Shell autocomplete

Cargo.toml

@@ -15,6 +15,7 @@ categories = ["command-line-utilities", "science"]
 [dependencies]
 clap = { version = "4.5.21", features = ["derive", "env"] }
 clap-verbosity-flag = "3.0.1"
+clap_complete = { version = "4.5.38", features = ["unstable-dynamic"] }
 console = "0.15.8"
 env_logger = "0.11.5"
 home = "0.5.9"

doc/src/guide/install.md

@@ -58,3 +58,22 @@ cargo install --path row --locked
 ```
 
 Ensure that `$HOME/.cargo/bin` is on your `$PATH`.
+
+## Configuring shell autocompletion
+
+Execute the appropriate command in your shell's profile:
+* Bash:
+   ```shell
+   source <(COMPLETE=bash row)
+   ```
+* Fish:
+    ```shell
+    source (COMPLETE=fish row | psub)
+    ```
+* Zsh:
+    ```shell
+    source <(COMPLETE=zsh row)
+    ```
+For additional shell configurations, see [clap-complete's documentation].
+
+[clap-complete's documentation]: https://docs.rs/clap_complete/latest/clap_complete/env/index.html

doc/src/release-notes.md

@@ -4,6 +4,18 @@
 
 *Highlights:*
 
+**Row** 0.4 expands the `command` templating functionality to improve support for
+command line applications as actions. This removes the need for _shim_ scripts that
+access the workspace path and/or directory values before invoking a subprocess.
+`{workspace_path}` expands to the current project's workspace path and `{/JSON pointer}`
+expands to the value of the given JSON pointer for the directory acted on.
+
+**Row** 0.4 also adds _shell autocompletion_. To enable, execute the appropriate
+command in your shell's profile:
+* Bash: `source <(COMPLETE=bash row)`
+* Fish: `source (COMPLETE=fish row | psub)`
+* Zsh: `source <(COMPLETE=zsh row)`
+
 *Added:*
 
 * In job scripts, set the environment variable `ACTION_WORKSPACE_PATH` to the _relative_
@@ -12,6 +24,7 @@
   _relative_ path to the current workspace.
 * `{/JSON pointer}` template parameter in `action.command` - replaced with the portion
   of the directory's value referenced by the given JSON pointer.
+* Shell autocomplete.
 
 *Fixed:*
 

src/cli.rs

@@ -1,6 +1,7 @@
 // Copyright (c) 2024 The Regents of the University of Michigan.
 // Part of row, released under the BSD 3-Clause License.
 
+pub mod autocomplete;
 pub mod clean;
 pub mod cluster;
 pub mod directories;
@@ -11,6 +12,7 @@ pub mod status;
 pub mod submit;
 
 use clap::{Args, Parser, Subcommand, ValueEnum};
+use clap_complete::ArgValueCandidates;
 use clap_verbosity_flag::{Verbosity, WarnLevel};
 use log::trace;
 use std::io;
@@ -50,7 +52,8 @@ pub struct GlobalOptions {
     /// Check the job submission status on the given cluster.
     ///
     /// Autodetected by default.
-    #[arg(long, global = true, env = "ROW_CLUSTER", display_order = 2)]
+    #[arg(long, global = true, env = "ROW_CLUSTER", display_order = 2,
+        add=ArgValueCandidates::new(autocomplete::get_cluster_candidates))]
     cluster: Option<String>,
 }
 

src/cli/autocomplete.rs

@@ -0,0 +1,55 @@
+// Copyright (c) 2024 The Regents of the University of Michigan.
+// Part of row, released under the BSD 3-Clause License.
+
+use clap_complete::CompletionCandidate;
+use indicatif::{MultiProgress, ProgressDrawTarget};
+
+use row::workflow::Workflow;
+use row::MultiProgressContainer;
+use row::{cluster, workspace};
+
+/// List the actions in the current workflow.
+pub fn get_action_candidates() -> Vec<CompletionCandidate> {
+    let Ok(workflow) = Workflow::open() else {
+        return Vec::new();
+    };
+
+    workflow
+        .action
+        .into_iter()
+        .map(|a| CompletionCandidate::new(a.name()))
+        .collect()
+}
+
+/// List the clusters in the user's configuration
+pub fn get_cluster_candidates() -> Vec<CompletionCandidate> {
+    let Ok(clusters) = cluster::Configuration::open() else {
+        return Vec::new();
+    };
+
+    clusters
+        .cluster
+        .into_iter()
+        .map(|a| CompletionCandidate::new(a.name))
+        .collect()
+}
+
+/// List the directories in the project's workspace
+pub fn get_directory_candidates() -> Vec<CompletionCandidate> {
+    let multi_progress = MultiProgress::with_draw_target(ProgressDrawTarget::hidden());
+    let mut multi_progress_container = MultiProgressContainer::new(multi_progress.clone());
+
+    let Ok(workflow) = Workflow::open() else {
+        return Vec::new();
+    };
+
+    let Ok(directories) = workspace::list_directories(&workflow, &mut multi_progress_container)
+    else {
+        return Vec::new();
+    };
+
+    directories
+        .into_iter()
+        .map(CompletionCandidate::new)
+        .collect()
+}

src/cli/directories.rs

@@ -2,14 +2,15 @@
 // Part of row, released under the BSD 3-Clause License.
 
 use clap::Args;
+use clap_complete::ArgValueCandidates;
 use console::Style;
 use log::{debug, warn};
 use std::collections::HashSet;
 use std::error::Error;
 use std::io::Write;
 use std::path::PathBuf;
 
-use crate::cli::{self, GlobalOptions};
+use crate::cli::{self, autocomplete, GlobalOptions};
 use crate::ui::{Alignment, Item, Row, Table};
 use row::project::Project;
 use row::MultiProgressContainer;
@@ -18,10 +19,12 @@ use row::MultiProgressContainer;
 #[allow(clippy::struct_excessive_bools)]
 pub struct Arguments {
     /// Select directories to summarize (defaults to all). Use 'show directories -' to read from stdin.
+    #[arg(add=ArgValueCandidates::new(autocomplete::get_directory_candidates))]
     directories: Vec<PathBuf>,
 
     /// Select directories that are included by the provided action.
-    #[arg(long, short, display_order = 0)]
+    #[arg(long, short, display_order = 0,
+        add=ArgValueCandidates::new(autocomplete::get_action_candidates))]
     action: Option<String>,
 
     /// Hide the table header.

src/cli/init.rs

@@ -2,6 +2,7 @@
 // Part of row, released under the BSD 3-Clause License.
 
 use clap::Args;
+use clap_complete::ValueHint;
 use log::{debug, info, trace, warn};
 use path_absolutize::Absolutize;
 use std::fmt::Write as _;
@@ -23,7 +24,7 @@ pub struct Arguments {
     workspace: String,
 
     /// Directory to initialize.
-    #[arg(display_order = 0)]
+    #[arg(display_order = 0, value_hint=ValueHint::DirPath)]
     directory: PathBuf,
 }
 

src/cli/scan.rs

@@ -2,14 +2,15 @@
 // Part of row, released under the BSD 3-Clause License.
 
 use clap::Args;
+use clap_complete::ArgValueCandidates;
 use log::{debug, info, trace, warn};
 use postcard;
 use std::fs::{self, File};
 use std::io::prelude::*;
 use std::path::PathBuf;
 use uuid::Uuid;
 
-use crate::cli::{self, GlobalOptions};
+use crate::cli::{self, autocomplete, GlobalOptions};
 use row::workflow::Workflow;
 use row::{
     workspace, Error, MultiProgressContainer, COMPLETED_DIRECTORY_NAME, DATA_DIRECTORY_NAME,
@@ -18,10 +19,12 @@ use row::{
 #[derive(Args, Debug)]
 pub struct Arguments {
     /// Select the action to scan (defaults to all).
-    #[arg(short, long, display_order = 0)]
+    #[arg(short, long, display_order = 0,
+        add=ArgValueCandidates::new(autocomplete::get_action_candidates))]
     action: Option<String>,
 
     /// Select directories to scan (defaults to all). Use 'scan -' to read from stdin.
+    #[arg(add=ArgValueCandidates::new(autocomplete::get_directory_candidates))]
     directories: Vec<PathBuf>,
 }
 

src/cli/status.rs

@@ -2,6 +2,7 @@
 // Part of row, released under the BSD 3-Clause License.
 
 use clap::Args;
+use clap_complete::ArgValueCandidates;
 use console::Style;
 use indicatif::HumanCount;
 use log::{debug, trace, warn};
@@ -10,7 +11,7 @@ use std::io::Write;
 use std::path::PathBuf;
 use wildmatch::WildMatch;
 
-use crate::cli::{self, GlobalOptions};
+use crate::cli::{self, autocomplete, GlobalOptions};
 use crate::ui::{Alignment, Item, Row, Table};
 use row::project::{Project, Status};
 use row::workflow::ResourceCost;
@@ -20,14 +21,16 @@ use row::MultiProgressContainer;
 #[derive(Args, Debug)]
 pub struct Arguments {
     /// Select the actions to summarize with a wildcard pattern.
-    #[arg(short, long, value_name = "pattern", default_value_t=String::from("*"), display_order=0)]
+    #[arg(short, long, value_name = "pattern", default_value_t=String::from("*"), display_order=0,
+        add=ArgValueCandidates::new(autocomplete::get_action_candidates))]
     action: String,
 
     /// Hide the table header.
     #[arg(long, display_order = 0)]
     no_header: bool,
 
     /// Select directories to summarize (defaults to all). Use 'status -' to read from stdin.
+    #[arg(add=ArgValueCandidates::new(autocomplete::get_directory_candidates))]
     directories: Vec<PathBuf>,
 
     /// Show actions with completed directories.

src/cli/submit.rs

@@ -2,6 +2,7 @@
 // Part of row, released under the BSD 3-Clause License.
 
 use clap::Args;
+use clap_complete::ArgValueCandidates;
 use console::style;
 use indicatif::HumanCount;
 use log::{debug, info, trace, warn};
@@ -17,7 +18,7 @@ use std::sync::Arc;
 use std::time::Instant;
 use wildmatch::WildMatch;
 
-use crate::cli::GlobalOptions;
+use crate::cli::{autocomplete, GlobalOptions};
 use row::format::HumanDuration;
 use row::project::Project;
 use row::workflow::{Action, ResourceCost};
@@ -26,10 +27,12 @@ use row::MultiProgressContainer;
 #[derive(Args, Debug)]
 pub struct Arguments {
     /// Select the actions to summarize with a wildcard pattern.
-    #[arg(short, long, value_name = "pattern", default_value_t=String::from("*"), display_order=0)]
+    #[arg(short, long, value_name = "pattern", default_value_t=String::from("*"), display_order=0,
+        add=ArgValueCandidates::new(autocomplete::get_action_candidates))]
     action: String,
 
     /// Select directories to summarize (defaults to all).
+    #[arg(add=ArgValueCandidates::new(autocomplete::get_directory_candidates))]
     directories: Vec<PathBuf>,
 
     /// Skip confirmation check.

src/main.rs

@@ -3,7 +3,8 @@
 
 #![warn(clippy::pedantic)]
 
-use clap::Parser;
+use clap::{CommandFactory, Parser};
+use clap_complete::env::CompleteEnv;
 use clap_verbosity_flag::log::LevelFilter;
 use indicatif::{MultiProgress, ProgressDrawTarget};
 use indicatif_log_bridge::LogWrapper;
@@ -23,6 +24,11 @@ use ui::MultiProgressWriter;
 
 fn main_detail() -> Result<(), Box<dyn Error>> {
     let instant = Instant::now();
+
+    // Autocomplete
+    CompleteEnv::with_factory(Options::command).complete();
+
+    // Normal execution
     let options = Options::parse();
 
     let log_style;