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#[macro_use]
extern crate error_chain;
mod align;
mod bat;
mod cli;
mod config;
mod delta;
mod draw;
mod edits;
mod env;
mod paint;
mod parse;
mod style;
use std::io::{self, BufRead, ErrorKind, Read, Write};
use std::process;
use ansi_term;
use atty;
use structopt::StructOpt;
use syntect::highlighting::{Color, FontStyle, Style};
use crate::bat::assets::{list_languages, HighlightingAssets};
use crate::bat::output::{OutputType, PagingMode};
use crate::delta::delta;
mod errors {
error_chain! {
foreign_links {
Io(::std::io::Error);
SyntectError(::syntect::LoadingError);
ParseIntError(::std::num::ParseIntError);
}
}
}
fn main() -> std::io::Result<()> {
let opt = cli::Opt::from_args();
let assets = HighlightingAssets::new();
if opt.list_languages {
list_languages()?;
process::exit(0);
} else if opt.list_theme_names {
list_theme_names()?;
process::exit(0);
} else if opt.list_themes {
list_themes(&assets)?;
process::exit(0);
}
let config = cli::process_command_line_arguments(&assets, &opt);
if opt.show_background_colors {
show_background_colors(&config);
process::exit(0);
}
let mut output_type = OutputType::from_mode(PagingMode::QuitIfOneScreen, None).unwrap();
let mut writer = output_type.handle().unwrap();
if let Err(error) = delta(
io::stdin().lock().lines().map(|l| l.unwrap()),
&config,
&assets,
&mut writer,
) {
match error.kind() {
ErrorKind::BrokenPipe => process::exit(0),
_ => eprintln!("{}", error),
}
};
Ok(())
}
fn show_background_colors(config: &config::Config) {
println!(
"delta \
--minus-color=\"{minus_color}\" \
--minus-emph-color=\"{minus_emph_color}\" \
--plus-color=\"{plus_color}\" \
--plus-emph-color=\"{plus_emph_color}\"",
minus_color = color_to_hex(config.minus_style_modifier.background.unwrap()),
minus_emph_color = color_to_hex(config.minus_emph_style_modifier.background.unwrap()),
plus_color = color_to_hex(config.plus_style_modifier.background.unwrap()),
plus_emph_color = color_to_hex(config.plus_emph_style_modifier.background.unwrap()),
)
}
fn color_to_hex(color: Color) -> String {
let mut string = String::new();
let style = Style {
foreground: style::NO_COLOR,
background: color,
font_style: FontStyle::empty(),
};
paint::paint_text(
&format!("#{:02x?}{:02x?}{:02x?}", color.r, color.g, color.b),
style,
&mut string,
);
string.push_str("\x1b[0m"); // reset
string
}
fn list_themes(assets: &HighlightingAssets) -> std::io::Result<()> {
let opt = cli::Opt::from_args();
let mut input = String::new();
if atty::is(atty::Stream::Stdin) {
input = "\
diff --git a/example.rs b/example.rs
index f38589a..0f1bb83 100644
--- a/example.rs
+++ b/example.rs
@@ -1,5 +1,5 @@
-// Output the square of a number.
-fn print_square(num: f64) {
- let result = f64::powf(num, 2.0);
- println!(\"The square of {:.2} is {:.2}.\", num, result);
+// Output the cube of a number.
+fn print_cube(num: f64) {
+ let result = f64::powf(num, 3.0);
+ println!(\"The cube of {:.2} is {:.2}.\", num, result);
}"
.to_string()
} else {
io::stdin().read_to_string(&mut input)?;
}
let stdout = io::stdout();
let mut stdout = stdout.lock();
let style = ansi_term::Style::new().bold();
for (theme, _) in assets.theme_set.themes.iter() {
if opt.light && !style::is_light_theme(theme) || opt.dark && style::is_light_theme(theme) {
continue;
}
writeln!(stdout, "\nTheme: {}\n", style.paint(theme))?;
let new_opt = cli::Opt {
theme: Some(theme.to_string()),
..opt.clone()
};
let config = cli::process_command_line_arguments(&assets, &new_opt);
let mut output_type = OutputType::from_mode(PagingMode::QuitIfOneScreen, None).unwrap();
let mut writer = output_type.handle().unwrap();
if let Err(error) = delta(
input.split('\n').map(String::from),
&config,
&assets,
&mut writer,
) {
match error.kind() {
ErrorKind::BrokenPipe => process::exit(0),
_ => eprintln!("{}", error),
}
};
}
Ok(())
}
pub fn list_theme_names() -> std::io::Result<()> {
let assets = HighlightingAssets::new();
let themes = &assets.theme_set.themes;
let stdout = io::stdout();
let mut stdout = stdout.lock();
writeln!(stdout, "Light themes:")?;
for (theme, _) in themes.iter() {
if style::is_light_theme(theme) {
writeln!(stdout, " {}", theme)?;
}
}
writeln!(stdout, "Dark themes:")?;
for (theme, _) in themes.iter() {
if !style::is_light_theme(theme) {
writeln!(stdout, " {}", theme)?;
}
}
Ok(())
}
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