rust(deps): move macros into a separate file

src/lang/rust/deps.rs

@@ -1,59 +1,10 @@
 use cargo::core::{PackageId, Resolve};
 use semver::Version;
 
-use crate::inputs::AllInputs;
+use crate::{inputs::AllInputs, macros::input_macros};
 
 pub(super) fn load_rust_dependency(inputs: &mut AllInputs, resolve: &Resolve, pkg: PackageId) {
-    macro_rules! input {
-        ($key:ident: $($input:expr),+) => {
-            input!($key: $($input),+; always)
-        };
-        ($key:ident: $($input:expr),+; $sys:ident) => {{
-            $(
-                inputs.$key.$sys.insert($input.into());
-            )+
-        }};
-    }
-
-    macro_rules! environ {
-        ($name:expr, $value:expr) => {
-            environ!($name, $value;);
-        };
-        ($name:expr, $value:expr; $($tt:tt)*) => {
-            inputs.env.insert(
-                $name.into(),
-                ($value.into(), vec![$($tt)*]),
-            );
-        };
-    }
-
-    // native build inputs
-    macro_rules! native_build {
-        ($($tt:tt)+) => {
-            input!(native_build_inputs: $($tt)+)
-        };
-    }
-
-    // build inputs
-    macro_rules! build {
-        ($($tt:tt)+) => {
-            input!(build_inputs: $($tt)+)
-        };
-    }
-
-    // apple frameworks
-    macro_rules! framework {
-        ($($input:literal),+) => {
-            build!($(concat!("darwin.apple_sdk.frameworks.", $input)),+; darwin)
-        };
-    }
-
-    // gstreamer libraries
-    macro_rules! gst {
-        ($($input:literal),+) => {
-            build!($(concat!("gst_all_1.", $input)),+)
-        };
-    }
+    input_macros!(inputs);
 
     match &*pkg.name() {
         "alsa-sys" => build!("alsa-lib"; linux),

src/macros.rs

@@ -0,0 +1,63 @@
+/// define a set af macros to work with inputs
+macro_rules! input_macros {
+    // workaround to escape `$`
+    // so it can be used with nested macro_rules
+    ($inputs:ident) => {
+        input_macros!(($) $inputs);
+    };
+
+    (($_:tt) $inputs:ident) => {
+        macro_rules! input {
+            ($key:ident: $_($input:expr),+) => {
+                input!($key: $_($input),+; always)
+            };
+            ($key:ident: $_($input:expr),+; $sys:ident) => {{
+                $_(
+                    $inputs.$key.$sys.insert($input.into());
+                )+
+            }};
+        }
+
+        macro_rules! environ {
+            ($name:expr, $value:expr) => {
+                environ!($name, $value;);
+            };
+            ($name:expr, $value:expr; $_($tt:tt)*) => {
+                $inputs.env.insert(
+                    $name.into(),
+                    ($value.into(), vec![$_($tt)*]),
+                );
+            };
+        }
+
+        // native build inputs
+        macro_rules! native_build {
+            ($_($tt:tt)+) => {
+                input!(native_build_inputs: $_($tt)+)
+            };
+        }
+
+        // build inputs
+        macro_rules! build {
+            ($_($tt:tt)+) => {
+                input!(build_inputs: $_($tt)+)
+            };
+        }
+
+        // apple frameworks
+        macro_rules! framework {
+            ($_($input:literal),+) => {
+                build!($_(concat!("darwin.apple_sdk.frameworks.", $input)),+; darwin)
+            };
+        }
+
+        // gstreamer libraries
+        macro_rules! gst {
+            ($_($input:literal),+) => {
+                build!($_(concat!("gst_all_1.", $input)),+)
+            };
+        }
+    };
+}
+
+pub(crate) use input_macros;

src/main.rs

@@ -6,6 +6,7 @@ mod fetcher;
 mod inputs;
 mod lang;
 mod license;
+mod macros;
 mod prompt;
 mod utils;