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72 lines
1.9 KiB
72 lines
1.9 KiB
use std::error::Error;
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use std::fmt;
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use std::fs::File as FsFile;
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use std::io::{Read, Write};
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use std::path::Path;
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use resources::Resource;
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use symbols::{Action, OwnedSymbolAction, Symbol, SymbolAction, SymbolRunner};
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pub struct File<C: AsRef<str>, D: AsRef<Path>> {
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path: D,
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content: C,
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}
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impl<C: AsRef<str>, D: AsRef<Path>> File<C, D> {
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pub fn new(path: D, content: C) -> Self {
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Self { path, content }
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}
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}
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impl<C: AsRef<str>, D: AsRef<Path>> Symbol for File<C, D> {
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fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
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if !self.path.as_ref().exists() {
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return Ok(false);
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}
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let file = FsFile::open(self.path.as_ref())?;
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// Check if content is the same
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let mut file_content = file.bytes();
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let mut target_content = self.content.as_ref().bytes();
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loop {
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match (file_content.next(), target_content.next()) {
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(None, None) => return Ok(true),
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(Some(Ok(a)), Some(b)) if a == b => {}
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(Some(Err(e)), _) => return Err(Box::new(e)),
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(_, _) => return Ok(false),
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}
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}
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}
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fn execute(&self) -> Result<(), Box<dyn Error>> {
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let mut file = FsFile::create(self.path.as_ref())?;
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file.write_all(self.content.as_ref().as_bytes())?;
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Ok(())
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}
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fn get_prerequisites(&self) -> Vec<Resource> {
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if let Some(parent) = self.path.as_ref().parent() {
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vec![Resource::new("dir", parent.to_str().unwrap())]
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} else {
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vec![]
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}
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}
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fn as_action<'a>(&'a self, runner: &'a dyn SymbolRunner) -> Box<dyn Action + 'a> {
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Box::new(SymbolAction::new(runner, self))
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}
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fn into_action<'a>(self: Box<Self>, runner: &'a dyn SymbolRunner) -> Box<dyn Action + 'a>
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where
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Self: 'a,
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{
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Box::new(OwnedSymbolAction::new(runner, *self))
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}
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}
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impl<C: AsRef<str>, D: AsRef<Path>> fmt::Display for File<C, D> {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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write!(f, "File {}", self.path.as_ref().display())
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}
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}
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