Merge pull request 'Add support for CWTCH_DIR env var' (#101) from cwtchDirEnv into trunk

Reviewed-on: #101
Reviewed-by: Sarah Jamie Lewis <sarah@openprivacy.ca>

LIBCWTCH-GO.version

@@ -1 +1 @@
-v1.0.0-25-g801a805-2021-07-07-16-10
+v1.0.0-27-g4d218df-2021-07-07-23-27

README.md

@@ -11,10 +11,12 @@ This README covers build instructions, for information on Cwtch itself please go
 - Linux: Available from [https://cwtch.im/download/](https://cwtch.im/download/) as a .tar.gz
     - `install.home.sh` installs the app into your home directory
     - `install.sys.sh` as root to install system wide
+    - or run out of the unziped directory
 
 ## Running
 
-Cwtch logging is controlable with the following environment variables:
+Cwtch processes the following environment variables:
+- `CWTCH_HOME=` overrides the default storage path of `~/.cwtch` with what ever you choose
 - `LOG_FILE=` will reroute all of libcwtch-go's logging to the specified file instead of the console 
 - `LOG_LEVEL=debug` will set the log level to debug instead of info
 

lib/cwtch/ffi.dart

@@ -89,7 +89,7 @@ class CwtchFfi implements Cwtch {
     String bundledTor = "";
     Map<String, String> envVars = Platform.environment;
     if (Platform.isLinux) {
-      home = (envVars['HOME'])!;
+      home = envVars['HOME']!;
       if (await File("linux/tor").exists()) {
         bundledTor = "linux/tor";
       } else if (await File("lib/tor").exists()) {
@@ -102,10 +102,11 @@ class CwtchFfi implements Cwtch {
         bundledTor = "tor";
       }
     } else if (Platform.isWindows) {
-      home = (envVars['UserProfile'])!;
+      home = envVars['UserProfile']!;
       bundledTor = "Tor\\Tor\\tor.exe";
     }
-    var cwtchDir = path.join(home, ".cwtch");
+
+    var cwtchDir = envVars['CWTCH_HOME'] ?? path.join(home, ".cwtch");
     if (EnvironmentConfig.BUILD_VER == dev_version) {
       cwtchDir = path.join(cwtchDir, "dev");
     }