Added command line flags for help and version

Signed-off-by: zethra <benaagoldberg@gmail.com>

Cargo.lock

@@ -15,6 +15,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "arrayvec"
 version = "0.4.12"
@@ -144,6 +153,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "soup",
+ "structopt",
  "syslog",
  "u2f",
  "uuid 0.8.1",
@@ -259,6 +269,21 @@ dependencies = [
  "time 0.1.42",
 ]
 
+[[package]]
+name = "clap"
+version = "2.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -868,6 +893,15 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "heck"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.6"
@@ -1797,6 +1831,32 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
+[[package]]
+name = "proc-macro-error"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7959c6467d962050d639361f7703b2051c43036d03493c36f01d440fdd3138a"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2 1.0.8",
+ "quote 1.0.2",
+ "syn 1.0.14",
+ "version_check 0.9.1",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4002d9f55991d5e019fb940a90e1a95eb80c24e77cb2462dd4dc869604d543a"
+dependencies = [
+ "proc-macro2 1.0.8",
+ "quote 1.0.2",
+ "syn 1.0.14",
+ "syn-mid",
+ "version_check 0.9.1",
+]
+
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.11"
@@ -2554,6 +2614,36 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b1884d1bc09741d466d9b14e6d37ac89d6909cbcac41dd9ae982d4d063bbedfc"
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
+[[package]]
+name = "structopt"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fe43617218c0805c6eb37160119dc3c548110a67786da7218d1c6555212f073"
+dependencies = [
+ "clap",
+ "lazy_static",
+ "structopt-derive",
+]
+
+[[package]]
+name = "structopt-derive"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6e79c80e0f4efd86ca960218d4e056249be189ff1c42824dcd9a7f51a56f0bd"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2 1.0.8",
+ "quote 1.0.2",
+ "syn 1.0.14",
+]
+
 [[package]]
 name = "subtle"
 version = "1.0.0"
@@ -2599,6 +2689,17 @@ dependencies = [
  "unicode-xid 0.2.0",
 ]
 
+[[package]]
+name = "syn-mid"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
+dependencies = [
+ "proc-macro2 1.0.8",
+ "quote 1.0.2",
+ "syn 1.0.14",
+]
+
 [[package]]
 name = "synstructure"
 version = "0.12.3"
@@ -2648,6 +2749,15 @@ dependencies = [
  "utf-8",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.0.1"
@@ -2952,6 +3062,18 @@ dependencies = [
  "smallvec 1.2.0",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
@@ -3022,6 +3144,12 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fc439f2794e98976c88a2a2dafce96b930fe8010b0a256b3c2199a773933168"
 
+[[package]]
+name = "vec_map"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
+
 [[package]]
 name = "version_check"
 version = "0.1.5"

Cargo.toml

@@ -53,7 +53,7 @@ fern = { version = "0.5.9", features = ["syslog-4"] }
 diesel = { version = "1.4.3", features = [ "chrono", "r2d2"] }
 diesel_migrations = "1.4.0"
 
-# Bundled SQLite                                           
+# Bundled SQLite
 libsqlite3-sys = { version = "0.16.0", features = ["bundled"], optional = true }
 
 # Crypto library
@@ -114,6 +114,9 @@ percent-encoding = "2.1.0"
 # Punycode conversion
 idna = "0.2.0"
 
+# CLI argument parsing
+structopt = "0.3.11"
+
 [patch.crates-io]
 # Use newest ring
 rocket = { git = 'https://github.com/SergioBenitez/Rocket', rev = 'b95b6765e1cc8be7c1e7eaef8a9d9ad940b0ac13' }

src/main.rs

@@ -42,7 +42,18 @@ mod util;
 pub use config::CONFIG;
 pub use error::{Error, MapResult};
 
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+#[structopt(name = "bitwarden_rs", about = "A Bitwarden API server written in Rust")]
+struct Opt {
+    /// Prints the app version
+    #[structopt(short, long)]
+    version: bool,
+}
+
 fn main() {
+    parse_args();
     launch_info();
 
     use log::LevelFilter as LF;
@@ -64,6 +75,18 @@ fn main() {
     launch_rocket(extra_debug);
 }
 
+fn parse_args() {
+    let opt = Opt::from_args();
+    if opt.version {
+        if let Some(version) = option_env!("GIT_VERSION") {
+            println!("bitwarden_rs {}", version);
+        } else {
+            println!("bitwarden_rs (Version info from Git not present)");
+        }
+        exit(0);
+    }
+}
+
 fn launch_info() {
     println!("/--------------------------------------------------------------------\\");
     println!("|                       Starting Bitwarden_RS                        |");
@@ -177,7 +200,9 @@ fn check_rsa_keys() {
         info!("JWT keys don't exist, checking if OpenSSL is available...");
 
         Command::new("openssl").arg("version").status().unwrap_or_else(|_| {
-            info!("Can't create keys because OpenSSL is not available, make sure it's installed and available on the PATH");
+            info!(
+                "Can't create keys because OpenSSL is not available, make sure it's installed and available on the PATH"
+            );
             exit(1);
         });