feat(tools/cheddar): Check in new syntax highlighting tool
The first step with this tool will be to use it as a source-filter for cgit. The second step is to use it as the Markdown renderer by depending on one of the Markdown libraries, with integration for rendering code snippets directly.
This commit is contained in:
Vincent Ambo
parent
87cf3a2c6f
commit
4681c07bde
8 changed files with 772 additions and 2 deletions
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@ -1,8 +1,6 @@
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depot
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=====
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[](https://travis-ci.org/tazjin/depot)
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This repository is the [monorepo][] for my personal tools and infrastructure.
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Everything in here is built using [Nix][] with an automatic attribute-set layout
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that mirrors the filesystem layout of the repository (this might feel familiar
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1
tools/cheddar/.gitignore
vendored
Normal file
1
tools/cheddar/.gitignore
vendored
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@ -0,0 +1 @@
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target/
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0
tools/cheddar/.skip-subtree
Normal file
0
tools/cheddar/.skip-subtree
Normal file
666
tools/cheddar/Cargo.lock
generated
Normal file
666
tools/cheddar/Cargo.lock
generated
Normal file
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@ -0,0 +1,666 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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|
||||
"checksum safemem 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
|
||||
"checksum same-file 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "585e8ddcedc187886a30fa705c47985c3fa88d06624095856b36ca0b82ff4421"
|
||||
"checksum serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)" = "414115f25f818d7dfccec8ee535d76949ae78584fc4f79a6f45a904bf8ab4449"
|
||||
"checksum serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)" = "128f9e303a5a29922045a830221b8f78ec74a5f544944f3d5984f8ec3895ef64"
|
||||
"checksum serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)" = "48c575e0cc52bdd09b47f330f646cf59afc586e9c4e3ccd6fc1f625b8ea1dad7"
|
||||
"checksum shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7fdf1b9db47230893d76faad238fd6097fd6d6a9245cd7a4d90dbd639536bbd2"
|
||||
"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
|
||||
"checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
|
||||
"checksum syntect 3.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "955e9da2455eea5635f7032fc3a229908e6af18c39600313866095e07db0d8b8"
|
||||
"checksum termcolor 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "96d6098003bde162e4277c70665bd87c326f5a0c3f3fbfb285787fa482d54e6e"
|
||||
"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
|
||||
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
|
||||
"checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
|
||||
"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
|
||||
"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
|
||||
"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
|
||||
"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
|
||||
"checksum walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9658c94fa8b940eab2250bd5a457f9c48b748420d71293b165c8cdbe2f55f71e"
|
||||
"checksum which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
|
||||
"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
|
||||
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
"checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
|
||||
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
"checksum wincolor 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "96f5016b18804d24db43cebf3c77269e7569b8954a8464501c216cc5e070eaa9"
|
||||
"checksum xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "541b12c998c5b56aa2b4e6f18f03664eef9a4fd0a246a55594efae6cc2d964b5"
|
||||
"checksum yaml-rust 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "65923dd1784f44da1d2c3dbbc5e822045628c590ba72123e1c73d3c230c4434d"
|
||||
8
tools/cheddar/Cargo.toml
Normal file
8
tools/cheddar/Cargo.toml
Normal file
|
|
@ -0,0 +1,8 @@
|
|||
[package]
|
||||
name = "cheddar"
|
||||
version = "0.1.0"
|
||||
authors = ["Vincent Ambo <mail@tazj.in>"]
|
||||
edition = "2018"
|
||||
|
||||
[dependencies.syntect]
|
||||
version = "3.3"
|
||||
10
tools/cheddar/README.md
Normal file
10
tools/cheddar/README.md
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
cheddar
|
||||
=======
|
||||
|
||||
Cheddar is a tiny Rust tool that uses [syntect][] to render source code to
|
||||
syntax-highlighted HTML.
|
||||
|
||||
The name was chosen because I was eyeing a pack of cheddar-flavoured crisps
|
||||
while thinking about name selection.
|
||||
|
||||
[syntect]: https://github.com/trishume/syntect
|
||||
3
tools/cheddar/default.nix
Normal file
3
tools/cheddar/default.nix
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
{ pkgs, ... }:
|
||||
|
||||
pkgs.third_party.naersk.buildPackage ./.
|
||||
84
tools/cheddar/src/main.rs
Normal file
84
tools/cheddar/src/main.rs
Normal file
|
|
@ -0,0 +1,84 @@
|
|||
use std::env;
|
||||
use std::ffi::OsStr;
|
||||
use std::io::BufRead;
|
||||
use std::io;
|
||||
use std::path::Path;
|
||||
use syntect::easy::HighlightLines;
|
||||
use syntect::highlighting::ThemeSet;
|
||||
use syntect::parsing::{SyntaxSet, SyntaxReference};
|
||||
|
||||
use syntect::html::{
|
||||
append_highlighted_html_for_styled_line,
|
||||
start_highlighted_html_snippet,
|
||||
IncludeBackground,
|
||||
};
|
||||
|
||||
fn syntax_from_args(syntaxes: &SyntaxSet) -> Option<&SyntaxReference> {
|
||||
// The name of the file to be formatted is usually passed in as
|
||||
// the first argument and can be used to determine a syntax set.
|
||||
let args = env::args().collect::<Vec<String>>();
|
||||
if args.len() != 2 {
|
||||
return None
|
||||
}
|
||||
|
||||
Path::new(&args[1])
|
||||
.extension()
|
||||
.and_then(OsStr::to_str)
|
||||
.and_then(|ext| syntaxes.find_syntax_by_extension(ext))
|
||||
}
|
||||
|
||||
fn should_continue(res: &io::Result<usize>) -> bool {
|
||||
match *res {
|
||||
Ok(n) => n > 0,
|
||||
Err(_) => false,
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let syntaxes = SyntaxSet::load_defaults_newlines();
|
||||
|
||||
let stdin = io::stdin();
|
||||
let mut stdin = stdin.lock();
|
||||
let mut linebuf = String::new();
|
||||
|
||||
// Get the first line, we might need it for syntax identification.
|
||||
let mut read_result = stdin.read_line(&mut linebuf);
|
||||
|
||||
// Set up the highlighter
|
||||
let ts = ThemeSet::load_defaults();
|
||||
let theme = &ts.themes["InspiredGitHub"];
|
||||
|
||||
let syntax = syntax_from_args(&syntaxes)
|
||||
.or_else(|| syntaxes.find_syntax_by_first_line(&linebuf))
|
||||
.unwrap_or_else(|| syntaxes.find_syntax_plain_text());
|
||||
|
||||
let mut hl = HighlightLines::new(syntax, theme);
|
||||
let (mut outbuf, bg) = start_highlighted_html_snippet(theme);
|
||||
|
||||
// Rather than using the `lines` iterator, read each line manually
|
||||
// and maintain buffer state.
|
||||
//
|
||||
// This is done because the syntax highlighter requires trailing
|
||||
// newlines to be efficient, and those are stripped in the lines
|
||||
// iterator.
|
||||
while should_continue(&read_result) {
|
||||
let regions = hl.highlight(&linebuf, &syntaxes);
|
||||
|
||||
append_highlighted_html_for_styled_line(
|
||||
®ions[..],
|
||||
IncludeBackground::IfDifferent(bg),
|
||||
&mut outbuf,
|
||||
);
|
||||
|
||||
// immediately output the current state to avoid keeping
|
||||
// things in memory
|
||||
print!("{}", outbuf);
|
||||
|
||||
// merry go round again
|
||||
linebuf.clear();
|
||||
outbuf.clear();
|
||||
read_result = stdin.read_line(&mut linebuf);
|
||||
}
|
||||
|
||||
println!("</pre>");
|
||||
}
|
||||
Loading…
Reference in a new issue