Move run to a separate module

Keeps main.rs for CLI logic only.

1 files changed, 2 insertions, 293 deletions

diff --git a/src/main.rs b/src/main.rs
index dbd1a60..d9ba728 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,16 +1,12 @@
 use std::{
-    collections::HashSet,
     env,
-    ffi::OsStr,
-    io::{self, Read, Write},
-    os::unix::ffi::OsStrExt,
+    io::{self},
     path::Path,
 };
 
 use repo2markdown::{
     logger::{Logger, Verbosity},
-    normalizer::Normalizer,
-    renderer::Renderer,
+    run::run,
 };
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -55,290 +51,3 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         logger,
     )
 }
-
-const DEFAULT_PROJECT_NAME: &str = "Project Outline";
-
-pub fn run<R: Read, W: Write>(
-    mut input: R,
-    output: W,
-    root: &Path,
-    origin_base: &Path,
-    project_name: Option<&str>,
-    logger: Logger,
-) -> Result<(), Box<dyn std::error::Error>> {
-    let mut buf = Vec::new();
-    input.read_to_end(&mut buf)?;
-
-    let normalizer = Normalizer::new(root, origin_base)?;
-
-    let mut renderer = Renderer::new(output).with_logger(logger);
-    let project_name = project_name.unwrap_or_else(|| derive_project_name(root));
-    renderer.render_header(project_name)?;
-
-    let mut seen_paths = HashSet::new();
-    for segment in buf.split(|b| *b == 0) {
-        if segment.is_empty() {
-            continue;
-        }
-
-        let path = Path::new(OsStr::from_bytes(segment));
-        let normalized_path = normalizer.normalize(path)?;
-        if !seen_paths.insert(normalized_path.relative.clone()) {
-            logger.warn(format!(
-                "Duplicate file detected: {:?}",
-                normalized_path.relative
-            ));
-            continue;
-        }
-        renderer.render_path(&normalized_path)?;
-    }
-    Ok(())
-}
-
-fn derive_project_name(root: &Path) -> &str {
-    if let Some(os_str_name) = root.file_name()
-        && let Some(name) = os_str_name.to_str()
-    {
-        name
-    } else {
-        DEFAULT_PROJECT_NAME
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::ffi::OsStr;
-    use std::fs;
-    use std::io::{Cursor, Read, Write};
-    use std::os::unix::ffi::OsStrExt;
-    use std::path::Path;
-
-    use repo2markdown::logger::Logger;
-    use tempfile::tempdir;
-
-    use super::{DEFAULT_PROJECT_NAME, derive_project_name, run};
-
-    fn paths_to_null_sep_bytes(file_paths: &[&Path]) -> Vec<u8> {
-        let mut output = Vec::new();
-        for path in file_paths {
-            output.extend(path.as_os_str().as_encoded_bytes());
-            output.push(0);
-        }
-        output
-    }
-
-    fn run_with_default_logger<R: Read, W: Write>(
-        input: R,
-        output: W,
-        root: &Path,
-        origin_base: &Path,
-        project_name: Option<&str>,
-    ) -> Result<(), Box<dyn std::error::Error>> {
-        let logger = Logger::default();
-        run(input, output, root, origin_base, project_name, logger)
-    }
-
-    #[test]
-    fn cli_with_empty_input_produces_empty_project_with_specified_project_name() {
-        let temp_dir = tempdir().unwrap();
-        let input = Cursor::new(b"");
-        let mut output = Vec::new();
-        let root = temp_dir.path();
-        let origin_base = temp_dir.path();
-
-        run_with_default_logger(input, &mut output, root, origin_base, Some("Project name"))
-            .unwrap();
-
-        assert_eq!(String::from_utf8(output).unwrap(), "# Project name\n");
-    }
-
-    #[test]
-    fn cli_reads_single_file_from_stdin() {
-        let temp_dir = tempdir().unwrap();
-        let origin_base = temp_dir.path();
-        let input = Cursor::new(b"test_main.rs\0");
-        let mut output = Vec::new();
-        let root = temp_dir.path();
-
-        fs::write(origin_base.join("test_main.rs"), "fn main() {}").unwrap();
-
-        run_with_default_logger(input, &mut output, root, origin_base, None).unwrap();
-
-        let output_str = String::from_utf8(output).unwrap();
-
-        assert!(output_str.contains("## File: test_main.rs"));
-        assert!(output_str.contains("fn main() {}"));
-    }
-
-    #[test]
-    fn cli_reads_multiple_files_in_order() {
-        let temp_dir = tempdir().unwrap();
-        let origin_base = temp_dir.path();
-        let input = Cursor::new(b"a.rs\0b.rs\0");
-        let mut output = Vec::new();
-        let root = temp_dir.path();
-
-        fs::write(origin_base.join("a.rs"), "A").unwrap();
-        fs::write(origin_base.join("b.rs"), "B").unwrap();
-
-        run_with_default_logger(input, &mut output, root, origin_base, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-
-        let a_pos = output.find("a.rs").unwrap();
-        let b_pos = output.find("b.rs").unwrap();
-
-        assert!(a_pos < b_pos);
-    }
-
-    #[test]
-    fn cli_normalizes_paths_before_rendering() {
-        let temp_dir = tempdir().unwrap();
-        let origin_base = temp_dir.path();
-        let input = Cursor::new(b"test/./main.rs\0");
-        let mut output = Vec::new();
-        let root = temp_dir.path();
-
-        let write_dir = temp_dir.path().join("test");
-        fs::create_dir_all(&write_dir).unwrap();
-        fs::write(write_dir.join("main.rs"), "fn main() {}").unwrap();
-
-        run_with_default_logger(input, &mut output, root, origin_base, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-
-        assert!(output.contains("## File: test/main.rs"));
-    }
-
-    #[test]
-    fn cli_reads_from_origin_but_outputs_relative_to_root() {
-        let temp_dir = tempdir().unwrap();
-        let origin_base = temp_dir.path().join("sandbox/src");
-        let input = Cursor::new(b"main.rs\0");
-        let mut output = Vec::new();
-        let root = temp_dir.path().join("project");
-
-        fs::create_dir_all(&origin_base).unwrap();
-        fs::write(origin_base.join("main.rs"), "fn main() {}").unwrap();
-
-        run_with_default_logger(input, &mut output, &root, &origin_base, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-
-        // Must contain file content → proves correct reading
-        assert!(output.contains("fn main() {}"));
-
-        // Must contain normalized path → proves normalization applied
-        assert!(output.contains("sandbox/src/main.rs"));
-    }
-
-    #[test]
-    fn cli_ignores_origin_when_input_path_is_absolute() {
-        let temp_dir1 = tempdir().unwrap();
-        let temp_dir2 = tempdir().unwrap();
-        let origin_base = temp_dir2.path();
-        let filepath = temp_dir1.path().join("test_main.rs");
-        let input = Cursor::new(paths_to_null_sep_bytes(&[&filepath]));
-        let mut output = Vec::new();
-        let root = temp_dir2.path();
-        fs::write(&filepath, "fn main() {}").unwrap();
-
-        run_with_default_logger(input, &mut output, root, origin_base, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-
-        // Must contain file content → proves correct reading
-        assert!(output.contains("fn main() {}"));
-    }
-
-    #[test]
-    fn duplicate_files_in_sequence_are_skipped() {
-        let temp_dir = tempdir().unwrap();
-        let origin = temp_dir.path();
-        let root = temp_dir.path();
-
-        fs::write(origin.join("a.rs"), "A").unwrap();
-
-        let input = Cursor::new(b"a.rs\0a.rs\0");
-        let mut output = Vec::new();
-
-        run_with_default_logger(input, &mut output, root, origin, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-
-        assert_eq!(output.matches("## File: a.rs").count(), 1);
-    }
-
-    #[test]
-    fn duplicate_files_are_skipped_with_preserved_display_order_even_if_not_adjacent() {
-        let temp_dir = tempdir().unwrap();
-        let origin = temp_dir.path();
-        let root = temp_dir.path();
-
-        fs::write(origin.join("a.rs"), "A").unwrap();
-        fs::write(origin.join("b.rs"), "B").unwrap();
-
-        let input = Cursor::new(b"a.rs\0b.rs\0a.rs\0");
-        let mut output = Vec::new();
-
-        run_with_default_logger(input, &mut output, root, origin, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-        assert_eq!(output.matches("## File: a.rs").count(), 1);
-        assert_eq!(output.matches("## File: b.rs").count(), 1);
-        let a_pos = output.find("a.rs").unwrap();
-        let b_pos = output.find("b.rs").unwrap();
-        assert!(a_pos < b_pos);
-    }
-
-    #[test]
-    fn lexically_equivalent_paths_are_detected_as_duplicates() {
-        let temp_dir = tempdir().unwrap();
-        let origin = temp_dir.path();
-        let root = temp_dir.path();
-
-        fs::create_dir_all(origin.join("bla")).unwrap();
-        fs::write(origin.join("a.rs"), "A").unwrap();
-        fs::write(origin.join("b.rs"), "B").unwrap();
-
-        let input = Cursor::new(b"a.rs\0b.rs\0bla/../a.rs\0");
-        let mut output = Vec::new();
-
-        run_with_default_logger(input, &mut output, root, origin, None).unwrap();
-
-        let output = String::from_utf8(output).unwrap();
-        assert_eq!(output.matches("## File: a.rs").count(), 1);
-    }
-
-    #[test]
-    fn project_name_is_derived_from_root_by_default_even_if_directory_does_not_exist() {
-        let temp_dir = tempdir().unwrap();
-        let origin_base = temp_dir.path();
-        let input = Cursor::new(b"");
-        let mut output = Vec::new();
-        let root = temp_dir.path().join("repo2markdown");
-
-        run_with_default_logger(input, &mut output, &root, origin_base, None).unwrap();
-
-        let output_str = String::from_utf8(output).unwrap();
-
-        assert_eq!(output_str, "# repo2markdown\n");
-    }
-
-    #[test]
-    fn project_name_fallsback_to_default_if_root_is_filesystem_root() {
-        assert_eq!(derive_project_name(Path::new("/")), DEFAULT_PROJECT_NAME);
-    }
-
-    #[test]
-    fn project_name_fallsback_if_root_ending_is_not_utf8() {
-        let root = Path::new(OsStr::from_bytes(b"/root/fd\xC3"));
-        assert_eq!(derive_project_name(root), DEFAULT_PROJECT_NAME);
-    }
-
-    #[test]
-    fn deriving_project_name_from_root_ignores_trailing_slash() {
-        let root = Path::new("/root/repo2markdown/");
-        assert_eq!(derive_project_name(root), "repo2markdown");
-    }
-}