rust/rhg/src/commands/debugignorerhg.rs

dirstate-v2: hash the source of the ignore patterns as well

Fixes the test introduced in the last changeset. This caused the hash
to change, which means that the check in the test had to be adapted.
Since this hash is only done as a caching mechanism, invalidation does
not pose any backwards compatibility issues.

use crate::error::CommandError;
use clap::SubCommand;
use hg;
use hg::matchers::get_ignore_matcher;
use hg::StatusError;
use log::warn;

pub const HELP_TEXT: &str = "
Show effective hgignore patterns used by rhg.

This is a pure Rust version of `hg debugignore`.

Some options might be missing, check the list below.
";

pub fn args() -> clap::App<'static, 'static> {
    SubCommand::with_name("debugignorerhg").about(HELP_TEXT)
}

pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
    let repo = invocation.repo?;

    let ignore_file = repo.working_directory_vfs().join(".hgignore"); // TODO hardcoded

    let (ignore_matcher, warnings) = get_ignore_matcher(
        vec![ignore_file],
        &repo.working_directory_path().to_owned(),
        &mut |_source, _pattern_bytes| (),
    )
    .map_err(|e| StatusError::from(e))?;

    if !warnings.is_empty() {
        warn!("Pattern warnings: {:?}", &warnings);
    }

    let patterns = ignore_matcher.debug_get_patterns();
    invocation.ui.write_stdout(patterns)?;
    invocation.ui.write_stdout(b"\n")?;
    Ok(())
}