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// `error_chain!` can recurse deeply
#![recursion_limit = "1024"]
mod app;
mod assets;
mod clap_app;
mod config;
mod directories;
use std::collections::HashSet;
use std::ffi::OsStr;
use std::io;
use std::io::Write;
use std::path::Path;
use std::process;
use ansi_term::Colour::Green;
use ansi_term::Style;
use crate::{app::App, config::{config_file, generate_config_file}};
use assets::{assets_from_cache_or_binary, cache_dir, clear_assets, config_dir};
use bat::Controller;
use directories::PROJECT_DIRS;
use bat::{
config::{Config, InputFile, StyleComponent, StyleComponents},
errors::*,
HighlightingAssets,
};
fn run_cache_subcommand(matches: &clap::ArgMatches) -> Result<()> {
if matches.is_present("build") {
let source_dir = matches
.value_of("source")
.map(Path::new)
.unwrap_or_else(|| PROJECT_DIRS.config_dir());
let target_dir = matches
.value_of("target")
.map(Path::new)
.unwrap_or_else(|| PROJECT_DIRS.cache_dir());
let blank = matches.is_present("blank");
let assets = HighlightingAssets::from_files(source_dir, !blank)?;
assets.save_to_cache(target_dir)?;
} else if matches.is_present("clear") {
clear_assets();
}
Ok(())
}
pub fn list_languages(config: &Config) -> Result<()> {
let assets = assets_from_cache_or_binary();
let mut languages = assets
.syntaxes()
.iter()
.filter(|syntax| !syntax.hidden && !syntax.file_extensions.is_empty())
.collect::<Vec<_>>();
languages.sort_by_key(|lang| lang.name.to_uppercase());
let stdout = io::stdout();
let mut stdout = stdout.lock();
if config.loop_through {
for lang in languages {
write!(stdout, "{}:{}\n", lang.name, lang.file_extensions.join(","))?;
}
} else {
let longest = languages
.iter()
.map(|syntax| syntax.name.len())
.max()
.unwrap_or(32); // Fallback width if they have no language definitions.
let comma_separator = ", ";
let separator = " ";
// Line-wrapping for the possible file extension overflow.
let desired_width = config.term_width - longest - separator.len();
let style = if config.colored_output {
Green.normal()
} else {
Style::default()
};
for lang in languages {
write!(stdout, "{:width$}{}", lang.name, separator, width = longest)?;
// Number of characters on this line so far, wrap before `desired_width`
let mut num_chars = 0;
let mut extension = lang.file_extensions.iter().peekable();
while let Some(word) = extension.next() {
// If we can't fit this word in, then create a line break and align it in.
let new_chars = word.len() + comma_separator.len();
if num_chars + new_chars >= desired_width {
num_chars = 0;
write!(stdout, "\n{:width$}{}", "", separator, width = longest)?;
}
num_chars += new_chars;
write!(stdout, "{}", style.paint(&word[..]))?;
if extension.peek().is_some() {
write!(stdout, "{}", comma_separator)?;
}
}
writeln!(stdout)?;
}
}
Ok(())
}
pub fn list_themes(cfg: &Config) -> Result<()> {
let assets = assets_from_cache_or_binary();
let mut config = cfg.clone();
let mut style = HashSet::new();
style.insert(StyleComponent::Plain);
config.files = vec![InputFile::ThemePreviewFile];
config.style_components = StyleComponents(style);
let stdout = io::stdout();
let mut stdout = stdout.lock();
if config.colored_output {
for theme in assets.themes() {
writeln!(
stdout,
"Theme: {}\n",
Style::new().bold().paint(theme.to_string())
)?;
config.theme = theme.to_string();
let _controller = Controller::new(&config, &assets).run();
writeln!(stdout)?;
}
} else {
for theme in assets.themes() {
writeln!(stdout, "{}", theme)?;
}
}
Ok(())
}
fn run_controller(config: &Config) -> Result<bool> {
let assets = assets_from_cache_or_binary();
let controller = Controller::new(&config, &assets);
controller.run()
}
/// Returns `Err(..)` upon fatal errors. Otherwise, returns `Ok(true)` on full success and
/// `Ok(false)` if any intermediate errors occurred (were printed).
fn run() -> Result<bool> {
let app = App::new()?;
match app.matches.subcommand() {
("cache", Some(cache_matches)) => {
// If there is a file named 'cache' in the current working directory,
// arguments for subcommand 'cache' are not mandatory.
// If there are non-zero arguments, execute the subcommand cache, else, open the file cache.
if !cache_matches.args.is_empty() {
run_cache_subcommand(cache_matches)?;
Ok(true)
} else {
let mut config = app.config()?;
config.files = vec![InputFile::Ordinary(OsStr::new("cache"))];
run_controller(&config)
}
}
_ => {
let config = app.config()?;
if app.matches.is_present("list-languages") {
list_languages(&config)?;
Ok(true)
} else if app.matches.is_present("list-themes") {
list_themes(&config)?;
Ok(true)
} else if app.matches.is_present("config-file") {
println!("{}", config_file().to_string_lossy());
Ok(true)
} else if app.matches.is_present("generate-config-file") {
generate_config_file()?;
Ok(true)
} else if app.matches.is_present("config-dir") {
writeln!(io::stdout(), "{}", config_dir())?;
Ok(true)
} else if app.matches.is_present("cache-dir") {
writeln!(io::stdout(), "{}", cache_dir())?;
Ok(true)
} else {
run_controller(&config)
}
}
}
}
fn main() {
let result = run();
match result {
Err(error) => {
default_error_handler(&error);
process::exit(1);
}
Ok(false) => {
process::exit(1);
}
Ok(true) => {
process::exit(0);
}
}
}
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