port to dart

.github/workflows/run-tests.yml

@@ -13,11 +13,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Golang
-        uses: actions/setup-go@v2
+      - uses: actions/checkout@v3
+      - name: Set up Dart
+        uses: dart-lang/setup-dart@v1
         with:
-          go-version: 1.16.x
-      - name: Run Golang tests
-        run: go test
+          sdk: 3.1
+      - name: Run Dart tests
+        run: dart pdu_test.dart
 

.gitignore

@@ -1,3 +1,5 @@
 smscsim
 *.swp
-
+.idea/
+main.exe
+main

Dockerfile

@@ -1,21 +1,25 @@
-FROM golang:1.13.15-alpine AS build
+FROM dart:3.1.3-sdk AS build
 
 WORKDIR /app
 
 COPY . /app
 
-RUN apk upgrade --update \
-    && apk add -U tzdata \
-    && rm -rf /var/cache/apk/* \
-    && go build
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata \
+    && dart compile exe main.dart -o smscsim
 
 ##########################################
 
-FROM alpine:3.12.1
+FROM scratch
 
+# copy necessary libs
+COPY --from=build /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/libdl.so.2
+COPY --from=build /lib/x86_64-linux-gnu/libpthread.so.0 /lib/x86_64-linux-gnu/libpthread.so.0
+COPY --from=build /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/libm.so.6
+COPY --from=build /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libc.so.6
+COPY --from=build /lib64/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2
 COPY --from=build /usr/share/zoneinfo /usr/share/zoneinfo
 
+# copy app itself
 COPY --from=build /app/smscsim /app/smscsim
 
 ENTRYPOINT ["/app/smscsim"]
-

README.md

@@ -6,21 +6,20 @@ Lightweight, zero-dependency and stupid SMSc simulator.
 
 ### Usage
 
-1) Build from sources (need golang compiler)
+1) Run as dart script
 
 ```
-go build
-./smscsim
+dart main.dart
 ```
 
-2) or build docker image
+2) or compile to single executable and run it
 
 ```
-docker build -t smscsim .
-docker run -p 2775:2775 -p 12775:12775 smscsim
+dart compile exe main.dart -o smscsim
+./smscsim
 ```
 
-3) or build and run with docker-compose
+3) or build and start with docker-compose
 
 ```
 docker-compose up

main.dart

@@ -0,0 +1,26 @@
+import 'dart:io';
+
+import 'smsc.dart';
+import 'web.dart';
+
+final int DEF_SMSC_PORT = 2775;
+final int DEF_WEB_PORT = 12775;
+
+void main() {
+  var env = Platform.environment;
+  var smscPort = parseInt(env['SMSC_PORT'], DEF_SMSC_PORT);
+  var webPort = parseInt(env['WEB_PORT'], DEF_WEB_PORT);
+  var failedSubmits = parseBool(env['FAILED_SUBMITS'], false);
+
+  var smsc = SmscServer(failedSubmits);
+  smsc.start(smscPort);
+  WebServer(smsc).start(webPort);
+}
+
+int parseInt(String? n, int def) {
+  return int.tryParse(n ?? "$def") ?? def;
+}
+
+bool parseBool(String? b, bool def) {
+  return bool.tryParse(b ?? "$def") ?? def;
+}