Specify config file path by env and fixing arm release (#557)

* Implementing env config file path option

* fixing compiling errors

* fixing test

* fixing test

* testing

* updating the docs

* [Gradle Release Plugin] - new version commit:  '3.26.0-snapshot'.

* release notes

* fixing arm build mirror and ajusting test

* new mirrors

* formatting

* refactoring

* clean code

Author: mageddo

RELEASE-NOTES.md

@@ -1,3 +1,6 @@
+## 3.26.0
+* Option to set config file path from the ENV, see the docs.
+
 ## 3.25.14
 * Fixing SolverRemote NPE #533
 

docs/content/3-configuration/_index.en.md

@@ -13,7 +13,7 @@ Default: `8.8.8.8`.
 ### Web Server Port
 Web GUI port, Default: `5380`.
 
-### DNS Server Port 
+### DNS Server Port
 Default: `53`.
 
 ### Log Level
@@ -40,7 +40,7 @@ If should register container name / service name as a hostname. Default: false.
 ### Domain
 The container names domain used on the registered container, services. Default: `docker`.
 
-Ex: 
+Ex:
 ```bash
 docker run --rm --name nginx nginx
 ```
@@ -61,8 +61,8 @@ Default: false.
 If DPS must be set as the default DNS automatically, commonly requires DPS be run as sudo/administrator permissions,
 this options also won't work in some cases when running inside a docker container, [see the feature details][1].
 
-### Host Machine Hostname 
-Hostname to solve machine IP, domain can be changed by Domain option. Default: `host.docker`. 
+### Host Machine Hostname
+Hostname to solve machine IP, domain can be changed by Domain option. Default: `host.docker`.
 
 | Env                        | JSON                  | Terminal   |
 |----------------------------|-----------------------|------------|
@@ -79,15 +79,15 @@ Docker host address. Default value is SO dependent.
 | `MG_DOCKER_HOST` | `dockerHost` | See --help |
 
 ### Resolvconf Override Name Servers
-If must comment all existing nameservers at `resolv.conf` file (Linux, MacOS) or just put DPS at the first place. 
+If must comment all existing nameservers at `resolv.conf` file (Linux, MacOS) or just put DPS at the first place.
 Default: true.
 
 | Env                                  | JSON                            | Terminal   |
 |--------------------------------------|---------------------------------|------------|
 | `MG_RESOLVCONF_OVERRIDE_NAMESERVERS` | `resolvConfOverrideNameServers` | See --help |
 
 ### Resolvconf
-Linux/Mac resolvconf or systemd-resolved path to set DPS as default DNS. 
+Linux/Mac resolvconf or systemd-resolved path to set DPS as default DNS.
 Default: `/host/etc/systemd/resolved.conf,/host/etc/resolv.conf,/etc/systemd/resolved.conf,/etc/resolv.conf`.
 
 | Env           | JSON | Terminal   |
@@ -129,6 +129,28 @@ Default: true
 |-----------------------------------------------|-----------------------------------------|-----------|
 | MG_DOCKER_SOLVER_HOST_MACHINE_FALLBACK_ACTIVE | `dockerSolverHostMachineFallbackActive` | See -help |
 
+## Config File Path
+
+The location of the external config file (as the JSON file) can be changed by setting two variables:
+
+### Config File Path
+
+Relative or absolute path to the config file. Default: `conf/config.json`
+
+| Env                 | JSON | Terminal  |
+|---------------------|------|-----------|
+| MG_CONFIG_FILE_PATH | N/A  | See -help |
+
+### Working Dir (Optional)
+
+Is the path which will be used when **ConfigFilePath** is set as a relative path.
+Default: `DPS executing path, aka Working Directory`.
+
+| Env         | JSON | Terminal |
+|-------------|------|----------|
+| MG_WORK_DIR | N/A  | N/A      |
+
+
 ## Example JSON configuration
 
 __Version 2__

gradle.properties

@@ -1 +1 @@
-version=3.25.14-snapshot
+version=3.26.0-snapshot

src/main/docker/qemu/Dockerfile

@@ -1,9 +1,10 @@
 FROM multiarch/qemu-user-static:latest@sha256:fe60359c92e86a43cc87b3d906006245f77bfc0565676b80004cc666e4feb9f0
 
-ARG DEB_MIRROR1="http://ftp.de.debian.org/debian/pool/main/q/qemu/qemu-user-static_8.2.5+ds-2_amd64.deb"
-ARG DEB_MIRROR2="http://ftp.de.debian.org/debian/pool/main/q/qemu/qemu-user-static_8.2.5+ds-1_amd64.deb"
-ARG DEB_MIRROR3="https://ftp.debian.org/debian/pool/main/q/qemu/qemu-user-static_8.2.4+ds-1_amd64.deb"
-RUN wget ${DEB_MIRROR1} || wget ${DEB_MIRROR2} || wget ${DEB_MIRROR3}
+ARG DEB_MIRROR1="http://archive.ubuntu.com/ubuntu/pool/universe/q/qemu/qemu-user-static_8.2.2+ds-0ubuntu1.2_amd64.deb"
+ARG DEB_MIRROR2="http://ftp.de.debian.org/debian/pool/main/q/qemu/qemu-user-static_8.2.5+ds-2_amd64.deb"
+ARG DEB_MIRROR3="http://download.unesp.br/ubuntu/pool/universe/q/qemu/qemu-user-static_8.2.2+ds-0ubuntu1_amd64.deb"
+ARG DEB_MIRROR4="https://deb.sipwise.com/debian/pool/main/q/qemu/qemu-user-static_8.2.1+ds-1~bpo12+1_amd64.deb"
+RUN wget ${DEB_MIRROR1} || wget ${DEB_MIRROR2} || wget ${DEB_MIRROR3} || wget ${DEB_MIRROR4}
 
 RUN mkdir releases &&\
     dpkg-deb -X qemu-user-static_*.deb releases &&\

src/main/java/com/mageddo/dnsproxyserver/config/application/ConfigFileFinderService.java

@@ -0,0 +1,39 @@
+package com.mageddo.dnsproxyserver.config.application;
+
+import com.mageddo.dnsproxyserver.config.dataprovider.ConfigDAOCmdArgs;
+import com.mageddo.dnsproxyserver.config.dataprovider.ConfigDAOEnv;
+import com.mageddo.dnsproxyserver.config.dataprovider.vo.ConfigEnv;
+import com.mageddo.dnsproxyserver.config.dataprovider.vo.ConfigFlag;
+import com.mageddo.dnsproxyserver.utils.ObjectUtils;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.nio.file.Path;
+
+@Slf4j
+@Singleton
+@RequiredArgsConstructor(onConstructor = @__({@Inject}))
+public class ConfigFileFinderService {
+
+  private final ConfigDAOEnv configDAOEnv;
+  private final ConfigDAOCmdArgs configDAOCmdArgs;
+
+  public Path findPath(){
+    final var envConfig = this.configDAOEnv.findRaw();
+    final var argsConfig = this.configDAOCmdArgs.findRaw();
+
+    final var configFilePath = this.findConfigFilePath(envConfig, argsConfig);
+
+    final var workDir = envConfig.getWorkingDir();
+    return ConfigPathMapper.build(workDir, configFilePath);
+  }
+
+  private Path findConfigFilePath(ConfigEnv envConfig, ConfigFlag argsConfig) {
+    return ObjectUtils.firstNonNullRequiring(
+      envConfig.getConfigFilePath(),
+      argsConfig.getConfigFileAsPath()
+    );
+  }
+}

src/main/java/com/mageddo/dnsproxyserver/config/application/ConfigPathMapper.java

@@ -0,0 +1,48 @@
+package com.mageddo.dnsproxyserver.config.application;
+
+import com.mageddo.dnsproxyserver.config.dataprovider.vo.ConfigFlag;
+import com.mageddo.utils.Files;
+import com.mageddo.utils.Runtime;
+import com.mageddo.utils.Tests;
+import lombok.extern.slf4j.Slf4j;
+
+import java.nio.file.Path;
+
+@Slf4j
+class ConfigPathMapper {
+
+  public static Path build(Path workDir, Path configFilePath) {
+    final var path = build0(workDir, configFilePath);
+    log.debug("status=configPathBuilt, path={}", path);
+    return path;
+  }
+
+  private static Path build0(Path workDir, Path configPath) {
+    if (runningInTestsAndNoCustomConfigPath(configPath)) {
+      final var file = Files.createTempFileDeleteOnExit("dns-proxy-server-junit", ".json");
+      log.trace("status=runningInTests, usingEmptyFile={}", file);
+      return file;
+    }
+    if (workDir != null) {
+      return workDir
+        .resolve(configPath)
+        .toAbsolutePath()
+        ;
+    }
+    final var confRelativeToCurrDir = configPath.toAbsolutePath();
+    if (Files.exists(confRelativeToCurrDir)) {
+      return confRelativeToCurrDir;
+    }
+    return Runtime.getRunningDir()
+      .resolve(configPath)
+      .toAbsolutePath();
+  }
+
+  private static boolean runningInTestsAndNoCustomConfigPath(Path configPath) {
+    return isDefaultConfigFilePath(configPath) && Tests.inTest();
+  }
+
+  private static boolean isDefaultConfigFilePath(Path configPath) {
+    return ConfigFlag.DEFAULT_CONFIG_FILE_AS_PATH.equals(configPath);
+  }
+}

src/main/java/com/mageddo/dnsproxyserver/config/dataprovider/ConfigDAOJson.java

@@ -1,30 +1,25 @@
 package com.mageddo.dnsproxyserver.config.dataprovider;
 
 import com.mageddo.dnsproxyserver.config.Config;
+import com.mageddo.dnsproxyserver.config.application.ConfigFileFinderService;
 import com.mageddo.dnsproxyserver.config.dataprovider.mapper.ConfigJsonV2Mapper;
-import com.mageddo.utils.Tests;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 import java.nio.file.Path;
-import java.util.Arrays;
 
 @Slf4j
 @Singleton
 @RequiredArgsConstructor(onConstructor = @__({@Inject}))
 public class ConfigDAOJson implements ConfigDAO {
 
-  private final ConfigDAOEnv configDAOEnv;
-  private final ConfigDAOCmdArgs configDAOCmdArgs;
+  private final ConfigFileFinderService configFileFinderService;
 
   @Override
   public Config find() {
-    final var workDir = this.configDAOEnv.findRaw().getCurrentPath();
-    final var relativeConfigFilePath = this.configDAOCmdArgs.findRaw().getConfigPath();
-    final var configFileAbsolutePath = ConfigPathBuilder.build(workDir, relativeConfigFilePath);
-    return this.find(configFileAbsolutePath);
+    return this.find(this.configFileFinderService.findPath());
   }
 
   public Config find(Path configPath) {
@@ -33,10 +28,6 @@ public Config find(Path configPath) {
     return ConfigJsonV2Mapper.toConfig(jsonConfig, configPath);
   }
 
-  static boolean runningInTestsAndNoCustomConfigPath() {
-    return !Arrays.toString(ConfigDAOCmdArgs.getArgs()).contains("--conf-path") && Tests.inTest();
-  }
-
   @Override
   public int priority() {
     return 2;

src/main/java/com/mageddo/dnsproxyserver/config/dataprovider/ConfigPathBuilder.java

@@ -9,7 +9,7 @@
 public class ConfigFlagMapper {
   public static Config toConfig(ConfigFlag config) {
     return Config.builder()
-      .configPath(Files.pathOf(config.getConfigPath()))
+      .configPath(Files.pathOf(config.getConfigFilePath()))
       .registerContainerNames(config.getRegisterContainerNames())
       .domain(config.getDomain())
       .logFile(config.getLogToFile())

src/main/java/com/mageddo/dnsproxyserver/config/dataprovider/mapper/ConfigFlagMapper.java

@@ -47,7 +47,9 @@ public class ConfigEnv {
 
   private static final String MG_DOCKER_SOLVER_HOST_MACHINE_FALLBACK_ACTIVE = "MG_DOCKER_SOLVER_HOST_MACHINE_FALLBACK_ACTIVE";
 
-  private Path currentPath;
+  private static final String MG_CONFIG_FILE_PATH = "MG_CONFIG_FILE_PATH";
+
+  private Path workingDir;
   private String resolvConfPath;
   private String logFile;
   private String logLevel;
@@ -61,11 +63,12 @@ public class ConfigEnv {
   private Boolean noRemoteServers;
   private Integer noEntriesResponseCode;
   private Boolean dockerSolverHostMachineFallbackActive;
+  private Path configFilePath;
 
   public static ConfigEnv fromEnv() {
     return ConfigEnv
       .builder()
-      .currentPath(Envs.getPathOrNull(MG_WORK_DIR))
+      .workingDir(Envs.getPathOrNull(MG_WORK_DIR))
       .resolvConfPath(Envs.getStringOrDefault(MG_RESOLVCONF, DEFAULT_RESOLV_CONF_PATH))
       .logFile(findLogFilePath())
       .logLevel(Envs.getStringOrNull(MG_LOG_LEVEL))
@@ -79,6 +82,7 @@ public static ConfigEnv fromEnv() {
       .noRemoteServers(Envs.getBooleanOrNull(MG_NO_REMOTE_SERVERS))
       .noEntriesResponseCode(Envs.getIntegerOrNull(MG_NO_ENTRIES_RESPONSE_CODE))
       .dockerSolverHostMachineFallbackActive(Envs.getBooleanOrNull(MG_DOCKER_SOLVER_HOST_MACHINE_FALLBACK_ACTIVE))
+      .configFilePath(Envs.getPathOrNull(MG_CONFIG_FILE_PATH))
       .build();
   }