feat: add a basic CLI for v0 CID

Cargo.toml

@@ -6,7 +6,7 @@ Generate IPFS CIDs (Content Identifiers) from a slice of bytes.
 keywords = ["ipfs", "cid", "content", "identifier", "hash"]
 authors = ["Abid Omar <[email protected]>"]
 exclude = ["tests/*", "examples/*", "data/*"]
-version = "1.0.0"
+version = "2.0.0"
 edition = "2021"
 license = "MIT"
 homepage = "https://github.com/omarabid/ipfs-cid"

README.md

@@ -30,6 +30,14 @@ QmUBnCzebDwZgkXp9ZkHHKQNfaeWn2Dw8p8vNz4GN4jBLa
 
 The file is accessible from IPFS at the same hash: [QmUBnCzebDwZgkXp9ZkHHKQNfaeWn2Dw8p8vNz4GN4jBLa](https://ipfs.io/ipfs/QmUBnCzebDwZgkXp9ZkHHKQNfaeWn2Dw8p8vNz4GN4jBLa)
 
+## CLI
+
+A basic CLI is avaiable in 2.0.0. It returns v0 CID of the passed file.
+
+**Usage**
+
+$ ipfs-cid _file_
+
 ### License
 
 This project is licensed under

src/main.rs

@@ -0,0 +1,16 @@
+// ipfs-cid is a tool to generate the CID of a file.
+// The CLI is simple and only takes a file path as an argument and prints the CID to STDOUT.
+pub fn main() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() != 2 {
+        eprintln!("Usage: ipfs-cid <file>");
+        std::process::exit(1);
+    }
+    let path = &args[1];
+    let file = std::fs::read(path).expect("Failed to read file");
+    let cid = ipfs_cid::generate_cid_v0(&file);
+    match cid {
+        Ok(cid) => println!("{}", cid),
+        Err(e) => eprintln!("Failed to generate CID: {}", e),
+    }
+}