workflow_core/
dirs.rs

1//!
2//! Access to home and data folder (windows) when running natively or
3//! within Node.js
4//!
5
6use cfg_if::cfg_if;
7use std::path::PathBuf;
8
9pub fn home_dir() -> Option<PathBuf> {
10    cfg_if! {
11        if #[cfg(target_arch = "wasm32")] {
12            if crate::runtime::is_node() {
13                nodejs::home_dir()
14            } else {
15                panic!("workflow_core::dirs::home_dir() is not supported on this platform (must be native of nodejs)");
16            }
17        } else {
18            dirs::home_dir()
19        }
20    }
21}
22
23pub fn data_dir() -> Option<PathBuf> {
24    cfg_if! {
25        if #[cfg(target_arch = "wasm32")] {
26            if crate::runtime::is_node() {
27                nodejs::data_dir()
28            } else {
29                panic!("workflow_core::dirs::home_dir() is not supported on this platform (must be native of nodejs)");
30            }
31        } else {
32            dirs::data_dir()
33        }
34    }
35}
36
37cfg_if! {
38    if #[cfg(target_arch = "wasm32")] {
39        mod nodejs {
40            use std::path::{Path,PathBuf};
41            use wasm_bindgen::prelude::*;
42            use js_sys::Reflect;
43
44            #[wasm_bindgen]
45            extern "C" {
46                pub fn require(s: &str) -> JsValue;
47            }
48
49            static mut HOME_DIR: Option<PathBuf> = None;
50            pub fn home_dir() -> Option<PathBuf> {
51                unsafe {
52                    HOME_DIR.get_or_insert_with(|| {
53                        Reflect::get(&require("os"), &JsValue::from_str("homedir"))
54                            .expect("Unable to get homedir")
55                            .dyn_into::<js_sys::Function>()
56                            .expect("os.homedir is not a function")
57                            .call0(&JsValue::UNDEFINED)
58                            .expect("Unable to get homedir")
59                            .as_string()
60                            .as_ref()
61                            .map(Path::new)
62                            .map(PathBuf::from)
63                            .expect("Unable to get nodejs homedir")
64                    });
65                    HOME_DIR.clone()
66                }
67            }
68
69            static mut DATA_DIR: Option<PathBuf> = None;
70            pub fn data_dir() -> Option<PathBuf> {
71                unsafe {
72                    DATA_DIR.get_or_insert_with(|| {
73                        if crate::runtime::is_windows() {
74                            crate::env::var("LOCALAPPDATA")
75                                .ok()
76                                .map(PathBuf::from)
77                                .expect("Unable to get LOCALAPPDATA")
78
79                        } else {
80                            home_dir()
81                                .expect("Unable to get nodejs data_dir (unable to get home_dir)")
82                        }
83                    });
84                    DATA_DIR.clone()
85                }
86            }
87        }
88    }
89}