lux_cli/
path.rs

1use std::{env, str::FromStr as _};
2
3use clap::Subcommand;
4use eyre::Result;
5use lux_lib::{
6    config::Config,
7    path::{BinPath, PackagePath, Paths},
8};
9use strum_macros::{Display, EnumString, VariantNames};
10
11use clap::{Args, ValueEnum};
12
13use crate::utils::project::current_project_or_user_tree;
14
15#[derive(Args)]
16pub struct Path {
17    #[command(subcommand)]
18    cmd: Option<PathCmd>,
19
20    /// Prepend the rocks tree paths to the system paths.
21    #[clap(default_value_t = false)]
22    #[arg(long)]
23    prepend: bool,
24}
25
26#[derive(Subcommand, PartialEq, Eq, Debug, Clone)]
27#[clap(rename_all = "kebab_case")]
28enum PathCmd {
29    /// Generate an export statement for all paths.
30    /// (formatted as a shell command) [Default]
31    Full(FullArgs),
32    /// Generate a `LUA_PATH` expression for `lua` libraries in the lux tree.
33    /// (not formatted as a shell command)
34    Lua,
35    /// Generate a `LUA_CPATH` expression for native `lib` libraries in the lux tree.
36    /// (not formatted as a shell command)
37    C,
38    /// Generate a `PATH` expression for `bin` executables in the lux tree.
39    /// (not formatted as a shell command)
40    Bin,
41    /// Generate a `LUA_INIT` expression for the lux loader.
42    /// (not formatted as a shell command)
43    Init,
44}
45
46impl Default for PathCmd {
47    fn default() -> Self {
48        Self::Full(FullArgs::default())
49    }
50}
51
52#[derive(Args, PartialEq, Eq, Debug, Clone, Default)]
53struct FullArgs {
54    /// Do not export `PATH` (`bin` paths).
55    #[clap(default_value_t = false)]
56    #[arg(long)]
57    no_bin: bool,
58
59    /// Do not export `LUA_INIT` (`require('lux').loader()`).
60    #[clap(default_value_t = false)]
61    #[arg(long)]
62    no_init: bool,
63
64    /// The shell to format for.
65    #[clap(default_value_t = Shell::default())]
66    #[arg(long)]
67    shell: Shell,
68}
69
70#[derive(EnumString, VariantNames, Display, ValueEnum, PartialEq, Eq, Debug, Clone)]
71#[strum(serialize_all = "lowercase")]
72enum Shell {
73    Posix,
74    Fish,
75    Nu,
76}
77
78impl Default for Shell {
79    fn default() -> Self {
80        Self::Posix
81    }
82}
83
84pub async fn path(path_data: Path, config: Config) -> Result<()> {
85    let tree = current_project_or_user_tree(&config)?;
86    let paths = Paths::new(&tree)?;
87    let cmd = path_data.cmd.unwrap_or_default();
88    let prepend = path_data.prepend;
89    match cmd {
90        PathCmd::Full(args) => {
91            let mut result = String::new();
92            let shell = args.shell;
93            let package_path = mk_package_path(&paths, prepend)?;
94            if !package_path.is_empty() {
95                result.push_str(format_export(&shell, "LUA_PATH", &package_path).as_str());
96                result.push('\n')
97            }
98            let package_cpath = mk_package_cpath(&paths, prepend)?;
99            if !package_cpath.is_empty() {
100                result.push_str(format_export(&shell, "LUA_CPATH", &package_cpath).as_str());
101                result.push('\n')
102            }
103            if !args.no_bin {
104                let path = mk_bin_path(&paths, prepend)?;
105                if !path.is_empty() {
106                    result.push_str(format_export(&shell, "PATH", &path).as_str());
107                    result.push('\n')
108                }
109            }
110            if !args.no_init {
111                result.push_str(format_export(&shell, "LUA_INIT", &paths.init()).as_str());
112                result.push('\n')
113            }
114            println!("{}", &result);
115        }
116        PathCmd::Lua => println!("{}", &mk_package_path(&paths, prepend)?),
117        PathCmd::C => println!("{}", &mk_package_cpath(&paths, prepend)?),
118        PathCmd::Bin => println!("{}", &mk_bin_path(&paths, prepend)?),
119        PathCmd::Init => println!("{}", paths.init()),
120    }
121    Ok(())
122}
123
124fn mk_package_path(paths: &Paths, prepend: bool) -> Result<PackagePath> {
125    let mut result = if prepend {
126        PackagePath::from_str(env::var("LUA_PATH").unwrap_or_default().as_str()).unwrap_or_default()
127    } else {
128        PackagePath::default()
129    };
130    result.prepend(paths.package_path());
131    Ok(result)
132}
133
134fn mk_package_cpath(paths: &Paths, prepend: bool) -> Result<PackagePath> {
135    let mut result = if prepend {
136        PackagePath::from_str(env::var("LUA_CPATH").unwrap_or_default().as_str())
137            .unwrap_or_default()
138    } else {
139        PackagePath::default()
140    };
141    result.prepend(paths.package_cpath());
142    Ok(result)
143}
144
145fn mk_bin_path(paths: &Paths, prepend: bool) -> Result<BinPath> {
146    let mut result = if prepend {
147        BinPath::from_env()
148    } else {
149        BinPath::default()
150    };
151    result.prepend(paths.path());
152    Ok(result)
153}
154
155fn format_export<D>(shell: &Shell, var_name: &str, var: &D) -> String
156where
157    D: std::fmt::Display,
158{
159    match shell {
160        Shell::Posix => format!("export {}='{}';", var_name, var),
161        Shell::Fish => format!("set -x {} \"{}\";", var_name, var),
162        Shell::Nu => format!("$env.{} = \"{}\";", var_name, var),
163    }
164}
lux_cli/path.rs

lux_cli/
path.rs
