From 10b1417e03ec87a955e16a54866e5e288a70e920 Mon Sep 17 00:00:00 2001
From: jude <jude@jellywx.com>
Date: Sun, 18 Feb 2024 16:09:21 +0000
Subject: [PATCH] Initial commit

---
 .gitignore |  2 ++
 Cargo.lock | 16 ++++++++++++++++
 Cargo.toml | 14 ++++++++++++++
 src/bin.rs | 12 ++++++++++++
 src/lib.rs | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 92 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/bin.rs
 create mode 100644 src/lib.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c403c34
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+.idea/
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..d8f3a5a
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "md5"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
+
+[[package]]
+name = "qroc"
+version = "0.1.0"
+dependencies = [
+ "md5",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..7d0cb7b
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "qroc"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[[bin]]
+name = "bin"
+path = "src/bin.rs"
+
+[dependencies]
+md5 = "0.7.0"
diff --git a/src/bin.rs b/src/bin.rs
new file mode 100644
index 0000000..6835ce0
--- /dev/null
+++ b/src/bin.rs
@@ -0,0 +1,12 @@
+use qroc::perl;
+
+fn main() {
+    println!("{}", add(1, 2));
+}
+
+#[perl {
+    $_ =~ s/populate/a + b/g;
+}]
+fn add(a: isize, b: isize) -> isize {
+    populate
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..8968482
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,48 @@
+use proc_macro::TokenStream;
+use std::env;
+use std::fs::{create_dir_all, File};
+use std::io::Read;
+use std::path::Path;
+
+use std::process::Command;
+
+#[proc_macro_attribute]
+pub fn perl(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let out_path = format!("/tmp/{}/outputs", env!("CARGO_PKG_NAME"));
+    if !Path::new(&out_path).exists() {
+        create_dir_all(Path::new(&out_path)).expect("Couldn't create temp directory");
+    }
+
+    let pl = attr.to_string();
+    let body = item.to_string();
+
+    let filestub = format!("{:x}", md5::compute(format!("{}+{}", pl, body)));
+
+    let header_pl = format!(
+        "$_ = @ARGV[0]; {}; open (FH, '>', '{}/{}'); print FH $_;",
+        pl, out_path, filestub
+    );
+
+    let output = Command::new("perl")
+        .args(["-e", &header_pl, &body])
+        .output()
+        .expect("Failed to invoke perl");
+
+    if !output.stderr.is_empty() {
+        let err = String::from_utf8(output.stderr).expect("Couldn't decode UTF-8");
+        panic!("stderr(perl): {}", err)
+    } else {
+        if !output.stdout.is_empty() {
+            let stdout = String::from_utf8(output.stdout).expect("Couldn't decode UTF-8");
+            println!("stdout(perl): {}", stdout);
+        }
+
+        let mut outfile = File::open(Path::new(&format!("{}/{}", out_path, filestub)))
+            .expect("Couldn't open output file");
+        let mut tokens = String::new();
+        outfile
+            .read_to_string(&mut tokens)
+            .expect("Couldn't read output file");
+        tokens.parse().expect("Couldn't form token stream")
+    }
+}