Add build script

build.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+echo $(bash --version 2>&1 | head -n 1)
+
+set -eo pipefail
+SCRIPT_DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
+
+###########################################################################
+# CONFIGURATION
+###########################################################################
+
+BUILD_PROJECT_FILE="$SCRIPT_DIR/build/_build.csproj"
+TEMP_DIRECTORY="$SCRIPT_DIR//.tmp"
+
+DOTNET_GLOBAL_FILE="$SCRIPT_DIR//global.json"
+DOTNET_INSTALL_URL="https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.sh"
+DOTNET_CHANNEL="Current"
+
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
+
+###########################################################################
+# EXECUTION
+###########################################################################
+
+function FirstJsonValue {
+    perl -nle 'print $1 if m{"'$1'": "([^"\-]+)",?}' <<< ${@:2}
+}
+
+# If global.json exists, load expected version
+if [ -f "$DOTNET_GLOBAL_FILE" ]; then
+    DOTNET_VERSION=$(FirstJsonValue "version" $(cat "$DOTNET_GLOBAL_FILE"))
+    if [ "$DOTNET_VERSION" == ""  ]; then
+        unset DOTNET_VERSION
+    fi
+fi
+
+# If dotnet is installed locally, and expected version is not set or installation matches the expected version
+if [[ -x "$(command -v dotnet)" && (-z ${DOTNET_VERSION+x} || $(dotnet --version) == "$DOTNET_VERSION") ]]; then
+    export DOTNET_EXE="$(command -v dotnet)"
+else
+    DOTNET_DIRECTORY="$TEMP_DIRECTORY/dotnet-unix"
+    export DOTNET_EXE="$DOTNET_DIRECTORY/dotnet"
+    
+    # Download install script
+    DOTNET_INSTALL_FILE="$TEMP_DIRECTORY/dotnet-install.sh"
+    mkdir -p "$TEMP_DIRECTORY"
+    curl -Lsfo "$DOTNET_INSTALL_FILE" "$DOTNET_INSTALL_URL"
+    chmod +x "$DOTNET_INSTALL_FILE"
+    
+    # Install by channel or version
+    if [ -z ${DOTNET_VERSION+x} ]; then
+        "$DOTNET_INSTALL_FILE" --install-dir "$DOTNET_DIRECTORY" --channel "$DOTNET_CHANNEL" --no-path
+    else
+        "$DOTNET_INSTALL_FILE" --install-dir "$DOTNET_DIRECTORY" --version "$DOTNET_VERSION" --no-path
+    fi
+fi
+
+echo "Microsoft (R) .NET Core SDK version $("$DOTNET_EXE" --version)"
+
+"$DOTNET_EXE" build "$BUILD_PROJECT_FILE" /nodeReuse:false
+"$DOTNET_EXE" run --project "$BUILD_PROJECT_FILE" --no-build -- "$@"