1 files changed, 57 insertions, 0 deletions

diff --git a/crates/ra_project_model/src/workspace_error.rs b/crates/ra_project_model/src/workspace_error.rs
new file mode 100644
index 000000000..5f7384968
--- /dev/null
+++ b/crates/ra_project_model/src/workspace_error.rs
@@ -0,0 +1,57 @@
+//! Workspace-related errors
+
+use std::{error::Error, fmt, io, path::PathBuf, string::FromUtf8Error};
+
+use ra_db::ParseEditionError;
+
+#[derive(Debug)]
+pub enum WorkspaceError {
+    CargoMetadataFailed(cargo_metadata::Error),
+    CargoTomlNotFound(PathBuf),
+    NoStdLib(PathBuf),
+    OpenWorkspaceError(io::Error),
+    ParseEditionError(ParseEditionError),
+    ReadWorkspaceError(serde_json::Error),
+    RustcCfgError,
+    RustcError(io::Error),
+    RustcOutputError(FromUtf8Error),
+    SysrootNotFound,
+}
+
+impl fmt::Display for WorkspaceError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::OpenWorkspaceError(err) | Self::RustcError(err) => write!(f, "{}", err),
+            Self::ParseEditionError(err) => write!(f, "{}", err),
+            Self::ReadWorkspaceError(err) => write!(f, "{}", err),
+            Self::RustcOutputError(err) => write!(f, "{}", err),
+            Self::CargoMetadataFailed(err) => write!(f, "cargo metadata failed: {}", err),
+            Self::RustcCfgError => write!(f, "failed to get rustc cfgs"),
+            Self::SysrootNotFound => write!(f, "failed to locate sysroot"),
+            Self::CargoTomlNotFound(path) => {
+                write!(f, "can't find Cargo.toml at {}", path.display())
+            }
+            Self::NoStdLib(sysroot) => write!(
+                f,
+                "can't load standard library from sysroot\n\
+                 {:?}\n\
+                 try running `rustup component add rust-src` or set `RUST_SRC_PATH`",
+                sysroot,
+            ),
+        }
+    }
+}
+
+impl From<ParseEditionError> for WorkspaceError {
+    fn from(err: ParseEditionError) -> Self {
+        Self::ParseEditionError(err.into())
+    }
+}
+
+impl From<cargo_metadata::Error> for WorkspaceError {
+    fn from(err: cargo_metadata::Error) -> Self {
+        Self::CargoMetadataFailed(err.into())
+    }
+}
+
+impl Error for WorkspaceError {}