rhg: Fall back to Python if ui.relative-paths is configured

This feature is not supported yet, and affects the output of some tests.

Differential Revision: https://phab.mercurial-scm.org/D10137

rust/rhg/src/commands/files.rs

@@ -1,61 +1,68 b''
 use crate::error::CommandError;
 use crate::ui::Ui;
 use clap::Arg;
 use hg::operations::list_rev_tracked_files;
 use hg::operations::Dirstate;
 use hg::repo::Repo;
 use hg::utils::files::{get_bytes_from_path, relativize_path};
 use hg::utils::hg_path::{HgPath, HgPathBuf};
 
 pub const HELP_TEXT: &str = "
 List tracked files.
 
 Returns 0 on success.
 ";
 
 pub fn args() -> clap::App<'static, 'static> {
     clap::SubCommand::with_name("files")
         .arg(
             Arg::with_name("rev")
                 .help("search the repository as it is in REV")
                 .short("-r")
                 .long("--revision")
                 .value_name("REV")
                 .takes_value(true),
         )
         .about(HELP_TEXT)
 }
 
 pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
+    let relative = invocation.config.get(b"ui", b"relative-paths");
+    if relative.is_some() {
+        return Err(CommandError::unsupported(
+            "non-default ui.relative-paths",
+        ));
+    }
+
     let rev = invocation.subcommand_args.value_of("rev");
 
     let repo = invocation.repo?;
     if let Some(rev) = rev {
         let files = list_rev_tracked_files(repo, rev).map_err(|e| (e, rev))?;
         display_files(invocation.ui, repo, files.iter())
     } else {
         let distate = Dirstate::new(repo)?;
         let files = distate.tracked_files()?;
         display_files(invocation.ui, repo, files)
     }
 }
 
 fn display_files<'a>(
     ui: &Ui,
     repo: &Repo,
     files: impl IntoIterator<Item = &'a HgPath>,
 ) -> Result<(), CommandError> {
     let cwd = HgPathBuf::from(get_bytes_from_path(hg::utils::current_dir()?));
     let working_directory =
         HgPathBuf::from(get_bytes_from_path(repo.working_directory_path()));
 
     let mut stdout = ui.stdout_buffer();
 
     for file in files {
         let file = working_directory.join(file);
         stdout.write_all(relativize_path(&file, &cwd).as_ref())?;
         stdout.write_all(b"\n")?;
     }
     stdout.flush()?;
     Ok(())
 }