1 files changed, 71 insertions, 0 deletions
diff --git a/crates/cli/src/cmd/dump.rs b/crates/cli/src/cmd/dump.rs
new file mode 100644
index 0000000..78fb28b
--- /dev/null
+++ b/crates/cli/src/cmd/dump.rs
@@ -0,0 +1,71 @@
+use anstream::println;
+use eyre::Result;
+use owo_colors::OwoColorize;
+use tinywasm::types::{ExternalKind, ImportKind};
+
+use crate::cli::ModuleInputArgs;
+use crate::load::load_module;
+
+pub fn run(args: ModuleInputArgs) -> Result<()> {
+    let loaded = load_module(&args.module)?;
+    let module = loaded.module;
+
+    let imported_func_count =
+        module.imports.iter().filter(|import| matches!(import.kind, ImportKind::Function(_))).count() as u32;
+
+    for (func_idx, func) in module.funcs.iter().enumerate() {
+        let global_idx = imported_func_count + func_idx as u32;
+
+        let exports = module
+            .exports
+            .iter()
+            .filter(|export| export.kind == ExternalKind::Func && export.index == global_idx)
+            .map(|export| export.name.as_ref())
+            .collect::<Vec<_>>();
+
+        let header = format!("func[{func_idx}]").blue().bold().to_string();
+        if exports.is_empty() {
+            println!("{header}");
+        } else {
+            println!("{header} {}", format!("exports={}", format!("{exports:?}").cyan()).bright_black());
+        }
+
+        for (ip, instr) in func.instructions.iter().enumerate() {
+            let instr = print_instr(instr);
+            println!("  {}: {}", print_ip(ip), instr);
+        }
+        println!();
+    }
+
+    Ok(())
+}
+
+fn print_ip(ip: usize) -> String {
+    let s = format!("{ip:04}");
+    let first_non_zero = s.find(|c| c != '0').unwrap_or(s.len() - 1);
+
+    format!(
+        "{}{}",
+        &s[..first_non_zero].to_string().bright_black().dimmed(),
+        &s[first_non_zero..].to_string().bright_black()
+    )
+}
+
+fn print_instr(instr: &tinywasm::types::Instruction) -> String {
+    let instr = format!("{instr:?}");
+    let Some(split) = instr.find(['(', ' ', '{']) else {
+        return instr.bold().to_string();
+    };
+
+    let (name, rest) = instr.split_at(split);
+
+    let rest = rest
+        .replace('(', &"(".bright_black().to_string())
+        .replace(')', &")".bright_black().to_string())
+        .replace('{', &"{".bright_black().to_string())
+        .replace('}', &"}".bright_black().to_string())
+        .replace(',', &",".bright_black().to_string())
+        .replace(':', &":".bright_black().to_string());
+
+    format!("{}{}", name.bold(), rest)
+}