feat: add mcfly shell history importer

Adds direct SQLite database import support for mcfly shell history.
Reads from mcfly's history.db without requiring mcfly binary in PATH.

Implementation:
- Direct SQLite database access via sqlx
- Cross-platform database path detection
- Imports complete command history from commands table
- Session ID mapping with UUID generation
- Hostname support with username information
- Custom database file path support via --file option
- Full test coverage with real database validation

Database locations:
- ~/.mcfly/history.db (legacy)
- ~/.local/share/mcfly/history.db (XDG default)
- $XDG_DATA_HOME/mcfly/history.db
- ~/Library/Application Support/McFly/history.db (macOS)
- %LOCALAPPDATA%\McFly\data\history.db (Windows)

Usage: atuin import mcfly [--file <path>]

🤖 Generated with Claude Code

Co-Authored-By: Claude <[email protected]>
Signed-off-by: Lucas Zampieri <[email protected]>

Author: zampierilucas

crates/atuin-client/src/import/mcfly.rs

@@ -0,0 +1,331 @@
+use std::collections::HashMap;
+use std::path::PathBuf;
+
+use async_trait::async_trait;
+use atuin_common::utils::uuid_v7;
+use directories::UserDirs;
+use eyre::{Result, eyre};
+use sqlx::sqlite::SqlitePool;
+use time::OffsetDateTime;
+
+use super::{Importer, Loader};
+use crate::history::History;
+use crate::utils::{get_hostname, get_username};
+
+#[derive(sqlx::FromRow, Debug)]
+struct McflyCommand {
+    cmd: String,
+    session_id: String,
+    when_run: i64,
+    exit_code: i64,
+    dir: String,
+}
+
+#[derive(Debug)]
+pub struct Mcfly {
+    entries: Vec<History>,
+}
+
+impl Mcfly {
+    /// Find mcfly database path following mcfly's logic
+    pub fn histpath() -> Result<PathBuf> {
+        // Check for legacy path first (~/.mcfly/history.db)
+        if let Some(user_dirs) = UserDirs::new() {
+            let legacy_path = user_dirs.home_dir().join(".mcfly").join("history.db");
+            if legacy_path.exists() {
+                return Ok(legacy_path);
+            }
+        }
+
+        // Use XDG data directory on Linux/Unix
+        if let Ok(xdg_data_home) = std::env::var("XDG_DATA_HOME") {
+            let path = PathBuf::from(xdg_data_home)
+                .join("mcfly")
+                .join("history.db");
+            if path.exists() {
+                return Ok(path);
+            }
+        }
+
+        // Default XDG location (~/.local/share/mcfly/history.db)
+        if let Some(user_dirs) = UserDirs::new() {
+            let default_path = user_dirs
+                .home_dir()
+                .join(".local")
+                .join("share")
+                .join("mcfly")
+                .join("history.db");
+            if default_path.exists() {
+                return Ok(default_path);
+            }
+        }
+
+        // macOS
+        if cfg!(target_os = "macos")
+            && let Some(user_dirs) = UserDirs::new()
+        {
+            let macos_path = user_dirs
+                .home_dir()
+                .join("Library")
+                .join("Application Support")
+                .join("McFly")
+                .join("history.db");
+            if macos_path.exists() {
+                return Ok(macos_path);
+            }
+        }
+
+        // Windows
+        if cfg!(target_os = "windows")
+            && let Ok(local_data) = std::env::var("LOCALAPPDATA")
+        {
+            let windows_path = PathBuf::from(local_data)
+                .join("McFly")
+                .join("data")
+                .join("history.db");
+            if windows_path.exists() {
+                return Ok(windows_path);
+            }
+        }
+
+        Err(eyre!(
+            "Could not find mcfly database. Searched common locations but no history.db found."
+        ))
+    }
+
+    /// Import from mcfly database directly
+    async fn from_db(db_path: PathBuf) -> Result<Self> {
+        let db_url = format!("sqlite://{}", db_path.to_string_lossy());
+        let pool = SqlitePool::connect(&db_url).await.map_err(|e| {
+            eyre!(
+                "Failed to connect to mcfly database at {}: {}",
+                db_path.display(),
+                e
+            )
+        })?;
+
+        Self::from_pool(pool).await
+    }
+
+    /// Import from mcfly database at specific path
+    pub async fn from_file<P: AsRef<std::path::Path>>(db_path: P) -> Result<Self> {
+        let path = db_path.as_ref().to_path_buf();
+        if !path.exists() {
+            return Err(eyre!("mcfly database not found at: {}", path.display()));
+        }
+        Self::from_db(path).await
+    }
+
+    async fn from_pool(pool: SqlitePool) -> Result<Self> {
+        let commands: Vec<McflyCommand> = sqlx::query_as(
+            "SELECT cmd, session_id, when_run, exit_code, dir FROM commands
+             WHERE cmd IS NOT NULL AND cmd != ''
+             ORDER BY when_run",
+        )
+        .fetch_all(&pool)
+        .await
+        .map_err(|e| eyre!("Failed to query mcfly commands: {}", e))?;
+
+        let mut session_map = HashMap::new();
+        let hostname = format!("{}:{}", get_hostname(), get_username());
+
+        let entries = commands
+            .into_iter()
+            .map(|cmd| {
+                let timestamp = OffsetDateTime::from_unix_timestamp(cmd.when_run)
+                    .unwrap_or_else(|_| OffsetDateTime::now_utc());
+
+                // Map session_id to UUID, creating new ones as needed
+                let session = session_map
+                    .entry(cmd.session_id.clone())
+                    .or_insert_with(uuid_v7);
+
+                History::import()
+                    .timestamp(timestamp)
+                    .command(cmd.cmd)
+                    .cwd(cmd.dir)
+                    .exit(cmd.exit_code)
+                    .session(session.as_simple().to_string())
+                    .hostname(hostname.clone())
+                    .build()
+                    .into()
+            })
+            .collect();
+
+        Ok(Self { entries })
+    }
+}
+
+#[async_trait]
+impl Importer for Mcfly {
+    const NAME: &'static str = "mcfly";
+
+    async fn new() -> Result<Self> {
+        let db_path = Self::histpath()?;
+        Self::from_db(db_path).await
+    }
+
+    async fn entries(&mut self) -> Result<usize> {
+        Ok(self.entries.len())
+    }
+
+    async fn load(self, h: &mut impl Loader) -> Result<()> {
+        for entry in self.entries {
+            h.push(entry).await?;
+        }
+
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::import::tests::TestLoader;
+    use sqlx::SqlitePool;
+
+    async fn setup_test_db() -> Result<SqlitePool> {
+        let pool = SqlitePool::connect(":memory:").await?;
+
+        // Create mcfly commands table with real schema including session_id
+        sqlx::query(
+            r#"
+            CREATE TABLE commands (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                cmd TEXT NOT NULL,
+                session_id TEXT NOT NULL,
+                when_run INTEGER NOT NULL,
+                exit_code INTEGER NOT NULL,
+                dir TEXT NOT NULL
+            )
+            "#,
+        )
+        .execute(&pool)
+        .await?;
+
+        // Insert test data with timestamps, exit codes, and session IDs
+        sqlx::query("INSERT INTO commands (cmd, session_id, when_run, exit_code, dir) VALUES (?, ?, ?, ?, ?)")
+            .bind("ls -la")
+            .bind("session1")
+            .bind(1672574400) // 2023-01-01 12:00:00 UTC
+            .bind(0)
+            .bind("/home/user")
+            .execute(&pool)
+            .await?;
+
+        sqlx::query("INSERT INTO commands (cmd, session_id, when_run, exit_code, dir) VALUES (?, ?, ?, ?, ?)")
+            .bind("cd /tmp")
+            .bind("session1")
+            .bind(1672574410) // 10 seconds later
+            .bind(0)
+            .bind("/home/user")
+            .execute(&pool)
+            .await?;
+
+        sqlx::query("INSERT INTO commands (cmd, session_id, when_run, exit_code, dir) VALUES (?, ?, ?, ?, ?)")
+            .bind("false") // command that fails
+            .bind("session2")
+            .bind(1672574420) // 20 seconds later
+            .bind(1)
+            .bind("/tmp")
+            .execute(&pool)
+            .await?;
+
+        Ok(pool)
+    }
+
+    #[tokio::test]
+    async fn test_mcfly_db_import() -> Result<()> {
+        let pool = setup_test_db().await?;
+        let mcfly = Mcfly::from_pool(pool).await?;
+        let mut loader = TestLoader::default();
+
+        mcfly.load(&mut loader).await?;
+
+        // Should import all commands from commands table
+        assert_eq!(loader.buf.len(), 3);
+
+        // Check first command
+        assert_eq!(loader.buf[0].command, "ls -la");
+        assert_eq!(loader.buf[0].cwd.as_str(), "/home/user");
+        assert_eq!(loader.buf[0].exit, 0);
+
+        // Check last command (failed command)
+        assert_eq!(loader.buf[2].command, "false");
+        assert_eq!(loader.buf[2].cwd.as_str(), "/tmp");
+        assert_eq!(loader.buf[2].exit, 1);
+
+        Ok(())
+    }
+
+    #[tokio::test]
+    async fn test_mcfly_db_with_missing_fields() -> Result<()> {
+        let pool = SqlitePool::connect(":memory:").await?;
+
+        // Create commands table with session_id field
+        sqlx::query(
+            r#"
+            CREATE TABLE commands (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                cmd TEXT NOT NULL,
+                session_id TEXT NOT NULL,
+                when_run INTEGER NOT NULL,
+                exit_code INTEGER NOT NULL,
+                dir TEXT NOT NULL
+            )
+            "#,
+        )
+        .execute(&pool)
+        .await?;
+
+        sqlx::query("INSERT INTO commands (cmd, session_id, when_run, exit_code, dir) VALUES (?, ?, ?, ?, ?)")
+            .bind("pwd")
+            .bind("session3")
+            .bind(1672574400)
+            .bind(0)
+            .bind("/home/test")
+            .execute(&pool)
+            .await?;
+
+        let mcfly = Mcfly::from_pool(pool).await?;
+        let mut loader = TestLoader::default();
+
+        mcfly.load(&mut loader).await?;
+
+        assert_eq!(loader.buf.len(), 1);
+        assert_eq!(loader.buf[0].command, "pwd");
+        assert_eq!(loader.buf[0].cwd.as_str(), "/home/test");
+
+        Ok(())
+    }
+
+    #[tokio::test]
+    async fn test_empty_mcfly_db() -> Result<()> {
+        let pool = SqlitePool::connect(":memory:").await?;
+
+        // Create empty commands table with session_id field
+        sqlx::query(
+            r#"
+            CREATE TABLE commands (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                cmd TEXT NOT NULL,
+                session_id TEXT NOT NULL,
+                when_run INTEGER NOT NULL,
+                exit_code INTEGER NOT NULL,
+                dir TEXT NOT NULL
+            )
+            "#,
+        )
+        .execute(&pool)
+        .await?;
+
+        let mcfly = Mcfly::from_pool(pool).await?;
+        let mut loader = TestLoader::default();
+
+        mcfly.load(&mut loader).await?;
+
+        assert_eq!(loader.buf.len(), 0);
+
+        Ok(())
+    }
+}

crates/atuin-client/src/import/mod.rs

@@ -10,6 +10,7 @@ use crate::history::History;
 
 pub mod bash;
 pub mod fish;
+pub mod mcfly;
 pub mod nu;
 pub mod nu_histdb;
 pub mod replxx;