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input.rs
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input.rs
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use std::{collections::BTreeMap, error::Error, str::FromStr};
use tokei::{Language, LanguageType, Languages};
type LanguageMap = BTreeMap<LanguageType, Language>;
macro_rules! supported_formats {
($(
($name:ident, $feature:expr, $variant:ident [$($krate:ident),+]) =>
$parse_kode:expr,
$print_kode:expr,
)+) => (
$( // for each format
$( // for each required krate
#[cfg(feature = $feature)] extern crate $krate;
)+
)+
/// Supported serialization formats.
///
/// To enable all formats compile with the `all` feature.
#[derive(Debug)]
pub enum Format {
$(
#[cfg(feature = $feature)] $variant
),+
// TODO: Allow adding format at runtime when used as a lib?
}
impl Format {
pub fn supported() -> &'static [&'static str] {
&[
$(
#[cfg(feature = $feature)] stringify!($name)
),+
]
}
pub fn all() -> &'static [&'static str] {
&[
$( stringify!($name) ),+
]
}
pub fn all_feature_names() -> &'static [&'static str] {
&[
$( $feature ),+
]
}
pub fn not_supported() -> &'static [&'static str] {
&[
$(
#[cfg(not(feature = $feature))] stringify!($name)
),+
]
}
pub fn parse(input: &str) -> Option<LanguageMap> {
if input.is_empty() {
return None
}
$(
// attributes are not yet allowed on `if` expressions
#[cfg(feature = $feature)]
{
let parse = &{ $parse_kode };
if let Ok(result) = parse(input) {
return Some(result)
}
}
)+
// Didn't match any of the compiled serialization formats
None
}
pub fn print(&self, _languages: Languages) -> Result<String, Box<dyn Error>> {
match *self {
$(
#[cfg(feature = $feature)] Format::$variant => {
let print= &{ $print_kode };
Ok(print(&_languages)?)
}
),+
}
}
}
impl FromStr for Format {
type Err = String;
fn from_str(format: &str) -> Result<Self, Self::Err> {
match format {
$(
stringify!($name) => {
#[cfg(feature = $feature)]
return Ok(Format::$variant);
#[cfg(not(feature = $feature))]
return Err(format!(
"This version of tokei was compiled without \
any '{format}' serialization support, to enable serialization, \
reinstall tokei with the features flag.
cargo install tokei --features {feature}
If you want to enable all supported serialization formats, you can use the 'all' feature.
cargo install tokei --features all\n",
format = stringify!($name),
feature = $feature)
);
}
),+
format => Err(format!("{:?} is not a supported serialization format", format)),
}
}
}
)
}
// The ordering of these determines the attempted order when parsing.
supported_formats!(
(cbor, "cbor", Cbor [serde_cbor, hex]) =>
|input| {
hex::FromHex::from_hex(input)
.map_err(|e: hex::FromHexError| <Box<dyn Error>>::from(e))
.and_then(|hex: Vec<_>| Ok(serde_cbor::from_slice(&hex)?))
},
|languages| serde_cbor::to_vec(&languages).map(hex::encode),
(json, "json", Json [serde_json]) =>
serde_json::from_str,
serde_json::to_string,
(yaml, "yaml", Yaml [serde_yaml]) =>
serde_yaml::from_str,
serde_yaml::to_string,
);
pub fn add_input(input: &str, languages: &mut Languages) -> bool {
use std::fs::File;
use std::io::Read;
let map = match File::open(input) {
Ok(mut file) => {
let contents = {
let mut contents = String::new();
file.read_to_string(&mut contents)
.expect("Couldn't read file");
contents
};
convert_input(&contents)
}
Err(_) => {
if input == "stdin" {
let mut stdin = ::std::io::stdin();
let mut buffer = String::new();
let _ = stdin.read_to_string(&mut buffer);
convert_input(&buffer)
} else {
convert_input(input)
}
}
};
if let Some(map) = map {
*languages += map;
true
} else {
false
}
}
fn convert_input(contents: &str) -> Option<LanguageMap> {
self::Format::parse(&contents)
}