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Move fetch_config into GetConfiguration trait

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Robert Ignat 2017-06-06 22:30:49 +02:00 committed by Matthias Beyer
parent 60e3038874
commit 7375f3c6ac
1 changed files with 61 additions and 64 deletions
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125
libimagrt/src/configuration.rs
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@ -211,72 +211,69 @@ fn get_editor_opts(v: &Value) -> String {
}
}
/// Helper to fetch the config file
///
/// Tests several variants for the config file path and uses the first one which works.
fn fetch_config(rtp: &PathBuf) -> Result<Value> {
use std::env;
use std::fs::File;
use std::io::Read;
use xdg_basedir;
use itertools::Itertools;
use libimagutil::variants::generate_variants as gen_vars;
use self::error::MapErrInto;
let variants = vec!["config", "config.toml", "imagrc", "imagrc.toml"];
let modifier = |base: &PathBuf, v: &'static str| {
let mut base = base.clone();
base.push(String::from(v));
base
};
vec![
vec![rtp.clone()],
gen_vars(rtp.clone(), variants.clone(), &modifier),
env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
.unwrap_or(vec![]),
xdg_basedir::get_data_home().map(|data_dir| gen_vars(data_dir, variants.clone(), &modifier))
.unwrap_or(vec![]),
].iter()
.flatten()
.filter(|path| path.exists() && path.is_file())
.filter_map(|path| if path.exists() && path.is_file() {
debug!("Reading {:?}", path);
let content = {
let mut s = String::new();
let f = File::open(path);
if f.is_err() {
return None
}
let mut f = f.unwrap();
f.read_to_string(&mut s).ok();
s
};
trace!("Contents of config file: \n---\n{}\n---", content);
let toml = ::toml::de::from_str(&content[..])
.map_err_into(ConfigErrorKind::TOMLParserError)
.map_err(Box::new)
.map_err(|e| REK::Instantiate.into_error_with_cause(e));
Some(toml)
} else {
None
})
.filter(|loaded| loaded.is_ok())
.map(|inner| Value::Table(inner.unwrap()))
.nth(0)
.ok_or(ConfigErrorKind::NoConfigFileFound.into())
}
pub trait GetConfiguration {
/// Helper to fetch the config file
///
/// Default implementation tests several variants for the config file path and uses the first
/// one which works.
fn get_configuration(rtp: &PathBuf) -> Result<Configuration> {
fetch_config(rtp).map(Configuration::new)
use std::env;
use std::fs::File;
use std::io::Read;
use std::io::Write;
use std::io::stderr;
use xdg_basedir;
use itertools::Itertools;
use libimagutil::variants::generate_variants as gen_vars;
use libimagerror::trace::trace_error;
let variants = vec!["config", "config.toml", "imagrc", "imagrc.toml"];
let modifier = |base: &PathBuf, v: &'static str| {
let mut base = base.clone();
base.push(String::from(v));
base
};
vec![
vec![rtp.clone()],
gen_vars(rtp.clone(), variants.clone(), &modifier),
env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
.unwrap_or(vec![]),
xdg_basedir::get_data_home().map(|data_dir| gen_vars(data_dir, variants.clone(), &modifier))
.unwrap_or(vec![]),
].iter()
.flatten()
.filter(|path| path.exists() && path.is_file())
.map(|path| {
let content = {
let mut s = String::new();
let f = File::open(path);
if f.is_err() {
return None
}
let mut f = f.unwrap();
f.read_to_string(&mut s).ok();
s
};
match ::toml::de::from_str(&content[..]) {
Ok(res) => res,
Err(e) => {
write!(stderr(), "Config file parser error:").ok();
trace_error(&e);
None
}
}
})
.filter(|loaded| loaded.is_some())
.nth(0)
.map(|inner| Value::Table(inner.unwrap()))
.ok_or(ConfigErrorKind::NoConfigFileFound.into())
.map(Configuration::new)
}
}