lux_cli/
shell.rs

1use clap::Args;
2use lux_lib::{config::Config, lua_installation::LuaInstallation, path::Paths, tree::InstallTree};
3
4use miette::{miette, IntoDiagnostic, Result};
5use which::which;
6
7use std::{env, path::PathBuf};
8use tokio::process::Command;
9
10use super::workspace::current_workspace_or_user_tree;
11
12#[derive(Args)]
13pub struct Shell {
14    /// Add test dependencies to the shell's paths,{n}
15    /// in addition to the regular dependencies.
16    #[arg(long)]
17    test: bool,
18
19    /// Add *only* build dependencies to the shell's paths.
20    #[arg(long, conflicts_with = "test")]
21    build: bool,
22
23    /// Disable the Lux loader.{n}
24    /// If a rock has conflicting transitive dependencies,{n}
25    /// disabling the Lux loader may result in the wrong modules being loaded.{n}
26    #[arg(long)]
27    no_loader: bool,
28}
29
30pub async fn shell(data: Shell, config: Config) -> Result<()> {
31    if env::var("LUX_SHELL").is_ok_and(|lx_shell_var| lx_shell_var == "1") {
32        return Err(miette!(
33            help = r#"Lux does not support nested shells.
34exit the current shell if you would like to enter a new one."#,
35            "already in a Lux shell"
36        ));
37    }
38
39    let tree = current_workspace_or_user_tree(&config)?;
40
41    let path = if data.build {
42        let build_tree_path = tree.build_tree(&config)?;
43        Paths::new(&build_tree_path)?
44    } else {
45        let mut path = Paths::new(&tree)?;
46        if data.test {
47            let test_tree_path = tree.test_tree(&config)?;
48            let test_path = Paths::new(&test_tree_path)?;
49            path.prepend(&test_path);
50        }
51        path
52    };
53
54    let shell: PathBuf = match env::var("SHELL") {
55        Ok(val) => PathBuf::from(val),
56        Err(_) => {
57            #[cfg(any(target_os = "linux", target_os = "android"))]
58            let fallback = which("bash")
59                .into_diagnostic()
60                .map_err(|_| miette!("cannot find `bash` on your system!"))?;
61
62            #[cfg(target_os = "windows")]
63            let fallback = which("cmd.exe")
64                .into_diagnostic()
65                .map_err(|_| miette!("cannot find `cmd.exe` on your system!"))?;
66
67            #[cfg(target_os = "macos")]
68            let fallback = which("zsh")
69                .into_diagnostic()
70                .map_err(|_| miette!("cannot find `zsh` on your system!"))?;
71
72            fallback
73        }
74    };
75
76    let lua_path = path.package_path_prepended();
77    let lua_cpath = path.package_cpath_prepended();
78
79    let lua_init = if data.no_loader {
80        None
81    } else if tree.version().lux_lib_dir().is_none() {
82        tracing::warn!(
83            r#"lux-lua library not found.
84Cannot use the `lux.loader`.
85To suppress this warning, set the `--no-loader` option."#
86        );
87        None
88    } else {
89        Some(path.init())
90    };
91
92    let lua_version = tree.version();
93
94    let mut bin_path = path.path_prepended();
95
96    let lua = LuaInstallation::new(lua_version, &config).await?;
97    if let Some(lua_bin_path) = lua.bin().as_ref().and_then(|lua_bin| lua_bin.parent()) {
98        bin_path.add_path(lua_bin_path.to_path_buf());
99    }
100
101    let _ = Command::new(&shell)
102        .env("PATH", bin_path.joined())
103        .env("LUA_PATH", lua_path.joined())
104        .env("LUA_CPATH", lua_cpath.joined())
105        .env("LUA_INIT", lua_init.unwrap_or_default())
106        .env("LUX_SHELL", "1")
107        .spawn()
108        .into_diagnostic()?
109        .wait()
110        .await
111        .into_diagnostic()?;
112
113    Ok(())
114}
lux_cli/shell.rs

lux_cli/
shell.rs
