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use crate::options::{flags, vars, Vars, OptionsError};
use crate::options::parser::MatchedFlags;
use crate::theme::{Options, UseColours, ColourScale, Definitions};
impl Options {
pub fn deduce<V: Vars>(matches: &MatchedFlags<'_>, vars: &V) -> Result<Self, OptionsError> {
let use_colours = UseColours::deduce(matches)?;
let colour_scale = ColourScale::deduce(matches)?;
let definitions = if use_colours == UseColours::Never {
Definitions::default()
}
else {
Definitions::deduce(vars)
};
Ok(Self { use_colours, colour_scale, definitions })
}
}
impl UseColours {
fn deduce(matches: &MatchedFlags<'_>) -> Result<Self, OptionsError> {
let word = match matches.get_where(|f| f.matches(&flags::COLOR) || f.matches(&flags::COLOUR))? {
Some(w) => w,
None => return Ok(Self::Automatic),
};
if word == "always" {
Ok(Self::Always)
}
else if word == "auto" || word == "automatic" {
Ok(Self::Automatic)
}
else if word == "never" {
Ok(Self::Never)
}
else {
Err(OptionsError::BadArgument(&flags::COLOR, word.into()))
}
}
}
impl ColourScale {
fn deduce(matches: &MatchedFlags<'_>) -> Result<Self, OptionsError> {
if matches.has_where(|f| f.matches(&flags::COLOR_SCALE) || f.matches(&flags::COLOUR_SCALE))?.is_some() {
Ok(Self::Gradient)
}
else {
Ok(Self::Fixed)
}
}
}
impl Definitions {
fn deduce<V: Vars>(vars: &V) -> Self {
let ls = vars.get(vars::LS_COLORS) .map(|e| e.to_string_lossy().to_string());
let exa = vars.get(vars::EXA_COLORS).map(|e| e.to_string_lossy().to_string());
Self { ls, exa }
}
}
#[cfg(test)]
mod terminal_test {
use super::*;
use std::ffi::OsString;
use crate::options::flags;
use crate::options::parser::{Flag, Arg};
use crate::options::test::parse_for_test;
use crate::options::test::Strictnesses::*;
static TEST_ARGS: &[&Arg] = &[ &flags::COLOR, &flags::COLOUR,
&flags::COLOR_SCALE, &flags::COLOUR_SCALE, ];
macro_rules! test {
($name:ident: $type:ident <- $inputs:expr; $stricts:expr => $result:expr) => {
#[test]
fn $name() {
for result in parse_for_test($inputs.as_ref(), TEST_ARGS, $stricts, |mf| $type::deduce(mf)) {
assert_eq!(result, $result);
}
}
};
($name:ident: $type:ident <- $inputs:expr; $stricts:expr => err $result:expr) => {
#[test]
fn $name() {
for result in parse_for_test($inputs.as_ref(), TEST_ARGS, $stricts, |mf| $type::deduce(mf)) {
assert_eq!(result.unwrap_err(), $result);
}
}
};
}
struct MockVars {
ls: &'static str,
exa: &'static str,
}
// Test impl that just returns the value it has.
impl Vars for MockVars {
fn get(&self, name: &'static str) -> Option<OsString> {
if name == vars::LS_COLORS && ! self.ls.is_empty() {
Some(OsString::from(self.ls.clone()))
}
else if name == vars::EXA_COLORS && ! self.exa.is_empty() {
Some(OsString::from(self.exa.clone()))
}
else {
None
}
}
}
// Default
test!(empty: UseColours <- []; Both => Ok(UseColours::Automatic));
// --colour
test!(u_always: UseColours <- ["--colour=always"]; Both => Ok(UseColours::Always));
test!(u_auto: UseColours <- ["--colour", "auto"]; Both => Ok(UseColours::Automatic));
test!(u_never: UseColours <- ["--colour=never"]; Both => Ok(UseColours::Never));
// --color
test!(no_u_always: UseColours <- ["--color", "always"]; Both => Ok(UseColours::Always));
test!(no_u_auto: UseColours <- ["--color=auto"]; Both => Ok(UseColours::Automatic));
test!(no_u_never: UseColours <- ["--color", "never"]; Both => Ok(UseColours::Never));
// Errors
test!(no_u_error: UseColours <- ["--color=upstream"]; Both => err OptionsError::BadArgument(&flags::COLOR, OsString::from("upstream"))); // the error is for --color
test!(u_error: UseColours <- ["--colour=lovers"]; Both => err OptionsError::BadArgument(&flags::COLOR, OsString::from("lovers"))); // and so is this one!
// Overriding
test!(overridden_1: UseColours <- ["--colour=auto", "--colour=never"]; Last => Ok(UseColours::Never));
test!(overridden_2: UseColours <- ["--color=auto", "--colour=never"]; Last => Ok(UseColours::Never));
test!(overridden_3: UseColours <- ["--colour=auto", "--color=never"]; Last => Ok(UseColours::Never));
test!(overridden_4: UseColours <- ["--color=auto", "--color=never"]; Last => Ok(UseColours::Never));
test!(overridden_5: UseColours <- ["--colour=auto", "--colour=never"]; Complain => err OptionsError::Duplicate(Flag::Long("colour"), Flag::Long("colour")));
test!(overridden_6: UseColours <- ["--color=auto", "--colour=never"]; Complain => err OptionsError::Duplicate(Flag::Long("color"), Flag::Long("colour")));
test!(overridden_7: UseColours <- ["--colour=auto", "--color=never"]; Complain => err OptionsError::Duplicate(Flag::Long("colour"), Flag::Long("color")));
test!(overridden_8: UseColours <- ["--color=auto", "--color=never"]; Complain => err OptionsError::Duplicate(Flag::Long("color"), Flag::Long("color")));
test!(scale_1: ColourScale <- ["--color-scale", "--colour-scale"]; Last => Ok(ColourScale::Gradient));
test!(scale_2: ColourScale <- ["--color-scale", ]; Last => Ok(ColourScale::Gradient));
test!(scale_3: ColourScale <- [ "--colour-scale"]; Last => Ok(ColourScale::Gradient));
test!(scale_4: ColourScale <- [ ]; Last => Ok(ColourScale::Fixed));
test!(scale_5: ColourScale <- ["--color-scale", "--colour-scale"]; Complain => err OptionsError::Duplicate(Flag::Long("color-scale"), Flag::Long("colour-scale")));
test!(scale_6: ColourScale <- ["--color-scale", ]; Complain => Ok(ColourScale::Gradient));
test!(scale_7: ColourScale <- [ "--colour-scale"]; Complain => Ok(ColourScale::Gradient));
test!(scale_8: ColourScale <- [ ]; Complain => Ok(ColourScale::Fixed));
}
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