js_macros/
lib.rs

1
2#![doc = include_str!("../README.md")]
3
4// AUTO-GENERATED LIB FILE - DON'T MODIFY
5
6extern crate proc_macro;
7
8use proc_macro::{LexError, TokenStream};
9use std::process::Command;
10use proc_macro_error::*;
11
12fn run_node_macro(
13    macro_input: TokenStream,
14    macro_args: Option<TokenStream>,
15    node_script_path: &str,
16) -> Result<TokenStream, LexError> {
17    let output = Command::new("node")
18        .arg("-e")
19        .arg(format!(
20            r"
21                MACRO_INPUT = {:?};
22                MACRO_ARGUMENTS = {:?};
23                MACRO_OUTPUT = '';
24                require({:?});
25                console.log('MACRO_OUTPUT: ' + MACRO_OUTPUT);
26            ",
27            macro_input.to_string(),
28            macro_args.map(|a| a.to_string()).unwrap_or_default(),
29            node_script_path
30        ))
31        .output()
32        .unwrap_or_else(|e| {
33            if let std::io::ErrorKind::NotFound = e.kind() {
34                panic!("No `node` command found in PATH");
35            }
36
37            panic!("IO Error running JS macro: {}", e)
38        });
39
40    if !output.status.success() {
41        emit_call_site_error!(format!("Error occurred running JS macro:\n{}\n", String::from_utf8_lossy(&output.stderr)));
42        return Ok(Default::default());
43    }
44
45    let macro_output = std::str::from_utf8(&output.stdout)
46        .expect("JS Macro had unexpected non-utf8 output")
47        .split("MACRO_OUTPUT: ")
48        .nth(1)
49        .expect("JS Macro unexpectedly missing macro output");
50
51    macro_output.parse()
52}
53#[proc_macro_error]
54                #[proc_macro_derive(SayHello, attributes(hello_message))]
55                #[allow(non_snake_case)] #[doc(hidden)]
56                pub fn SayHello(input: TokenStream) -> TokenStream {
57                    run_node_macro(input, None, "/Users/agrant/w/js-macros/target/debug/build/js-macros-6770ecadfd1cfef1/out/custom_derive.js").unwrap()
58                }#[proc_macro_error]
59                #[proc_macro]
60                #[allow(non_snake_case)] #[doc(hidden)]
61                pub fn hello_world(input: TokenStream) -> TokenStream {
62                    run_node_macro(input, None, "/Users/agrant/w/js-macros/target/debug/build/js-macros-6770ecadfd1cfef1/out/custom_function.js").unwrap()
63                }#[proc_macro_error]
64                #[proc_macro_attribute]
65                #[allow(non_snake_case)] #[doc(hidden)]
66                pub fn say_hello(args: TokenStream, input: TokenStream) -> TokenStream {
67                    run_node_macro(input, Some(args), "/Users/agrant/w/js-macros/target/debug/build/js-macros-6770ecadfd1cfef1/out/custom_attribute.js").unwrap()
68                }
js_macros/lib.rs

js_macros/
lib.rs
