Basic feature flag mechanism (#5350)

2 files changed, 13 insertions, 1 deletions

diff --git a/crates/typst-cli/src/args.rs b/crates/typst-cli/src/args.rs
index a4ac4bd9..9437f848 100644
--- a/crates/typst-cli/src/args.rs
+++ b/crates/typst-cli/src/args.rs
@@ -274,8 +274,17 @@ pub struct SharedArgs {
     /// defaults to number of CPUs. Setting it to 1 disables parallelism.
     #[clap(long, short)]
     pub jobs: Option<usize>,
+
+    /// Enables in-development features that may be changed or removed at any
+    /// time.
+    #[arg(long = "feature", value_delimiter = ',')]
+    pub feature: Vec<Feature>,
 }
 
+/// An in-development feature that may be changed or removed at any time.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, ValueEnum)]
+pub enum Feature {}
+
 /// Arguments related to where packages are stored in the system.
 #[derive(Debug, Clone, Args)]
 pub struct PackageStorageArgs {
diff --git a/crates/typst-cli/src/world.rs b/crates/typst-cli/src/world.rs
index f3597544..a04de2c0 100644
--- a/crates/typst-cli/src/world.rs
+++ b/crates/typst-cli/src/world.rs
@@ -112,7 +112,10 @@ impl SystemWorld {
                 .map(|(k, v)| (k.as_str().into(), v.as_str().into_value()))
                 .collect();
 
-            Library::builder().with_inputs(inputs).build()
+            let features =
+                command.feature.iter().map(|&feature| match feature {}).collect();
+
+            Library::builder().with_inputs(inputs).with_features(features).build()
         };
 
         let fonts = Fonts::searcher()