From 09867c48cafab00c2a93cd7aaf5f93594c361883 Mon Sep 17 00:00:00 2001
From: Greg Shuflin <greg@everydayimshuflin.com>
Date: Mon, 1 Jul 2024 11:24:18 -0700
Subject: [PATCH] Pest parser WIP

---
 Cargo.lock        | 53 +++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml        |  2 ++
 src/justfile.pest |  9 ++++++++
 src/parser.rs     | 11 ++++++++++
 4 files changed, 75 insertions(+)
 create mode 100644 src/justfile.pest

diff --git a/Cargo.lock b/Cargo.lock
index 5ceb6c1..3d8e10c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -613,6 +613,8 @@ dependencies = [
  "log",
  "num_cpus",
  "percent-encoding",
+ "pest",
+ "pest_derive",
  "pretty_assertions",
  "rand",
  "regex",
@@ -737,6 +739,51 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
+[[package]]
+name = "pest"
+version = "2.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "560131c633294438da9f7c4b08189194b20946c8274c6b9e38881a7874dc8ee8"
+dependencies = [
+ "memchr",
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26293c9193fbca7b1a3bf9b79dc1e388e927e6cacaa78b4a3ab705a1d3d41459"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ec22af7d3fb470a85dd2ca96b7c577a1eb4ef6f1683a9fe9a8c16e136c04687"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7a240022f37c361ec1878d646fc5b7d7c4d28d5946e1a80ad5a7a4f4ca0bdcd"
+dependencies = [
+ "once_cell",
+ "pest",
+ "sha2",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -1198,6 +1245,12 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
+[[package]]
+name = "ucd-trie"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed646292ffc8188ef8ea4d1e0e0150fb15a5c2e12ad9b8fc191ae7a8a7f3c4b9"
+
 [[package]]
 name = "unicase"
 version = "2.7.0"
diff --git a/Cargo.toml b/Cargo.toml
index 9e9f0e3..c4c8e9b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,6 +37,8 @@ libc = "0.2.0"
 log = "0.4.4"
 num_cpus = "1.15.0"
 percent-encoding = "2.3.1"
+pest = "2.7.10"
+pest_derive = "2.7.10"
 rand = "0.8.5"
 regex = "1.10.4"
 semver = "1.0.20"
diff --git a/src/justfile.pest b/src/justfile.pest
new file mode 100644
index 0000000..23cfec6
--- /dev/null
+++ b/src/justfile.pest
@@ -0,0 +1,9 @@
+
+identifier = { (ASCII_ALPHA | "_") ~ (ASCII_ALPHANUMERIC | "_")+ }
+
+recipe = { identifier ~ ":" ~ NEWLINE ~ recipe_body }
+
+recipe_body = { recipe_line* }
+
+recipe_line = {
+
diff --git a/src/parser.rs b/src/parser.rs
index b1d088e..70b43aa 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -36,7 +36,18 @@ pub(crate) struct Parser<'run, 'src> {
   working_directory: &'run Path,
 }
 
+#[derive(pest_derive::Parser)]
+#[grammar = "justfile.pest"]
+struct JustfileParser;
+
 impl<'run, 'src> Parser<'run, 'src> {
+
+  pub(crate) fn parse_new(path: &'src Path, src: &'src str) -> CompileResult<'src, Ast<'src>> {
+
+    todo!()
+  }
+
+
   /// Parse `tokens` into an `Ast`
   pub(crate) fn parse(
     file_depth: u32,