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Implement SyntaxSet and ThemeSet caching

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closes #21, see #20
This commit is contained in:
sharkdp 2018-04-30 15:08:04 +02:00
parent 1ff46aaaf8
commit f81e38618c
3 changed files with 164 additions and 43 deletions
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12
Cargo.lock generated
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@ -65,10 +65,13 @@ version = "0.1.0"
dependencies = [
"ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
"atty 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
"bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"clap 2.31.2 (registry+https://github.com/rust-lang/crates.io-index)",
"console 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
"directories 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
"error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
"git2 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"syntect 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
@ -178,6 +181,14 @@ dependencies = [
"winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "directories"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "dtoa"
version = "0.4.2"
@ -838,6 +849,7 @@ dependencies = [
"checksum cmake 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)" = "56d741ea7a69e577f6d06b36b7dff4738f680593dc27a701ffa8506b73ce28bb"
"checksum console 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7649ca90478264b9686aac8d269fcb014f14c2bed7c79a7e51b9f6afd4d783eb"
"checksum curl-sys 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f3f7738d877ec81040305d5bb91976ac594f564f5e455dc02a29a23c1d00fe6f"
"checksum directories 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "52bdea76de17dee3b166076dc4eeaf1d3df65fc094918a16776c2675b79ced50"
"checksum dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "09c3753c3db574d215cba4ea76018483895d7bff25a31b49ba45db21c48e50ab"
"checksum duct 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "166298c17c5b4fe5997b962c2f22e887c7c5adc44308eb9103ce5b66af45a423"
"checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"

5
Cargo.toml
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@ -12,14 +12,17 @@ version = "0.1.0"
[dependencies]
atty = "0.2.2"
ansi_term = "0.9"
bincode = "1.0"
console = "0.6"
git2 = "0.6"
error-chain = "0.11"
directories = "0.9"
lazy_static = "1.0"
[dependencies.syntect]
version = "2"
default-features = false
features = ["parsing", "yaml-load", "dump-load", "assets"]
features = ["parsing", "yaml-load", "dump-load", "assets", "dump-create"]
[dependencies.clap]
version = "2"

190
src/main.rs
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@ -7,9 +7,13 @@ extern crate error_chain;
#[macro_use]
extern crate clap;
#[macro_use]
extern crate lazy_static;
extern crate ansi_term;
extern crate atty;
extern crate console;
extern crate directories;
extern crate git2;
extern crate syntect;
@ -17,6 +21,7 @@ mod terminal;
use std::collections::HashMap;
use std::env;
use std::fs::{self, File};
use std::io::{self, BufRead, StdoutLock, Write};
use std::path::Path;
use std::process;
@ -24,16 +29,22 @@ use std::process;
use ansi_term::Colour::{Fixed, Green, Red, White, Yellow};
use ansi_term::Style;
use atty::Stream;
use clap::{App, AppSettings, Arg, ArgMatches};
use clap::{App, AppSettings, Arg, SubCommand};
use console::Term;
use directories::ProjectDirs;
use git2::{DiffOptions, IntoCString, Repository};
use syntect::dumps::{dump_to_file, from_reader};
use syntect::easy::HighlightFile;
use syntect::highlighting::{Theme, ThemeSet};
use syntect::parsing::SyntaxSet;
use terminal::as_terminal_escaped;
lazy_static! {
static ref PROJECT_DIRS: ProjectDirs = ProjectDirs::from("", "", crate_name!());
}
mod errors {
error_chain!{
foreign_links {
@ -197,54 +208,113 @@ fn get_git_diff(filename: &str) -> Option<LineChanges> {
Some(line_changes)
}
fn run(matches: &ArgMatches) -> Result<()> {
let home_dir = env::home_dir().chain_err(|| "Could not get home directory")?;
let colorterm = env::var("COLORTERM").unwrap_or_else(|_| "".into());
let options = Options {
true_color: colorterm == "truecolor" || colorterm == "24bit",
};
let theme_dir = home_dir.join(".config").join("bat").join("themes");
let theme_set = ThemeSet::load_from_folder(theme_dir).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
"Could not load themes from ~/.config/bat/themes",
)
})?;
let theme = &theme_set.themes.get("Default").ok_or_else(|| {
io::Error::new(
io::ErrorKind::Other,
"Could not load default theme (~/.config/bat/themes/Default.tmTheme)",
)
})?;
// TODO: let mut syntax_set = SyntaxSet::load_defaults_nonewlines();
let mut syntax_set = SyntaxSet::new();
let syntax_dir = home_dir.join(".config").join("bat").join("syntax");
let _ = syntax_set.load_syntaxes(syntax_dir, false);
syntax_set.load_plain_text_syntax();
syntax_set.link_syntaxes();
if let Some(files) = matches.values_of("FILE") {
for file in files {
let line_changes = get_git_diff(&file.to_string());
print_file(&options, theme, &syntax_set, file, &line_changes)?;
}
}
Ok(())
fn is_truecolor_terminal() -> bool {
env::var("COLORTERM")
.map(|colorterm| colorterm == "truecolor" || colorterm == "24bit")
.unwrap_or(false)
}
fn main() {
struct HighlightingAssets {
pub syntax_set: SyntaxSet,
pub theme_set: ThemeSet,
}
impl HighlightingAssets {
fn from_files() -> Result<Self> {
let config_dir = PROJECT_DIRS.config_dir();
let theme_dir = config_dir.join("themes");
let theme_set = ThemeSet::load_from_folder(&theme_dir).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
format!(
"Could not load themes from '{}'",
theme_dir.to_string_lossy()
),
)
})?;
let mut syntax_set = SyntaxSet::new();
let syntax_dir = config_dir.join("syntax");
let _ = syntax_set.load_syntaxes(syntax_dir, false);
syntax_set.load_plain_text_syntax();
Ok(HighlightingAssets {
syntax_set,
theme_set,
})
}
fn save(&self) -> Result<()> {
let cache_dir = PROJECT_DIRS.cache_dir();
let theme_set_path = cache_dir.join("theme_set");
let syntax_set_path = cache_dir.join("syntax_set");
let _ = fs::create_dir(cache_dir);
dump_to_file(&self.theme_set, &theme_set_path).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
format!(
"Could not save theme set to {}",
theme_set_path.to_string_lossy()
),
)
})?;
println!("Wrote theme set to {}", theme_set_path.to_string_lossy());
dump_to_file(&self.syntax_set, &syntax_set_path).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
format!(
"Could not save syntax set to {}",
syntax_set_path.to_string_lossy()
),
)
})?;
println!("Wrote syntax set to {}", syntax_set_path.to_string_lossy());
Ok(())
}
fn from_cache() -> Result<Self> {
let cache_dir = PROJECT_DIRS.cache_dir();
let theme_set_path = cache_dir.join("theme_set");
let syntax_set_path = cache_dir.join("syntax_set");
let syntax_set_file = File::open(syntax_set_path)?;
let mut syntax_set: SyntaxSet = from_reader(syntax_set_file).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
format!("Could not load cached syntax set"),
)
})?;
syntax_set.link_syntaxes();
let theme_set_file = File::open(theme_set_path)?;
let theme_set: ThemeSet = from_reader(theme_set_file).map_err(|_| {
io::Error::new(
io::ErrorKind::Other,
format!("Could not load cached theme set"),
)
})?;
Ok(HighlightingAssets {
syntax_set,
theme_set,
})
}
}
fn run() -> Result<()> {
let clap_color_setting = if atty::is(Stream::Stdout) {
AppSettings::ColoredHelp
} else {
AppSettings::ColorNever
};
let matches = App::new(crate_name!())
let app_matches = App::new(crate_name!())
.version(crate_version!())
.setting(clap_color_setting)
.setting(AppSettings::DeriveDisplayOrder)
@ -259,11 +329,47 @@ fn main() {
.multiple(true)
.empty_values(false),
)
.subcommand(
SubCommand::with_name("init-cache")
.about("Load syntax definitions and themes into cache"),
)
.help_message("Print this help message.")
.version_message("Show version information.")
.get_matches();
let result = run(&matches);
match app_matches.subcommand() {
("init-cache", Some(_)) => {
let assets = HighlightingAssets::from_files()?;
assets.save()?;
}
_ => {
let options = Options {
true_color: is_truecolor_terminal(),
};
let assets = HighlightingAssets::from_cache()?;
let theme = assets.theme_set.themes.get("Default").ok_or_else(|| {
io::Error::new(
io::ErrorKind::Other,
format!("Could not find 'Default' theme"),
)
})?;
if let Some(files) = app_matches.values_of("FILE") {
for file in files {
let line_changes = get_git_diff(&file.to_string());
print_file(&options, theme, &assets.syntax_set, file, &line_changes)?;
}
}
}
}
Ok(())
}
fn main() {
let result = run();
if let Err(error) = result {
match error {