Make backtrace and color-eyre optional

core/Cargo.toml

@@ -18,13 +18,13 @@ rust-version = "1.60"
 
 [dependencies]
 abscissa_derive = { version = "0.7", path = "../derive" }
-backtrace = "0.3"
 canonical-path = "2"
 fs-err = "2"
 once_cell = "1.17"
 
 # optional dependencies
 arc-swap = { version = "1", optional = true }
+backtrace = { version = "0.3", optional = true }
 color-eyre = { version = "0.6", optional = true, default-features = false }
 clap = { version = "4", optional = true, features = ["derive"] }
 regex = { version = "1", optional = true }
@@ -46,6 +46,7 @@ features = ["fmt", "env-filter", "ansi", "smallvec", "tracing-log"]
 [features]
 default = [
     "application",
+    "backtrace",
     "secrets",
     "testing",
 ]
@@ -57,6 +58,7 @@ application = [
     "semver/serde",
     "terminal"
 ]
+backtrace = ["dep:color-eyre", "dep:backtrace"]
 config = [
     "secrets",
     "serde",
@@ -65,7 +67,7 @@ config = [
 ]
 options = ["clap"]
 secrets = ["secrecy"]
-terminal = ["color-eyre", "termcolor"]
+terminal = ["termcolor"]
 testing = ["regex", "wait-timeout"]
 trace = [
     "tracing",

core/src/error/context.rs

@@ -1,6 +1,7 @@
 //! Error contexts
 
 use super::BoxError;
+#[cfg(feature = "backtrace")]
 use backtrace::Backtrace;
 use std::fmt::{self, Debug, Display};
 
@@ -14,6 +15,7 @@ where
     kind: Kind,
 
     /// Backtrace where error occurred
+    #[cfg(feature = "backtrace")]
     backtrace: Option<Backtrace>,
 
     /// Source of the error
@@ -26,9 +28,11 @@ where
 {
     /// Create a new error context
     pub fn new(kind: Kind, source: Option<BoxError>) -> Self {
+        #[cfg(feature = "backtrace")]
         let backtrace = Some(Backtrace::new_unresolved());
         Context {
             kind,
+            #[cfg(feature = "backtrace")]
             backtrace,
             source,
         }
@@ -40,11 +44,13 @@ where
     }
 
     /// Get the backtrace associated with this error (if available)
+    #[cfg(feature = "backtrace")]
     pub fn backtrace(&self) -> Option<&Backtrace> {
         self.backtrace.as_ref()
     }
 
     /// Extract the backtrace from the context, allowing it to be resolved.
+    #[cfg(feature = "backtrace")]
     pub fn into_backtrace(self) -> Option<Backtrace> {
         self.backtrace
     }

core/src/terminal/component.rs

@@ -14,6 +14,7 @@ impl Terminal {
         // TODO(tarcieri): handle terminal reinit (without panicking)
         super::init(color_choice);
 
+        #[cfg(feature = "backtrace")]
         if color_choice != ColorChoice::Never {
             // TODO(tarcieri): avoid panicking here
             color_eyre::install().expect("couldn't install color-eyre");