Fix redacting Vec<T> options

This changes argh_derive to handle redacting types like:

```
struct Cmd {
    #[argh(option)]
    /// fooey
    arg: Vec<String>,
}
```

Fixes #111

Author: erickt

argh/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "argh"
-version = "0.1.6"
+version = "0.1.7"
 authors = ["Taylor Cramer <[email protected]>", "Benjamin Brittain <[email protected]>", "Erick Tryzelaar <[email protected]>"]
 edition = "2018"
 keywords = ["args", "arguments", "derive", "cli"]
@@ -10,5 +10,5 @@ repository = "https://github.com/google/argh"
 readme = "README.md"
 
 [dependencies]
-argh_shared = { version = "0.1.6", path = "../argh_shared" }
-argh_derive = { version = "0.1.6", path = "../argh_derive" }
+argh_shared = { version = "0.1.7", path = "../argh_shared" }
+argh_derive = { version = "0.1.7", path = "../argh_derive" }

argh/tests/lib.rs

@@ -1004,6 +1004,24 @@ fn redact_arg_values_option_one_optional_args() {
     assert_eq!(actual, &["program-name", "--msg"]);
 }
 
+#[test]
+fn redact_arg_values_option_repeating() {
+    #[derive(FromArgs, Debug)]
+    /// Short description
+    struct Cmd {
+        #[argh(option)]
+        /// fooey
+        _msg: Vec<String>,
+    }
+
+    let actual = Cmd::redact_arg_values(&["program-name"], &[]).unwrap();
+    assert_eq!(actual, &["program-name"]);
+
+    let actual =
+        Cmd::redact_arg_values(&["program-name"], &["--msg", "abc", "--msg", "xyz"]).unwrap();
+    assert_eq!(actual, &["program-name", "--msg", "--msg"]);
+}
+
 #[test]
 fn redact_arg_values_switch() {
     #[derive(FromArgs, Debug)]

argh_derive/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "argh_derive"
-version = "0.1.6"
+version = "0.1.7"
 authors = ["Taylor Cramer <[email protected]>", "Benjamin Brittain <[email protected]>", "Erick Tryzelaar <[email protected]>"]
 edition = "2018"
 license = "BSD-3-Clause"
@@ -16,4 +16,4 @@ heck = "0.3.1"
 proc-macro2 = "1.0"
 quote = "1.0"
 syn = "1.0"
-argh_shared = { version = "0.1.5", path = "../argh_shared" }
+argh_shared = { version = "0.1.7", path = "../argh_shared" }

argh_derive/src/lib.rs

@@ -626,8 +626,17 @@ fn declare_local_storage_for_redacted_fields<'a>(
                 }
             }
             FieldKind::Option => {
+                let field_slot_type = match field.optionality {
+                    Optionality::Repeating => {
+                        quote! { std::vec::Vec<String> }
+                    }
+                    Optionality::None | Optionality::Optional | Optionality::Defaulted(_) => {
+                        quote! { std::option::Option<String> }
+                    }
+                };
+
                 quote! {
-                    let mut #field_name: argh::ParseValueSlotTy::<Option<String>, String> =
+                    let mut #field_name: argh::ParseValueSlotTy::<#field_slot_type, String> =
                         argh::ParseValueSlotTy {
                         slot: std::default::Default::default(),
                         parse_func: |arg, _| { Ok(arg.to_string()) },
@@ -668,13 +677,27 @@ fn unwrap_redacted_fields<'a>(
         let field_name = field.name;
 
         match field.kind {
-            FieldKind::Switch | FieldKind::Option => {
+            FieldKind::Switch => {
                 quote! {
                     if let Some(__field_name) = #field_name.slot {
                         __redacted.push(__field_name);
                     }
                 }
             }
+            FieldKind::Option => match field.optionality {
+                Optionality::Repeating => {
+                    quote! {
+                        __redacted.extend(#field_name.slot.into_iter());
+                    }
+                }
+                Optionality::None | Optionality::Optional | Optionality::Defaulted(_) => {
+                    quote! {
+                        if let Some(__field_name) = #field_name.slot {
+                            __redacted.push(__field_name);
+                        }
+                    }
+                }
+            },
             FieldKind::Positional => {
                 quote! {
                     __redacted.extend(#field_name.slot.into_iter());

argh_shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "argh_shared"
-version = "0.1.6"
+version = "0.1.7"
 authors = ["Taylor Cramer <[email protected]>", "Benjamin Brittain <[email protected]>", "Erick Tryzelaar <[email protected]>"]
 edition = "2018"
 license = "BSD-3-Clause"