Add version command line argument

* -V and --version now print the program version and exit
* Use the `exitcode` crate
* Rename `options` variable to `accepted_args`, which seems clearer
  given its usage.

1 files changed, 7 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 57aaf77..ddb95b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,6 +34,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "exitcode"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de853764b47027c2e862a995c34978ffa63c1501f2e15f987ba11bd4f9bba193"
+
+[[package]]
 name = "gag"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -102,6 +108,7 @@ name = "passextract"
 version = "0.5.0"
 dependencies = [
  "clipboard",
+ "exitcode",
  "rustty",
 ]