Consolidate cli.rs into main.rs (#279)

Author: uncenter

Diff for: src/cli.rs

@@ -4,20 +4,53 @@
 
 #![warn(missing_docs, clippy::missing_errors_doc, clippy::missing_panics_doc)]
 
+use crate::config::{ColorMode, Config, DisplayMode};
+use crate::display::DisplayHarness;
+use gfold::RepositoryCollector;
+
+use clap::Parser;
 use env_logger::Builder;
-use log::debug;
-use log::LevelFilter;
+use log::{debug, LevelFilter};
 use std::env;
 
-use crate::cli::CliHarness;
-
-mod cli;
 mod config;
 mod display;
 
-/// Initializes the logger based on the debug flag and `RUST_LOG` environment variable and uses
-/// the [`CliHarness`] to generate a [`Config`](config::Config). Then, this calls
-/// [`CliHarness::run()`].
+const HELP: &str = "\
+More information: https://github.com/nickgerace/gfold
+
+Description: this application helps you keep track of multiple Git repositories via CLI. By default, it displays relevant information for all repos in the current working directory.
+
+Config File Usage: while CLI options are prioritized, default options will fallback to the config file if it exists. Here are the config file lookup locations:
+
+    $XDG_CONFIG_HOME/gfold.toml
+    $XDG_CONFIG_HOME/gfold/config.toml
+    $HOME/.config/gfold.toml (or {{FOLDERID_Profile}}\\.config\\gfold.toml on Windows)
+
+Troubleshooting: investigate unexpected behavior by prepending execution with \"RUST_BACKTRACE=1\"and \"RUST_LOG=debug\". You can adjust those variable's values to aid investigation.";
+
+#[derive(Parser)]
+#[command(version, about = HELP, long_about = None)]
+struct Cli {
+    /// specify path to target directory (defaults to current working directory)
+    pub path: Option<String>,
+
+    #[arg(short, long)]
+    pub color_mode: Option<ColorMode>,
+    #[arg(short, long)]
+    pub display_mode: Option<DisplayMode>,
+
+    /// display finalized config options and exit (merged options from an optional config file and command line arguments)
+    #[arg(long)]
+    pub dry_run: bool,
+    /// ignore config file settings
+    #[arg(short, long)]
+    pub ignore_config_file: bool,
+}
+
+/// Initializes the logger based on the debug flag and `RUST_LOG` environment variable, then
+/// parses CLI arguments and generates a [`Config`](config::Config) by merging configurations as needed,
+/// and finally collects results and displays them.
 fn main() -> anyhow::Result<()> {
     if env::var("RUST_LOG").is_err() {
         Builder::new().filter_level(LevelFilter::Off).init();
@@ -26,7 +59,37 @@ fn main() -> anyhow::Result<()> {
     }
     debug!("initialized logger");
 
-    let cli_harness = CliHarness::new();
-    cli_harness.run()?;
+    let cli = Cli::parse();
+    let mut config = if cli.ignore_config_file {
+        Config::try_config_default()?
+    } else {
+        Config::try_config()?
+    };
+    debug!("loaded initial config");
+
+    if let Some(found_display_mode_raw) = &cli.display_mode {
+        config.display_mode = *found_display_mode_raw;
+    }
+    if let Some(found_color_mode) = &cli.color_mode {
+        config.color_mode = *found_color_mode;
+    }
+    if let Some(found_path) = &cli.path {
+        config.path = env::current_dir()?.join(found_path).canonicalize()?;
+    }
+    debug!("finalized config options");
+
+    if cli.dry_run {
+        config.print()?;
+    } else {
+        let (include_email, include_submodules) = match config.display_mode {
+            DisplayMode::Classic => (false, false),
+            DisplayMode::Json => (true, true),
+            DisplayMode::Standard | DisplayMode::StandardAlphabetical => (true, false),
+        };
+        let repository_collection =
+            RepositoryCollector::run(&config.path, include_email, include_submodules)?;
+        let display_harness = DisplayHarness::new(config.display_mode, config.color_mode);
+        display_harness.run(&repository_collection)?;
+    }
     Ok(())
 }