Add debug logging

.github/workflows/build-cli.yml

@@ -6,6 +6,9 @@ on:
       - main
   pull_request:
 
+env:
+  WEB5_SDK_LOG_LEVEL: debug
+
 jobs:
   build_aarch64_apple_darwin:
     runs-on: macos-latest

.github/workflows/ci.yml

@@ -10,6 +10,7 @@ env:
   CARGO_TERM_COLOR: always
   # Make sure CI fails on all warnings, including Clippy lints
   RUSTFLAGS: "-Dwarnings"
+  WEB5_SDK_LOG_LEVEL: debug
 
 jobs:
   build:

crates/web5/Cargo.toml

@@ -15,6 +15,7 @@ josekit = "0.8.6"
 jsonpath-rust = "0.5.1"
 jsonschema = { version = "0.18.0", default-features = false }
 k256 = { version = "0.13.3", features = ["ecdsa", "jwk"] }
+lazy_static = "1.5.0"
 tokio = "1.38.0"
 rand = { workspace = true }
 regex = "1.10.4"

crates/web5/src/lib.rs

@@ -4,3 +4,30 @@ pub mod dids;
 
 #[cfg(test)]
 mod test_helpers;
+
+lazy_static::lazy_static! {
+  pub(crate) static ref LOG_LEVEL: Option<String> = {
+      std::env::var("WEB5_SDK_LOG_LEVEL").ok()
+  };
+}
+
+pub(crate) mod logging {
+  #[macro_export]
+  macro_rules! log_dbg {
+      ($msg:expr, $($arg:tt)*) => {
+          if let Some(ref level) = *$crate::LOG_LEVEL {
+              if level == "DEBUG" {
+                  println!("[DEBUG] {}", format!($msg, $($arg)*));
+              }
+          }
+      };
+      ($closure:expr) => {
+          if let Some(ref level) = *$crate::LOG_LEVEL {
+              if level == "DEBUG" {
+                  let msg = $closure();
+                  println!("[DEBUG] {}", msg);
+              }
+          }
+      };
+  }
+}