feat: add crunch init command

Signed-off-by: kjuulh <contact@kjuulh.io>

Cargo.lock

@@ -474,6 +474,31 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "crossterm"
+version = "0.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e64e6c0fbe2c17357405f7c758c1ef960fce08bdfb2c03d88d2a18d7e09c4b67"
+dependencies = [
+ "bitflags 1.3.2",
+ "crossterm_winapi",
+ "libc",
+ "mio",
+ "parking_lot",
+ "signal-hook",
+ "signal-hook-mio",
+ "winapi",
+]
+
+[[package]]
+name = "crossterm_winapi"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acdd7c62a3665c7f6830a51635d9ac9b23ed385797f70a83bb8bafe9c572ab2b"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "crunch"
 version = "0.1.0"
@@ -502,6 +527,8 @@ dependencies = [
  "clap",
  "crunch-codegen",
  "crunch-file",
+ "inquire",
+ "regex",
  "thiserror",
  "tokio",
  "tracing",
@@ -654,6 +681,12 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "dyn-clone"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23d2f3407d9a573d666de4b5bdf10569d73ca9478087346697dcbae6244bfbcd"
+
 [[package]]
 name = "ed25519"
 version = "1.5.3"
@@ -956,6 +989,22 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "inquire"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c33e7c1ddeb15c9abcbfef6029d8e29f69b52b6d6c891031b88ed91b5065803b"
+dependencies = [
+ "bitflags 1.3.2",
+ "crossterm",
+ "dyn-clone",
+ "lazy_static",
+ "newline-converter",
+ "thiserror",
+ "unicode-segmentation",
+ "unicode-width",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1080,6 +1129,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
 dependencies = [
  "libc",
+ "log",
  "wasi",
  "windows-sys",
 ]
@@ -1126,6 +1176,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "newline-converter"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f71d09d5c87634207f894c6b31b6a2b2c64ea3bdcf71bd5599fdbbe1600c00f"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "nkeys"
 version = "0.2.0"
@@ -1736,6 +1795,27 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "signal-hook"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8621587d4798caf8eb44879d42e56b9a93ea5dcd315a6487c357130095b62801"
+dependencies = [
+ "libc",
+ "signal-hook-registry",
+]
+
+[[package]]
+name = "signal-hook-mio"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
+dependencies = [
+ "libc",
+ "mio",
+ "signal-hook",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
@@ -2096,6 +2176,18 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51733f11c9c4f72aa0c160008246859e340b00807569a0da0e7a1079b27ba85"
+
 [[package]]
 name = "untrusted"
 version = "0.7.1"

Cargo.toml

@@ -32,5 +32,6 @@ tempfile = {version = "3.8.0"}
 genco = {version = "0.17.5"}
 walkdir = {version = "2.4.0"}
 regex = {version = "1.9.5"}
+inquire = {version = "0.6.2"}
 
 pretty_assertions = "1.4.0"

crates/crunch-cli/Cargo.toml

@@ -5,6 +5,10 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[[bin]]
+name = "crunch"
+path = "src/main.rs"
+
 [dependencies]
 crunch-file.workspace = true
 crunch-codegen.workspace = true
@@ -16,3 +20,5 @@ thiserror.workspace = true
 async-trait.workspace = true
 tracing-subscriber.workspace = true
 clap.workspace = true
+inquire.workspace = true
+regex.workspace = true

crates/crunch-cli/src/main.rs

@@ -4,7 +4,10 @@ use std::path::PathBuf;
 
 use anyhow::anyhow;
 use clap::{Args, Parser, Subcommand};
+use inquire::validator::Validation;
 use logging::LogArg;
+use regex::Regex;
+use tokio::io::AsyncWriteExt;
 
 #[derive(Parser, Clone)]
 #[command(author, version, about, long_about = None, subcommand_required = true)]
@@ -19,6 +22,7 @@ struct Cli {
 #[derive(Subcommand, Clone)]
 enum Commands {
     Generate {},
+    Init {},
 }
 
 #[derive(Args, Clone)]
@@ -69,6 +73,72 @@ async fn main() -> anyhow::Result<()> {
                 }
             }
         }
+        Commands::Init {} => {
+            match config::get_file(&cli.global_args.crunch_file).await {
+                Ok(_) => anyhow::bail!("config file already exists"),
+                Err(_) => {}
+            }
+
+            let path = &cli.global_args.crunch_file;
+            let file_name = path
+                .file_name()
+                .ok_or(anyhow::anyhow!("not a valid file name"))?;
+            if file_name != ".crunch.toml" {
+                anyhow::bail!("--crunch-file always has to end with file: .crunch.toml");
+            }
+            if let Some(dir) = path.parent() {
+                if !dir.exists() {
+                    tokio::fs::create_dir_all(dir).await?;
+                }
+            }
+
+            fn validate_text(
+                text: &str,
+            ) -> Result<Validation, Box<dyn std::error::Error + Send + Sync + 'static>>
+            {
+                let regex = Regex::new("^[a-z0-9-_]+$").expect("is required to be valid regex");
+                if regex.is_match(text) {
+                    Ok(Validation::Valid)
+                } else {
+                    Ok(Validation::Invalid(
+                        "a service name can only contain lowercase letter, numbers, - and _".into(),
+                    ))
+                }
+            }
+
+            let service = inquire::Text::new("service")
+                .with_help_message("please insert your service name")
+                .with_validator(validate_text)
+                .prompt()?;
+            let domain = inquire::Text::new("domain")
+                .with_help_message("please insert your domain")
+                .with_validator(validate_text)
+                .prompt()?;
+            let codegen = inquire::MultiSelect::new("codegen", vec!["rust", "go"])
+                .with_help_message("which types of client code should be generated for you?")
+                .prompt()?;
+
+            let mut crunch_file = tokio::fs::File::create(path).await?;
+            crunch_file
+                .write_all(
+                    format!(
+                        r#"[service]
+service = "{service}"
+domain = "{domain}"
+codegen = [{}]
+"#,
+                        codegen
+                            .iter()
+                            .map(|c| format!(r#""{c}""#))
+                            .collect::<Vec<_>>()
+                            .join(", ")
+                    )
+                    .as_bytes(),
+                )
+                .await?;
+
+            println!("Success! generated file at: {}", path.display());
+        }
     }
 
     Ok(())