fec5b7ab0a
Changes: * use [tempfile] crate for auto mgmt of temp dirs * use concrete types in place of generics in `utils` module [tempfile]: https://github.com/Stebalien/tempfile
31 lines
891 B
Rust
31 lines
891 B
Rust
use std::fs;
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use std::path::Path;
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use tempfile::{Builder, TempDir};
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pub fn read_wasm(path: &Path) -> Result<Vec<u8>, String> {
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let data = fs::read(path).map_err(|err| err.to_string())?;
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if data.starts_with(&[b'\0', b'a', b's', b'm']) {
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Ok(data)
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} else {
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Err("Invalid Wasm file encountered".to_owned())
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}
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}
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pub fn prepare_workspace(exe_name: &str) -> Result<TempDir, String> {
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let prefix = format!("wasi_common_{}", exe_name);
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Builder::new()
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.prefix(&prefix)
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.tempdir()
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.map_err(|e| format!("couldn't create workspace in temp files: {}", e))
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}
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pub fn extract_exec_name_from_path(path: &Path) -> Result<String, String> {
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path.file_stem()
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.and_then(|s| s.to_str())
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.map(String::from)
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.ok_or(format!(
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"couldn't extract the file stem from path {}",
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path.display()
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))
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}
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