80 lines
2.4 KiB
Rust
80 lines
2.4 KiB
Rust
//! Copyright (C) 2022, Dmitriy Pleshevskiy <dmitriy@pleshevski.ru>
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//!
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//! vnetod is free software: you can redistribute it and/or modify
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//! it under the terms of the GNU General Public License as published by
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//! the Free Software Foundation, either version 3 of the License, or
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//! (at your option) any later version.
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//!
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//! vnetod is distributed in the hope that it will be useful,
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//! but WITHOUT ANY WARRANTY; without even the implied warranty of
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//! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//! GNU General Public License for more details.
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//!
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//! You should have received a copy of the GNU General Public License
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//! along with vnetod. If not, see <https://www.gnu.org/licenses/>.
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//!
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#[cfg(feature = "color")]
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use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
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use crate::{cli::Args, domain};
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use std::fs::File;
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use std::io::Write;
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#[derive(Debug)]
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pub enum Error {
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OpenFile,
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WriteFile,
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}
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impl std::fmt::Display for Error {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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Error::OpenFile => f.write_str("Cannot open file"),
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Error::WriteFile => f.write_str("Cannot write file"),
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}
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}
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}
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impl std::error::Error for Error {}
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pub fn execute(args: &Args) -> Result<(), Error> {
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let content = std::fs::read_to_string(&args.file).map_err(|_| Error::OpenFile)?;
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let fs_writer = (!args.dry_run)
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.then(|| {
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File::create(args.output.as_ref().unwrap_or(&args.file)).map_err(|_| Error::OpenFile)
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})
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.transpose()?;
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let new_content = domain::switch::execute(domain::switch::Request {
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content: &content,
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sections: &args.sections,
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on_line: Some(Box::new(print_line)),
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});
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if let Some(mut fs_writer) = fs_writer {
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fs_writer
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.write_all(new_content.as_bytes())
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.map_err(|_| Error::WriteFile)?;
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}
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Ok(())
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}
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#[cfg(feature = "color")]
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fn print_line(line: &String) {
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let mut stdout = StandardStream::stdout(ColorChoice::Always);
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let color = line
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.starts_with("###")
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.then_some(Color::Yellow)
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.or_else(|| (!line.starts_with("#")).then_some(Color::Green));
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stdout.set_color(ColorSpec::new().set_fg(color)).ok();
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write!(&mut stdout, "{}", line).unwrap();
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stdout.reset().ok();
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}
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#[cfg(not(feature = "color"))]
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fn print_line(line: &String) {
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print!("{}", line)
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}
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