Add PrefetchCmd - not yet implemented

Summary:
# This Diff

Add PrefetchCmd - not yet implemented

# Context

We are doing some Oxidation (Python->Rust) migration of the EdenFS CLI. This is an ongoing BE activity that will complete when all CLI commands have been moved.

Reviewed By: genevievehelsel

Differential Revision: D75483516

fbshipit-source-id: e24d0bf6019c9ef33a1f5cdf5bcbc8a3218c6eb3

Author: jdelliot

eden/fs/cli_rs/edenfs-commands/src/glob_and_prefetch.rs

@@ -7,5 +7,7 @@
 
 mod common;
 pub mod glob;
+pub mod prefetch;
 
 pub use glob::*;
+pub use prefetch::*;

eden/fs/cli_rs/edenfs-commands/src/glob_and_prefetch/prefetch.rs

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This software may be used and distributed according to the terms of the
+ * GNU General Public License version 2.
+ */
+
+//! edenfsctl glob
+
+use std::path::PathBuf;
+
+use anyhow::Context;
+use anyhow::Result;
+use async_trait::async_trait;
+use clap::Parser;
+use edenfs_client::glob_files::Glob;
+use edenfs_client::utils::locate_repo_root;
+
+use crate::ExitCode;
+use crate::get_edenfs_instance;
+use crate::glob_and_prefetch::common::CommonArgs;
+
+#[derive(Parser, Debug)]
+#[clap(
+    about = "Prefetch content for matching file patterns. Glob patterns can be provided via a pattern file. This command does not do any filtering based on source control state or gitignore files."
+)]
+pub struct PrefetchCmd {
+    #[clap(flatten)]
+    common: CommonArgs,
+
+    #[clap(
+        long,
+        help = "DEPRECATED: Do not print the names of the matching files"
+    )]
+    silent: bool,
+
+    #[clap(long, help = "Do not prefetch files; only prefetch directories")]
+    directories_only: bool,
+
+    #[clap(long, help = "Run the prefetch in the background")]
+    background: bool,
+
+    #[clap(
+        long,
+        help = "Print the paths being prefetched. Does not work if using --background"
+    )]
+    debug_print: bool,
+}
+
+impl PrefetchCmd {
+    fn _print_result(&self, _result: &Glob) -> Result<()> {
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl crate::Subcommand for PrefetchCmd {
+    async fn run(&self) -> Result<ExitCode> {
+        // TODO: add in telemetry support
+        let instance = get_edenfs_instance();
+        let _client = instance.get_client();
+
+        // Get cwd mount_point if not provided.
+        let current_dir: PathBuf;
+        let mount_point = match &self.common.mount_point {
+            Some(ref mount_point) => mount_point,
+            None => {
+                current_dir = std::env::current_dir()
+                    .context("Unable to retrieve current working directory")?;
+                &current_dir
+            }
+        };
+
+        // Get mount_point as just repo root
+        let _repo_root = locate_repo_root(mount_point);
+
+        // Load patterns
+        let _patterns = self.common.load_patterns()?;
+
+        // TODO: invoke prefetch or glob based on params and fallback
+
+        Ok(0)
+    }
+}

eden/fs/cli_rs/edenfs-commands/src/lib.rs

@@ -25,6 +25,8 @@ use hg_util::path::expand_path;
 use tracing::Level;
 use tracing::event;
 
+use crate::gc::GcCmd;
+
 mod config;
 mod debug;
 mod du;
@@ -48,7 +50,7 @@ mod util;
 
 // Used to determine whether we should gate off certain oxidized edenfsctl commands
 const ROLLOUT_JSON: &str = "edenfsctl_rollout.json";
-const EXPERIMENTAL_COMMANDS: &[&str] = &["glob", "remove"];
+const EXPERIMENTAL_COMMANDS: &[&str] = &["glob", "prefetch", "remove"];
 
 // We create a single EdenFsInstance when starting up
 static EDENFS_INSTANCE: OnceLock<EdenFsInstance> = OnceLock::new();
@@ -154,6 +156,7 @@ pub enum TopLevelSubcommand {
     #[cfg(target_os = "macos")]
     FileAccessMonitor(crate::file_access_monitor::FileAccessMonitorCmd),
     Glob(crate::glob_and_prefetch::GlobCmd),
+    Prefetch(crate::glob_and_prefetch::PrefetchCmd),
 }
 
 impl TopLevelSubcommand {
@@ -183,6 +186,7 @@ impl TopLevelSubcommand {
             #[cfg(target_os = "macos")]
             FileAccessMonitor(cmd) => cmd,
             Glob(cmd) => cmd,
+            Prefetch(cmd) => cmd,
         }
     }
 
@@ -212,6 +216,7 @@ impl TopLevelSubcommand {
             #[cfg(target_os = "macos")]
             TopLevelSubcommand::FileAccessMonitor(_) => "file-access-monitor",
             TopLevelSubcommand::Glob(_) => "glob",
+            TopLevelSubcommand::Prefetch(_) => "prefetch",
         }
     }
 }