qt-build-utils: split error into separate module

Author: ahayzen-kdab

crates/qt-build-utils/src/error.rs

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: 2025 Klarälvdalens Datakonsult AB, a KDAB Group company <[email protected]>
+// SPDX-FileContributor: Andrew Hayzen <[email protected]>
+//
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+/// Errors that can occur while using [QtBuild]
+pub enum QtBuildError {
+    /// `QMAKE` environment variable was set but Qt was not detected
+    #[error("QMAKE environment variable specified as {qmake_env_var} but could not detect Qt: {error:?}")]
+    QMakeSetQtMissing {
+        /// The value of the qmake environment variable when the error occurred
+        qmake_env_var: String,
+        /// The inner error that occurred
+        error: Box<anyhow::Error>,
+    },
+    /// Qt was not found
+    #[error("Could not find Qt")]
+    QtMissing,
+    /// Executing `qmake -query` failed
+    #[error("Executing `qmake -query` failed: {0:?}")]
+    QmakeFailed(#[from] std::io::Error),
+    /// `QT_VERSION_MAJOR` environment variable was specified but could not be parsed as an integer
+    #[error("QT_VERSION_MAJOR environment variable specified as {qt_version_major_env_var} but could not parse as integer: {source:?}")]
+    QtVersionMajorInvalid {
+        /// The Qt major version from `QT_VERSION_MAJOR`
+        qt_version_major_env_var: String,
+        /// The [std::num::ParseIntError] when parsing the `QT_VERSION_MAJOR`
+        source: std::num::ParseIntError,
+    },
+    /// `QT_VERSION_MAJOR` environment variable was specified but the Qt version specified by `qmake -query QT_VERSION` did not match
+    #[error("qmake version ({qmake_version}) does not match version specified by QT_VERSION_MAJOR ({qt_version_major})")]
+    QtVersionMajorDoesNotMatch {
+        /// The qmake version
+        qmake_version: u64,
+        /// The Qt major version from `QT_VERSION_MAJOR`
+        qt_version_major: u64,
+    },
+}

crates/qt-build-utils/src/lib.rs

@@ -15,6 +15,9 @@
 
 #![allow(clippy::too_many_arguments)]
 
+mod error;
+pub use error::QtBuildError;
+
 mod installation;
 pub use installation::QtInstallation;
 
@@ -38,42 +41,6 @@ use std::{
 };
 
 use semver::Version;
-use thiserror::Error;
-
-#[derive(Error, Debug)]
-/// Errors that can occur while using [QtBuild]
-pub enum QtBuildError {
-    /// `QMAKE` environment variable was set but Qt was not detected
-    #[error("QMAKE environment variable specified as {qmake_env_var} but could not detect Qt: {error:?}")]
-    QMakeSetQtMissing {
-        /// The value of the qmake environment variable when the error occurred
-        qmake_env_var: String,
-        /// The inner error that occurred
-        error: Box<anyhow::Error>,
-    },
-    /// Qt was not found
-    #[error("Could not find Qt")]
-    QtMissing,
-    /// Executing `qmake -query` failed
-    #[error("Executing `qmake -query` failed: {0:?}")]
-    QmakeFailed(#[from] std::io::Error),
-    /// `QT_VERSION_MAJOR` environment variable was specified but could not be parsed as an integer
-    #[error("QT_VERSION_MAJOR environment variable specified as {qt_version_major_env_var} but could not parse as integer: {source:?}")]
-    QtVersionMajorInvalid {
-        /// The Qt major version from `QT_VERSION_MAJOR`
-        qt_version_major_env_var: String,
-        /// The [std::num::ParseIntError] when parsing the `QT_VERSION_MAJOR`
-        source: std::num::ParseIntError,
-    },
-    /// `QT_VERSION_MAJOR` environment variable was specified but the Qt version specified by `qmake -query QT_VERSION` did not match
-    #[error("qmake version ({qmake_version}) does not match version specified by QT_VERSION_MAJOR ({qt_version_major})")]
-    QtVersionMajorDoesNotMatch {
-        /// The qmake version
-        qmake_version: u64,
-        /// The Qt major version from `QT_VERSION_MAJOR`
-        qt_version_major: u64,
-    },
-}
 
 fn command_help_output(command: &str) -> std::io::Result<std::process::Output> {
     Command::new(command).args(["--help"]).output()