Add rustfmt config

.pre-commit-config.yaml

@@ -39,20 +39,20 @@ repos:
     hooks:
       - id: shellcheck
   - repo: https://github.com/codespell-project/codespell
-    rev: v2.2.2
+    rev: v2.2.4
     hooks:
       - id: codespell
         args: [--ignore-words=.codespellignore]
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v3.0.0-alpha.4
+    rev: v3.0.0-alpha.6
     hooks:
       - id: prettier
         types_or:
           - markdown
           - yaml
   # https://reuse.software
   - repo: https://github.com/fsfe/reuse-tool
-    rev: v1.1.0
+    rev: v1.1.2
     hooks:
       - id: reuse
   - repo: https://github.com/doublify/pre-commit-rust

.rustfmt.toml

@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: slowtec GmbH
+# SPDX-License-Identifier: CC0-1.0
+
+# Only add deviations from the default settings!
+
+# Consistently use a single edition for all workspace crates, should match Cargo.toml
+edition = "2021"
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#imports_granularity>
+imports_granularity = "Crate"
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#group_imports>
+group_imports = "StdExternalCrate"
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#use_field_init_shorthand>
+use_field_init_shorthand = true
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#use_try_shorthand>
+use_try_shorthand = true
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#format_strings>
+format_strings = true
+
+# <https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#format_code_in_doc_comments>
+format_code_in_doc_comments = true