Add CI build job

.github/workflows/ci.yml

@@ -34,3 +34,15 @@ jobs:
             - name: Analyze
               shell: bash
               run: ./ci/analyze.sh --analyzer shellcheck
+
+    build:
+        name: Build
+        runs-on: ubuntu-20.04
+        steps:
+            - uses: actions/checkout@v4
+            - name: Install dependencies
+              shell: bash
+              run: sudo apt update && sudo apt install avr-libc avrdude gcc-avr
+            - name: Build
+              shell: bash
+              run: ./ci/build.sh

ci/build.sh

@@ -0,0 +1,121 @@
+#!/usr/bin/env bash
+
+# toolchain-avr-gcc
+#
+# Copyright 2019-2024, Andrew Countryman <apcountryman@gmail.com> and the
+# toolchain-avr-gcc contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+# file except in compliance with the License. You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under
+# the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the specific language governing
+# permissions and limitations under the License.
+
+# Description: CI build script.
+
+function error()
+{
+    local -r message="$1"
+
+    ( >&2 echo "$mnemonic: $message" )
+}
+
+function abort()
+{
+    if [[ "$#" -gt 0 ]]; then
+        local -r message="$1"
+
+        error "$message, aborting"
+    fi
+
+    exit 1
+}
+
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
+function display_help_text()
+{
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Ensure no build errors are present.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic\n" \
+        "OPTIONS\n" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic\n" \
+        ""
+}
+
+function display_version()
+{
+    echo "$mnemonic, version $version"
+}
+
+function ensure_no_build_errors_are_present()
+{
+    local -r toolchain_file="$repository/toolchain.cmake"
+    local -r build_directory="$repository/build"
+
+    if ! cmake -DCMAKE_TOOLCHAIN_FILE="$toolchain_file" -S "$repository" -B "$build_directory"; then
+        abort
+    fi
+
+    if ! cmake --build "$build_directory" -j "$( nproc )"; then
+        abort
+    fi
+}
+
+function main()
+{
+    local -r script=$( readlink -f "$0" )
+    local -r mnemonic=$( basename "$script" )
+
+    validate_script
+
+    local -r repository=$( readlink -f "$( dirname "$script" )/.." )
+    local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
+
+    while [[ "$#" -gt 0 ]]; do
+        local argument="$1"; shift
+
+        case "$argument" in
+            --help)
+                display_help_text
+                exit
+                ;;
+            --version)
+                display_version
+                exit
+                ;;
+            --*)
+                ;&
+            -*)
+                abort "'$argument' is not a supported option"
+                ;;
+            *)
+                abort "'$argument' is not a valid argument"
+                ;;
+        esac
+    done
+
+    ensure_no_build_errors_are_present
+}
+
+main "$@"