Add NLS_LANG to the list of environment variables which can change the cli locale

Author: pesse

README.md

@@ -28,7 +28,7 @@ The latest CLI is always compatible with all database frameworks of the same min
 For example CLI-3.0.4 is compatible with database framework 3.0.0-3.0.4 but not with database framework 2.x and 3.1.x.
 
 ## Localization and NLS settings
-utPLSQL-cli will use the environment variables "LC_ALL" or "LANG" to change the locale and therefore the NLS settings.
+utPLSQL-cli will use the environment variables (in that order) "NLS_LANG", "LC_ALL" or "LANG" to change the locale and therefore the NLS settings.
 If neither environment variable is available, it will use the JVM default locale.
 
 Example: to change the NLS-settings to English American, you can do the following:

src/main/java/org/utplsql/cli/LocaleInitializer.java

@@ -7,9 +7,10 @@
 /** This class makes sure the java locale is set according to the environment variables LC_ALL and LANG
  * We experienced that, in some cases, the locale was not set as expected, therefore this class implements some clear
  * rules:
- *   1. If environment variable LC_ALL is set, we try to parse its content and set locale according to its value if valid
- *   2. If environment variable LANG is set, we try to parse its content and set locale according to its value if valid
- *   3. Otherwise we use default locale
+ *   1. If environment variable NLS_LANG is set, we try to parse its content and set locale according to its value if valid
+ *   2. If environment variable LC_ALL is set, we try to parse its content and set locale according to its value if valid
+ *   3. If environment variable LANG is set, we try to parse its content and set locale according to its value if valid
+ *   4. Otherwise we use default locale
  *
  *   @author pesse
  */
@@ -21,7 +22,12 @@ class LocaleInitializer {
      *
      */
     static void initLocale() {
-        if ( !setDefaultLocale(System.getenv("LC_ALL")))
+
+        boolean localeChanged = setDefaultLocale(System.getenv("NLS_LANG"));
+
+        if ( !localeChanged )
+            localeChanged = setDefaultLocale(System.getenv("LC_ALL"));
+        if ( !localeChanged )
             setDefaultLocale(System.getenv("LANG"));
     }