Get PDF file path from free command line argument

Add 'getopts' to parse command line arguments. Replace `--fill` argument
condition with 'getopts'. Replace the hard-coded PDF file path with one
from the command line argument.

3 files changed, 31 insertions, 2 deletions

diff --git a/Cargo.lock b/Cargo.lock
index c1779ef..ae4aeee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -332,12 +332,22 @@ name = "formurapid"
 version = "0.0.1"
 dependencies = [
  "derive_builder",
+ "getopts",
  "pdf_forms",
  "serde",
  "toml",
 ]
 
 [[package]]
+name = "getopts"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
 name = "gif"
 version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -855,6 +865,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
+[[package]]
 name = "unicode-xid"
 version = "0.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 3697c5d..af7c62b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ edition = "2018"
 
 [dependencies]
 derive_builder = "0.10.0"
+getopts = "0.2.21"
 pdf_forms = "0.3.4"
 serde = { version = "1.0.125", features = ["derive"]  }
 toml = "0.5.8"
diff --git a/src/main.rs b/src/main.rs
index 0577197..ff765e1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 use derive_builder::Builder;
+use getopts::Options;
 use pdf_forms::{Form, FieldType};
 use serde::{Deserialize, Serialize};
 
@@ -27,9 +28,20 @@ struct Field<'a> {
 fn main() {
     let args: Vec<String> = env::args().collect();
 
-    let mut form = Form::load("./f1040.pdf").unwrap();
+    let mut opts = Options::new();
+    opts.optflag("", "fill", "fill in the form using a markup file");
 
-    if args.len() == 2 && args[1] == "--fill" {
+    let opt_matches = opts.parse(&args[1..]).unwrap();
+
+    if opt_matches.free.is_empty() {
+        return;
+    }
+
+    let form_path = &opt_matches.free[0];
+
+    let mut form = Form::load(form_path).unwrap();
+
+    if opt_matches.opt_present("fill") {
         fill("./f1040.toml", &mut form);
 
         return;