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use strings::string_buffer::StringBuffer;
use std::fs::{self, File};
use std::io::{self, Write, Read, BufWriter};
use config::{NewlineStyle, Config, WriteMode};
use rustfmt_diff::{make_diff, print_diff, Mismatch};
use checkstyle::{output_header, output_footer, output_checkstyle_file};
pub type FileMap = Vec<FileRecord>;
pub type FileRecord = (String, StringBuffer);
pub fn append_newline(s: &mut StringBuffer) {
s.push_str("\n");
}
pub fn write_all_files<T>(file_map: &FileMap, out: &mut T, config: &Config) -> Result<(), io::Error>
where
T: Write,
{
output_header(out, config.write_mode()).ok();
for &(ref filename, ref text) in file_map {
write_file(text, filename, out, config)?;
}
output_footer(out, config.write_mode()).ok();
Ok(())
}
pub fn write_system_newlines<T>(
writer: T,
text: &StringBuffer,
config: &Config,
) -> Result<(), io::Error>
where
T: Write,
{
let mut writer = BufWriter::new(writer);
let style = if config.newline_style() == NewlineStyle::Native {
if cfg!(windows) {
NewlineStyle::Windows
} else {
NewlineStyle::Unix
}
} else {
config.newline_style()
};
match style {
NewlineStyle::Unix => write!(writer, "{}", text),
NewlineStyle::Windows => {
for (c, _) in text.chars() {
match c {
'\n' => write!(writer, "\r\n")?,
'\r' => continue,
c => write!(writer, "{}", c)?,
}
}
Ok(())
}
NewlineStyle::Native => unreachable!(),
}
}
pub fn write_file<T>(
text: &StringBuffer,
filename: &str,
out: &mut T,
config: &Config,
) -> Result<bool, io::Error>
where
T: Write,
{
fn source_and_formatted_text(
text: &StringBuffer,
filename: &str,
config: &Config,
) -> Result<(String, String), io::Error> {
let mut f = File::open(filename)?;
let mut ori_text = String::new();
f.read_to_string(&mut ori_text)?;
let mut v = Vec::new();
write_system_newlines(&mut v, text, config)?;
let fmt_text = String::from_utf8(v).unwrap();
Ok((ori_text, fmt_text))
}
fn create_diff(
filename: &str,
text: &StringBuffer,
config: &Config,
) -> Result<Vec<Mismatch>, io::Error> {
let (ori, fmt) = source_and_formatted_text(text, filename, config)?;
Ok(make_diff(&ori, &fmt, 3))
}
match config.write_mode() {
WriteMode::Replace => {
if let Ok((ori, fmt)) = source_and_formatted_text(text, filename, config) {
if fmt != ori {
let tmp_name = filename.to_owned() + ".tmp";
let bk_name = filename.to_owned() + ".bk";
{
let tmp_file = File::create(&tmp_name)?;
write_system_newlines(tmp_file, text, config)?;
}
fs::rename(filename, bk_name)?;
fs::rename(tmp_name, filename)?;
}
}
}
WriteMode::Overwrite => {
let (source, formatted) = source_and_formatted_text(text, filename, config)?;
if source != formatted {
let file = File::create(filename)?;
write_system_newlines(file, text, config)?;
}
}
WriteMode::Plain => {
write_system_newlines(out, text, config)?;
}
WriteMode::Display | WriteMode::Coverage => {
println!("{}:\n", filename);
write_system_newlines(out, text, config)?;
}
WriteMode::Diff => {
if let Ok((ori, fmt)) = source_and_formatted_text(text, filename, config) {
let mismatch = make_diff(&ori, &fmt, 3);
let has_diff = !mismatch.is_empty();
print_diff(mismatch, |line_num| {
format!("Diff in {} at line {}:", filename, line_num)
});
return Ok(has_diff);
}
}
WriteMode::Checkstyle => {
let diff = create_diff(filename, text, config)?;
output_checkstyle_file(out, filename, diff)?;
}
}
Ok(false)
}