comparison rust/rhg/src/commands/cat.rs @ 46757:b1f2c2b336ec

rhg: `cat` command: print error messages for missing files

And exit with an error code if no file was matched.
This matches the behavior of Python-based hg.

Differential Revision: https://phab.mercurial-scm.org/D10142

46756:84a3deca963a

use crate::error::CommandError;
use clap::Arg;
use hg::operations::cat;
use hg::utils::hg_path::HgPathBuf;
use micro_timer::timed;
use std::convert::TryFrom;

        files.push(hg_file);
    }

    match rev {
        Some(rev) => {
            let data = cat(&repo, rev, &files).map_err(|e| (e, rev))?;
            invocation.ui.write_stdout(&data)?;
            Ok(())
        }
        None => Err(CommandError::unsupported(
            "`rhg cat` without `--rev` / `-r`",
        )),
    }

46757:b1f2c2b336ec

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;
use std::convert::TryFrom;

        files.push(hg_file);
    }

    match rev {
        Some(rev) => {
            let output = cat(&repo, rev, &files).map_err(|e| (e, rev))?;
            invocation.ui.write_stdout(&output.concatenated)?;
            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)
            }
        }
        None => Err(CommandError::unsupported(
            "`rhg cat` without `--rev` / `-r`",
        )),
    }