString;
#[cfg(all(feature = "color", not(target_os = "windows")))]
use ansi_term::Colour::{Green, Red, Yellow};
#[cfg(feature = "color")]
use atty;
use std::fmt;
use std::env;
#[doc(hidden)]
#[derive(Debug, Copy, Clone, PartialEq)]
pub enum ColorWhen {
Auto,
Always,
Never,
}
#[cfg(feature = "color")]
pub fn is_a_tty(stderr: bool) -> bool {
debugln!("is_a_tty: stderr={:?}", stderr);
let stream = if stderr {
atty::Stream::Stderr
} else {
atty::Stream::Stdout
};
atty::is(stream)
}
#[cfg(not(feature = "color"))]
pub fn is_a_tty(_: bool) -> bool {
debugln!("is_a_tty;");
false
}
pub fn is_term_dumb() -> bool { env::var("TERM").ok() == Some(String::from("dumb")) }
#[doc(hidden)]
pub struct ColorizerOption {
pub use_stderr: bool,
pub when: ColorWhen,
}
#[doc(hidden)]
pub struct Colorizer {
when: ColorWhen,
}
macro_rules! color {
($_self:ident, $c:ident, $m:expr) => {
match $_self.when {
ColorWhen::Auto => Format::$c($m),
ColorWhen::Always => Format::$c($m),
ColorWhen::Never => Format::None($m),
}
};
}
impl Colorizer {
pub fn new(option: ColorizerOption) -> Colorizer {
let is_a_tty = is_a_tty(option.use_stderr);
let is_term_dumb = is_term_dumb();
Colorizer {
when: match option.when {
ColorWhen::Auto if is_a_tty && !is_term_dumb => ColorWhen::Auto,
ColorWhen::Auto => ColorWhen::Never,
when => when,
}
}
}
pub fn good<T>(&self, msg: T) -> Format<T>
where
T: fmt::Display + AsRef<str>,
{
debugln!("Colorizer::good;");
color!(self, Good, msg)
}
pub fn warning<T>(&self, msg: T) -> Format<T>
where
T: fmt::Display + AsRef<str>,
{
debugln!("Colorizer::warning;");
color!(self, Warning, msg)
}
pub fn error<T>(&self, msg: T) -> Format<T>
where
T: fmt::Display + AsRef<str>,
{
debugln!("Colorizer::error;");
color!(self, Error, msg)
}
pub fn none<T>(&self, msg: T) -> Format<T>
where
T: fmt::Display + AsRef<str>,
{
debugln!("Colorizer::none;");
Format::None(msg)
}
}
impl Default for Colorizer {
fn default() -> Self {
Colorizer::new(ColorizerOption {
use_stderr: true,
when: ColorWhen::Auto,
})
}
}
/// Defines styles for different types of error messages. Defaults to Error=Red, Warning=Yellow,
/// and Good=Green
#[derive(Debug)]
#[doc(hidden)]
pub enum Format<T> {
/// Defines the style used for errors, defaults to Red
Error(T),
/// Defines the style used for warnings, defaults to Yellow
Warning(T),
/// Defines the style used for good values, defaults to Green
Good(T),
/// Defines no formatting style
None(T),
}
#[cfg(all(feature = "color", not(target_os = "windows")))]
impl<T: AsRef<str>> Format<T> {
fn format(&self) -> ANSIString {
match *self {
Format::Error(ref e) => Red.bold().paint(e.as_ref()),
Format::Warning(ref e) => Yellow.paint(e.as_ref()),
Format::Good(ref e) => Green.paint(e.as_ref()),
Format::None(ref e) => ANSIString::from(e.as_ref()),
}
}
}
#[cfg(any(not(feature = "color"), target_os = "windows"))]
#[cfg_attr(feature = "lints", allow(match_same_arms))]
impl<T: fmt::Display> Format<T> {
fn format(&self) -> &T {
match *self {
Format::Error(ref e) => e,
Format::Warning(ref e) => e,
Format::Good(ref e) => e,
Format::None(ref e) => e,
}
}
}
#[cfg(all(feature = "color", not(target_os = "windows")))]
impl<T: AsRef<str>> fmt::Display for Format<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{}", &self.format()) }
}
#[cfg(any(not(feature = "color"), target_os = "windows"))]
impl<T: fmt::Display> fmt::Display for Format<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{}", &self.format()) }
}
#[cfg(all(test, feature = "color", not(target_os = "windows")))]
mod test {
use ansi_term::ANSIString;
use ansi_term::Colour::{Green, Red, Yellow};
use super::Format;
#[test]
fn colored_output() {
let err = Format::Error("error");
assert_eq!(
&*format!("{}", err),
&*format!("{}", Red.bold().paint("error"))
);
let good = Format::Good("good");
assert_eq!(&*format!("{}", good), &*format!("{}", Green.paint("good")));
let warn = Format::Warning("warn");
assert_eq!(&*format!("{}", warn), &*format!("{}", Yellow.paint("warn")));
let none = Format::None("none");
assert_eq!(
&*format!("{}", none),
&*format!("{}", ANSIString::from("none"))
);
}
}
|
