Add rustfmt.toml configuration to adjust the format of imports

Makefile

@@ -130,8 +130,11 @@ docs:
 	@echo "" 								# Add a blank line
 	@cd docs && mdbook build 				# Build mdBook
 
+format:
+	./tools/format_all.sh
+
 check:
-	@cargo fmt --check              # Check Rust format issues
+	./tools/format_all.sh --check   # Check Rust format issues
 	@cargo kclippy -- -D warnings   # Make build fail if any warnings are found by rustc and clippy
 
 clean:

rustfmt.toml

@@ -0,0 +1,3 @@
+imports_granularity="Crate"
+group_imports="StdExternalCrate"
+reorder_imports=true

tools/format_all.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: MPL-2.0
+
+WORKSPACE_ROOT="$(dirname "$(readlink -f "$0")")/.."
+
+EXCLUDED_CRATES=$(sed -n '/^\[workspace\]/,/^\[.*\]/{/exclude = \[/,/\]/p}' "$WORKSPACE_ROOT/Cargo.toml" | grep -v "exclude = \[" | tr -d '", \]')
+
+
+CHECK_MODE=false
+
+if [ "$#" -eq 1 ]; then
+    if [ "$1" == "--check" ]; then
+        CHECK_MODE=true
+    else
+        echo "Error: Invalid argument. Only '--check' is allowed."
+        exit 1
+    fi
+elif [ "$#" -gt 1 ]; then
+    echo "Error: Too many arguments. Only '--check' is allowed."
+    exit 1
+fi
+
+cd $WORKSPACE_ROOT
+if [ "$CHECK_MODE" = true ]; then
+    cargo fmt --check
+else
+    cargo fmt
+fi
+
+for CRATE in $EXCLUDED_CRATES; do
+    CRATE_DIR="$WORKSPACE_ROOT/$CRATE"
+
+    # `cargo-component` crate currently is pinned to use Rust nightly-2023-02-05 version, 
+    # and when using this script in the current Docker environment, it will 
+    # additionally download this version of Rust. 
+    # Here temporarily skip processing this crate for now considering that this crate 
+    # is not currently in use or under development. 
+    case "$CRATE" in
+        *cargo-component*)
+            continue 
+            ;;
+    esac
+
+    if [ -d "$CRATE_DIR" ]; then
+        if [ "$CHECK_MODE" = true ]; then
+            (cd "$CRATE_DIR" && cargo fmt --check)
+        else
+            (cd "$CRATE_DIR" && cargo fmt)
+        fi
+    else
+        echo "Directory for crate $CRATE does not exist"
+    fi
+done
+