drop thiserror dep

2 files changed, 22 insertions, 8 deletions

diff --git a/Cargo.toml b/Cargo.toml
index c8c7700..1dd1f26 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,6 @@ license = "MIT"
 itoa = "0.4.8"
 nix = "0.23.0"
 terminal_size = "0.1.17"
-thiserror = "1.0.30"
 vt100 = "0.14.0"
 
 blocking = { version = "1.1.0", optional = true }
diff --git a/src/error.rs b/src/error.rs
index 90c6786..f87cead 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,18 +1,33 @@
 /// Type for errors returned by this crate.
-#[derive(thiserror::Error, Debug)]
+#[derive(Debug)]
 pub enum Error {
     /// error reading from stdin
-    #[error("error reading from stdin")]
-    ReadStdin(#[source] std::io::Error),
+    ReadStdin(std::io::Error),
 
     /// error setting terminal mode
-    #[error("error setting terminal mode")]
-    SetTerminalMode(#[source] nix::Error),
+    SetTerminalMode(nix::Error),
 
     /// error writing to stdout
-    #[error("error writing to stdout")]
-    WriteStdout(#[source] std::io::Error),
+    WriteStdout(std::io::Error),
 }
 
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::ReadStdin(e) => {
+                write!(f, "error reading from stdin: {}", e)
+            }
+            Self::SetTerminalMode(e) => {
+                write!(f, "error setting terminal mode: {}", e)
+            }
+            Self::WriteStdout(e) => {
+                write!(f, "error writing to stdout: {}", e)
+            }
+        }
+    }
+}
+
+impl std::error::Error for Error {}
+
 /// Convenience wrapper for a `Result` using `textmode::Error`.
 pub type Result<T> = std::result::Result<T, Error>;