dbg-swc 51.0.0

Debug utilities
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

use std::{
    fs,
    path::{Path, PathBuf},
    process::{Command, Stdio},
    sync::Arc,
};

use anyhow::{bail, Context, Result};
use clap::{Args, Subcommand};
use swc_common::SourceMap;
use swc_ecma_minifier::option::MinifyOptions;
use swc_ecma_transforms_base::fixer::fixer;
use swc_ecma_visit::VisitMutWith;
use swc_timer::timer;
use tracing::info;

use crate::{bundle::bundle, util::print_js};

/// [Experimental] Execute a javascript file after performing some
/// preprocessing.
#[derive(Debug, Subcommand)]
pub enum ExecForTestingCommand {
    MinifiedBundle(TestMinifiedBundleCommand),
}

impl ExecForTestingCommand {
    pub fn run(self, cm: Arc<SourceMap>) -> Result<()> {
        let _timer = timer!("test");

        let output = {
            let _timer = timer!("process");

            match self {
                ExecForTestingCommand::MinifiedBundle(cmd) => cmd.run(cm),
            }?
        };

        {
            let _timer = timer!("run");
            let stdout = output
                .runtime
                .execute(&output.path)
                .context("failed to execute generated code")?;

            info!("----- Stdout -----\n{}", stdout);
        }

        Ok(())
    }
}

#[derive(Debug, Args)]
pub struct TestMinifiedBundleCommand {
    entry: String,
}

impl TestMinifiedBundleCommand {
    fn run(self, cm: Arc<SourceMap>) -> Result<Output> {
        let bundle = bundle(cm.clone(), &self.entry)?;

        let mut minified = {
            let _timer = timer!("minify");
            swc_ecma_minifier::optimize(
                bundle.module.into(),
                cm.clone(),
                None,
                None,
                &MinifyOptions {
                    compress: Some(Default::default()),
                    mangle: Some(Default::default()),
                    ..Default::default()
                },
                &swc_ecma_minifier::option::ExtraOptions {
                    unresolved_mark: bundle.unresolved_mark,
                    top_level_mark: bundle.top_level_mark,
                    mangle_name_cache: None,
                },
            )
            .expect_module()
        };

        minified.visit_mut_with(&mut fixer(None));

        let code = print_js(cm, &minified, true).context("failed to convert ast to code")?;

        let path = Path::new("output.js").to_path_buf();
        fs::write(&path, code.as_bytes()).context("failed to write code as file")?;

        Ok(Output {
            path,
            runtime: JsRuntime::Deno,
        })
    }
}

pub struct Output {
    pub path: PathBuf,
    pub runtime: JsRuntime,
}

pub enum JsRuntime {
    // Node,
    Deno,
}

impl JsRuntime {
    pub fn execute(&self, path: &Path) -> Result<String> {
        match self {
            // JsRuntime::Node => todo!("node.execute"),
            JsRuntime::Deno => {
                let mut cmd = Command::new("deno");
                cmd.arg("run").arg("--no-check");

                cmd.arg(path);

                cmd.stderr(Stdio::inherit());

                let output = cmd.output().context("failed to get output from deno")?;

                if !output.status.success() {
                    bail!("deno exited with status {}", output.status);
                }

                Ok(
                    (String::from_utf8(output.stdout).context("deno emitted non-utf8 string")?)
                        .trim()
                        .to_string(),
                )
            }
        }
    }
}