Make toml optional

cargo-espflash/src/error.rs

@@ -60,24 +60,28 @@ pub enum Error {
 }
 
 /// TOML deserialization error
+#[cfg(feature = "cli")]
 #[derive(Debug)]
 pub struct TomlError {
     err: toml::de::Error,
     source: String,
 }
 
+#[cfg(feature = "cli")]
 impl TomlError {
     pub fn new(err: toml::de::Error, source: String) -> Self {
         Self { err, source }
     }
 }
 
+#[cfg(feature = "cli")]
 impl Display for TomlError {
     fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
         write!(f, "Failed to parse toml")
     }
 }
 
+#[cfg(feature = "cli")]
 impl Diagnostic for TomlError {
     fn source_code(&self) -> Option<&dyn SourceCode> {
         Some(&self.source)
@@ -92,6 +96,7 @@ impl Diagnostic for TomlError {
 }
 
 // NOTE: no `source` on purpose to prevent duplicating the message
+#[cfg(feature = "cli")]
 impl std::error::Error for TomlError {}
 
 /// Unsupported target error

espflash/Cargo.toml

@@ -53,7 +53,7 @@ sha2 = "0.10.8"
 slip-codec = { version = "0.4.0", optional = true }
 strum = { version = "0.26.1", features = ["derive"], optional = true }
 thiserror = "1.0.56"
-toml = "0.8.10"
+toml = { version = "0.8.10", optional = true }
 update-informer = { version = "1.1.0", optional = true }
 xmas-elf        = { version = "0.9.1", optional = true }
 
@@ -78,6 +78,7 @@ cli = [
     "dep:indicatif",
     "dep:lazy_static",
     "dep:parse_int",
+    "dep:toml",
     "dep:update-informer",
     "serialport"
 ]
@@ -86,4 +87,4 @@ cli = [
 serialport = ["flashing", "dep:serialport", "dep:slip-codec", "dep:regex", "dep:strum"]
 
 # enables flash stubs and stub commands
-flashing = ["xmas-elf"]
+flashing = ["xmas-elf", "dep:toml"]