From 1b189cf15c29bf57638bef77eaa6f632404f52ce Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Wed, 18 Oct 2023 19:26:04 -0400
Subject: [PATCH] Add very basic CLI.

---
 Cargo.lock  | 55 +++++++++++++++++++++++++++++++++++++++----
 Cargo.toml  |  3 ++-
 src/main.rs | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 118 insertions(+), 7 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index bbb68dc..d128ef8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -102,6 +102,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d04704f56c2cde07f43e8e2c154b43f216dc5c92fc98ada720177362f953b956"
 dependencies = [
  "clap_builder",
+ "clap_derive",
 ]
 
 [[package]]
@@ -113,7 +114,18 @@ dependencies = [
  "anstream",
  "anstyle",
  "clap_lex",
- "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0862016ff20d69b84ef8247369fabf5c008a7417002411897d40ee1f4532b873"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
@@ -134,6 +146,12 @@ version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6fb8d784f27acf97159b40fc4db5ecd8aa23b9ad5ef69cdd136d3bc80665f0c0"
 
+[[package]]
+name = "heck"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.3"
@@ -212,6 +230,24 @@ version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "134c189feb4956b20f6f547d2cf727d4c0fe06722b20a0eec87ed445a97f92da"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -228,10 +264,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "strsim"
-version = "0.10.0"
+name = "syn"
+version = "2.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+checksum = "e96b79aaa137db8f61e26363a0c9b47d8b4ec75da28b7d1d614c2303e232408b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
 
 [[package]]
 name = "tokio"
@@ -244,6 +285,12 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.1"
diff --git a/Cargo.toml b/Cargo.toml
index 2cd1c57..f871973 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-clap = "4.4.6"
+# TODO: maybe error-context, suggestions, usage | env
+clap = { version = "4.4.6", default-features = false, features = ["std", "color", "help", "derive"] }
 organic = "0.1.12"
 tokio = { version = "1.30.0", default-features = false, features = ["rt", "rt-multi-thread"] }
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..040230e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,66 @@
-fn main() {
-    println!("Hello, world!");
+use clap::Args;
+use clap::Parser;
+use clap::Subcommand;
+use std::path::PathBuf;
+use std::process::ExitCode;
+
+fn main() -> Result<ExitCode, Box<dyn std::error::Error>> {
+    let rt = tokio::runtime::Runtime::new()?;
+    rt.block_on(async {
+        let main_body_result = main_body().await;
+        main_body_result
+    })
+}
+
+async fn main_body() -> Result<ExitCode, Box<dyn std::error::Error>> {
+    let args = Cli::parse();
+    match args.command {
+        Commands::Init(_args) => {}
+        Commands::Build(_args) => {}
+        Commands::AddPost(_args) => {}
+    };
+    Ok(ExitCode::SUCCESS)
+}
+
+#[derive(Parser, Debug)]
+#[command(name = "Writer")]
+#[command(version = env!("CARGO_PKG_VERSION"))]
+#[command(about = "Generate a static site.", long_about = None)]
+#[command(propagate_version = true)]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Subcommand, Debug)]
+enum Commands {
+    /// Initialize an empty website folder.
+    Init(InitArgs),
+
+    /// Build the static site.
+    Build(BuildArgs),
+
+    /// Add a blog post to the site.
+    AddPost(BuildArgs),
+}
+
+#[derive(Args, Debug)]
+struct InitArgs {
+    /// Path where you want the initial writer structure to be located.
+    #[arg(short, long)]
+    path: PathBuf,
+}
+
+#[derive(Args, Debug)]
+struct BuildArgs {
+    /// Path to the writer config file.
+    #[arg(short, long)]
+    config: PathBuf,
+}
+
+#[derive(Args, Debug)]
+struct AddPostArgs {
+    /// Path to the writer config file.
+    #[arg(short, long)]
+    config: PathBuf,
 }