Replace build script with private crate

Closes GH-34.
Closes GH-35.

2 files changed, 19 insertions, 2 deletions

diff --git a/generate/Cargo.toml b/generate/Cargo.toml
new file mode 100644
index 0000000..7a2cf63
--- /dev/null
+++ b/generate/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "markdown-generate"
+version = "0.0.0"
+authors = ["Titus Wormer <tituswormer@gmail.com>"]
+edition = "2018"
+publish = false
+
+[dependencies]
+regex = "1"
+reqwest = "0.11"
+tokio = { version = "1", features = ["full"] }
diff --git a/build.rs b/generate/src/main.rs
index 658cb0a..9f0d14b 100644
--- a/build.rs
+++ b/generate/src/main.rs
@@ -1,3 +1,9 @@
+// To regenerate, run the following from the repository root:
+//
+// ```sh
+// cargo run --manifest-path generate/Cargo.toml
+// ```
+
 use regex::Regex;
 use std::fs;
 
@@ -63,7 +69,7 @@ async fn commonmark() {
     let doc = format!(
         "//! `CommonMark` test suite.
 
-// > 👉 **Important**: this module is generated by `build.rs`.
+// > 👉 **Important**: this module is generated by `generate/src/main.rs`.
 // > It is generate from the latest CommonMark website.
 
 use markdown::{{to_html_with_options, CompileOptions, Options}};
@@ -130,7 +136,7 @@ async fn punctuation() {
 
 /// List of characters that are considered punctuation.
 ///
-/// > 👉 **Important**: this module is generated by `build.rs`.
+/// > 👉 **Important**: this module is generated by `generate/src/main.rs`.
 /// > It is generate from the latest Unicode data.
 ///
 /// Rust does not contain an `is_punctuation` method on `char`, while it does