blanket_rs/resource/
virtual_file.rs

1use std::cell::RefCell;
2use std::path::{Path, PathBuf};
3use std::rc::Rc;
4
5use crate::builder::{Build, Builder, Dependency};
6
7pub struct VirtualFile {
8    path: PathBuf,
9    content: Option<String>,
10}
11
12impl VirtualFile {
13    pub fn new<P: AsRef<Path>>(path: P) -> Self {
14        Self {
15            path: path.as_ref().to_path_buf(),
16            content: None,
17        }
18    }
19    pub fn content(&self) -> Option<&str> {
20        self.content.as_deref()
21    }
22}
23
24impl std::fmt::Debug for VirtualFile {
25    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
26        write!(
27            f,
28            "{} {{ path: {:?} }}",
29            std::any::type_name::<Self>()
30                .split("::")
31                .last()
32                .unwrap_or("UnknownType"),
33            self.path
34        )
35    }
36}
37
38impl PartialEq for VirtualFile {
39    fn eq(&self, other: &Self) -> bool {
40        self.path == other.path
41    }
42}
43
44impl Build for VirtualFile {
45    fn as_any(&self) -> &dyn std::any::Any {
46        self
47    }
48    fn equals(&self, other: Rc<RefCell<dyn Build>>) -> bool {
49        let other = other.borrow();
50        let any = other.as_any();
51        match any.downcast_ref::<Self>() {
52            Some(other) => self == other,
53            None => false,
54        }
55    }
56    fn register(
57        self,
58        builder: &mut Builder,
59    ) -> Result<(Option<PathBuf>, Dependency, Vec<Dependency>), Box<dyn std::error::Error>> {
60        let dependency = builder.make_dependency(self)?;
61        Ok((None, dependency, vec![]))
62    }
63    fn generate(&mut self) -> Result<(), Box<dyn std::error::Error>> {
64        let VirtualFile { path, .. } = self;
65        self.content = Some(std::fs::read_to_string(path)?);
66        Ok(())
67    }
68}
69
70pub fn extract_content(dependency: &Dependency) -> Result<String, Box<dyn std::error::Error>> {
71    let resource = dependency.resource();
72    let resource = resource.borrow();
73    let any = resource.as_any();
74    let resource = match any.downcast_ref::<VirtualFile>() {
75        Some(resource) => resource,
76        None => return Err("resource is not a virtual file".into()),
77    };
78    let content = match resource.content() {
79        Some(content) => content.to_string(),
80        None => return Err("resource has no content".into()),
81    };
82    Ok(content)
83}
blanket_rs/resource/virtual_file.rs

blanket_rs/resource/
virtual_file.rs
