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Propagate parsing errors

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This somehow resolved another error as well, where the toml parser
reported an error for the parsed file, despite beeing one in the file.

I don't know how this commit fixed this, but it scares the shit out of
me.
This commit is contained in:
Matthias Beyer 2017-06-20 20:13:36 +02:00
parent 801622ecf2
commit 2790042f6f
1 changed files with 16 additions and 13 deletions
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29
libimagrt/src/configuration.rs
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@ -23,6 +23,9 @@ use std::ops::Deref;
use toml::Value;
use error::RuntimeErrorKind as REK;
use libimagerror::into::IntoError;
generate_error_module!(
generate_error_types!(ConfigError, ConfigErrorKind,
TOMLParserError => "TOML Parsing error",
@ -221,14 +224,12 @@ fn fetch_config(rtp: &PathBuf) -> Result<Value> {
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;
use self::error::MapErrInto;
let variants = vec!["config", "config.toml", "imagrc", "imagrc.toml"];
let modifier = |base: &PathBuf, v: &'static str| {
@ -250,6 +251,7 @@ fn fetch_config(rtp: &PathBuf) -> Result<Value> {
.flatten()
.filter(|path| path.exists() && path.is_file())
.map(|path| {
debug!("Reading {:?}", path);
let content = {
let mut s = String::new();
let f = File::open(path);
@ -261,17 +263,18 @@ fn fetch_config(rtp: &PathBuf) -> Result<Value> {
s
};
match ::toml::de::from_str(&content[..]) {
Ok(res) => res,
Err(e) => {
write!(stderr(), "Config file parser error:").ok();
trace_error(&e);
None
}
}
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)
})
.filter(|loaded| loaded.is_some())
.nth(0)
.filter_map(|x| x)
.filter(|loaded| loaded.is_ok())
.map(|inner| Value::Table(inner.unwrap()))
.nth(0)
.ok_or(ConfigErrorKind::NoConfigFileFound.into())
}