Y2j

build.ps1

@@ -25,7 +25,7 @@ else {
 }
 
 $windows_projects = @("ntreg","ntstatuserror","ntuserinfo","registry")
-$projects = @("config") 
+$projects = @("config","y2j") 
 if ($IsWindows) {
     $projects += $windows_projects
 }

y2j/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "y2j"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+atty = { version = "0.2" }
+serde_json = { version = "1.0", features = ["preserve_order"] }
+serde_yaml = { version = "0.9" }

y2j/README.md

@@ -0,0 +1,26 @@
+# Y2J
+
+Simple tool to convert YAML -> JSON -> YAML making it easier to read by a person.
+
+## Input
+
+This command has no parameters and takes input only via STDIN (as UTF-8).
+
+If the input is JSON, then it outputs YAML.
+If the input is YAML, then it outputs pretty JSON.
+
+JSON input is expected to be a single JSON document.
+
+## Example
+
+Get the JSON schema for registry resource as YAML:
+
+```powershell
+registry schema | y2j
+```
+
+Convert back to JSON to get pretty print JSON:
+
+```powershell
+registry schema | y2j | y2j
+```

y2j/src/main.rs

@@ -0,0 +1,45 @@
+use atty::Stream;
+use std::{io::{self, Read}, process::exit};
+
+const EXIT_SUCCESS: i32 = 0;
+const EXIT_INVALID_INPUT: i32 = 1;
+
+fn main() {
+    let input: String = if atty::is(Stream::Stdin) {
+        eprintln!("Error: Input JSON/YAML via STDIN is required.");
+        exit(EXIT_INVALID_INPUT);
+    } else {
+        let mut buffer: Vec<u8> = Vec::new();
+        io::stdin().read_to_end(&mut buffer).unwrap();
+        match String::from_utf8(buffer) {
+            Ok(input) => input,
+            Err(e) => {
+                eprintln!("Invalid UTF-8 sequence: {}", e);
+                exit(EXIT_INVALID_INPUT);
+            }
+        }
+    };
+
+    let mut is_json = true;
+    let input: serde_json::Value = match serde_json::from_str(&input) {
+        Ok(json) => json,
+        Err(_) => {
+            is_json = false;
+            match serde_yaml::from_str(&input) {
+                Ok(yaml) => yaml,
+                Err(err) => {
+                    eprintln!("Error: Input is not valid JSON or YAML: {}", err);
+                    exit(EXIT_INVALID_INPUT);
+                }
+            }
+        }
+    };
+
+    let output = match is_json {
+        true => serde_yaml::to_string(&input).unwrap(),
+        false => serde_json::to_string_pretty(&input).unwrap(),
+    };
+
+    println!("{}", output);
+    exit(EXIT_SUCCESS);
+}