rust: remove newly redundant `use` statements with the 2021 edition prelude
https://doc.rust-lang.org/edition-guide/rust-2021/prelude.html
use crate::error::CommandError;
use clap::Arg;
use format_bytes::format_bytes;
use hg::operations::cat;
use hg::utils::hg_path::HgPathBuf;
use micro_timer::timed;
pub const HELP_TEXT: &str = "
Output the current or given revision of files
";
pub fn args() -> clap::App<'static, 'static> {
clap::SubCommand::with_name("cat")
.arg(
Arg::with_name("rev")
.help("search the repository as it is in REV")
.short("-r")
.long("--rev")
.value_name("REV")
.takes_value(true),
)
.arg(
clap::Arg::with_name("files")
.required(true)
.multiple(true)
.empty_values(false)
.value_name("FILE")
.help("Files to output"),
)
.about(HELP_TEXT)
}
#[timed]
pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
let cat_enabled_default = true;
let cat_enabled = invocation.config.get_option(b"rhg", b"cat")?;
if !cat_enabled.unwrap_or(cat_enabled_default) {
return Err(CommandError::unsupported(
"cat is disabled in rhg (enable it with 'rhg.cat = true' \
or enable fallback with 'rhg.on-unsupported = fallback')",
));
}
let rev = invocation.subcommand_args.value_of("rev");
let file_args = match invocation.subcommand_args.values_of("files") {
Some(files) => files.collect(),
None => vec![],
};
let repo = invocation.repo?;
let cwd = hg::utils::current_dir()?;
let working_directory = repo.working_directory_path();
let working_directory = cwd.join(working_directory); // Make it absolute
let mut files = vec![];
for file in file_args.iter() {
if file.starts_with("set:") {
let message = "fileset";
return Err(CommandError::unsupported(message));
}
let normalized = cwd.join(&file);
// TODO: actually normalize `..` path segments etc?
let dotted = normalized.components().any(|c| c.as_os_str() == "..");
if file == &"." || dotted {
let message = "`..` or `.` path segment";
return Err(CommandError::unsupported(message));
}
let relative_path = working_directory
.strip_prefix(&cwd)
.unwrap_or(&working_directory);
let stripped = normalized
.strip_prefix(&working_directory)
.map_err(|_| {
CommandError::abort(format!(
"abort: {} not under root '{}'\n(consider using '--cwd {}')",
file,
working_directory.display(),
relative_path.display(),
))
})?;
let hg_file = HgPathBuf::try_from(stripped.to_path_buf())
.map_err(|e| CommandError::abort(e.to_string()))?;
files.push(hg_file);
}
let files = files.iter().map(|file| file.as_ref()).collect();
// TODO probably move this to a util function like `repo.default_rev` or
// something when it's used somewhere else
let rev = match rev {
Some(r) => r.to_string(),
None => format!("{:x}", repo.dirstate_parents()?.p1),
};
let output = cat(&repo, &rev, files).map_err(|e| (e, rev.as_str()))?;
for (_file, contents) in output.results {
invocation.ui.write_stdout(&contents)?;
}
if !output.missing.is_empty() {
let short = format!("{:x}", output.node.short()).into_bytes();
for path in &output.missing {
invocation.ui.write_stderr(&format_bytes!(
b"{}: no such file in rev {}\n",
path.as_bytes(),
short
))?;
}
}
if output.found_any {
Ok(())
} else {
Err(CommandError::Unsuccessful)
}
}