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
use std::path::PathBuf;
use toml::Value;
use clap::App;
use failure::ResultExt;
use failure::Fallible as Result;
use failure::Error;
use failure::err_msg;
use libimagerror::errors::ErrorMsg as EM;
pub fn fetch_config(searchpath: &PathBuf) -> Result<Option<Value>> {
use std::env;
use std::fs::File;
use std::io::Read;
use std::io::Write;
use std::io::stderr;
use libimagutil::variants::generate_variants as gen_vars;
use libimagerror::trace::trace_error;
let variants : Vec<&'static str> = vec!["config", "config.toml", "imagrc", "imagrc.toml"];
let modifier = |base: &PathBuf, v: &&str| {
let mut base = base.clone();
base.push(String::from(*v));
base
};
let vals = vec![
vec![searchpath.clone()],
gen_vars(searchpath, variants.iter(), &modifier),
env::var("HOME")
.map(|home| gen_vars(&PathBuf::from(home), variants.iter(), &modifier))
.unwrap_or_else(|_| vec![]),
xdg_basedir::get_data_home()
.map(|data_dir| gen_vars(&data_dir, variants.iter(), &modifier))
.unwrap_or_else(|_| vec![]),
];
let config = vals
.iter()
.flatten()
.filter(|path| path.exists() && path.is_file())
.filter_map(|path| {
let content = {
let f = File::open(path);
if f.is_err() {
let _ = write!(stderr(), "Error opening file: {:?}", f);
return None
}
let mut f = f.unwrap();
let mut s = String::new();
f.read_to_string(&mut s).ok();
s
};
::toml::de::from_str::<::toml::Value>(&content[..])
.map(Some)
.unwrap_or_else(|e| {
let line_col = e
.line_col()
.map(|(line, col)| format!("Line {}, Column {}", line, col))
.unwrap_or_else(|| String::from("Line unknown, Column unknown"));
let _ = write!(stderr(), "Config file parser error at {}", line_col);
let e = Error::from(EM::TomlDeserError);
trace_error(&e);
None
})
})
.nth(0);
Ok(config)
}
pub fn override_config(val: &mut Value, v: Vec<String>) -> Result<()> {
use libimagutil::key_value_split::*;
use toml_query::read::TomlValueReadExt;
v.into_iter()
.map(|s| { debug!("Trying to process '{}'", s); s })
.filter_map(|s| s.into_kv().map(Into::into).or_else(|| {
warn!("Could split at '=' - will be ignore override");
None
}))
.map(|(k, v)| {
let value = val.read_mut(&k)
.context(EM::TomlQueryError)?
.ok_or_else(|| err_msg("No config value there, cannot override."))?;
let new_value = into_value(value, v)
.ok_or_else(|| err_msg("Config override type not matching"))?;
info!("Successfully overridden: {} = {}", k, new_value);
*value = new_value;
Ok(())
})
.map(|elem: Result<()>| elem.context(err_msg("Config override error")).map_err(Error::from))
.collect::<Result<()>>()
}
fn into_value(value: &Value, s: String) -> Option<Value> {
use std::str::FromStr;
match *value {
Value::String(_) => Some(Value::String(s)),
Value::Integer(_) => FromStr::from_str(&s[..]).ok().map(Value::Integer),
Value::Float(_) => FromStr::from_str(&s[..]).ok().map(Value::Float),
Value::Boolean(_) => {
if s == "true" { Some(Value::Boolean(true)) }
else if s == "false" { Some(Value::Boolean(false)) }
else { None }
}
Value::Datetime(_) => Value::try_from(s).ok(),
_ => None,
}
}
pub trait InternalConfiguration {
fn enable_logging(&self) -> bool {
true
}
fn use_inmemory_fs(&self) -> bool {
false
}
}
impl<'a> InternalConfiguration for App<'a, 'a> {}