Rename EXTRA_QT_PLUGINS to EXTRA_QT_MODULES

Fixes: linuxdeploy#121

Author: dantti

Diff for: README.md

@@ -56,8 +56,8 @@ Just like all linuxdeploy plugins, the Qt plugin's behavior can be configured so
 
 **Qt specific:**
 - `$QMAKE=/path/to/my/qmake`: use another `qmake` binary to detect paths of plugins and other resources (usually doesn't need to be set manually, most Qt environments ship scripts changing `$PATH`)
-- `$EXTRA_QT_PLUGINS=pluginA;pluginB`: Plugins to deploy even if not found automatically by linuxdeploy-plugin-qt
-  - example: `EXTRA_QT_PLUGINS=svg;` if you want to use the module [QtSvg](https://doc.qt.io/qt-5/qtsvg-index.html)
+- `$EXTRA_QT_MODULES=pluginA;pluginB`: Modules to deploy even if not found automatically by linuxdeploy-plugin-qt
+  - example: `EXTRA_QT_MODULES=svg;` if you want to use the module [QtSvg](https://doc.qt.io/qt-5/qtsvg-index.html)
 - `$EXTRA_PLATFORM_PLUGINS=platformA;platformB`: Platforms to deploy in addition to `libqxcb.so`. Platform must be available from `QT_INSTALL_PLUGINS/platforms`.
 
 QML related:

Diff for: src/main.cpp

@@ -37,9 +37,9 @@ int main(const int argc, const char *const *const argv) {
     args::HelpFlag help(parser, "help", "Display this help text", {'h', "help"});
 
     args::ValueFlag<fs::path> appDirPath(parser, "appdir path", "Path to an existing AppDir", {"appdir"});
-    args::ValueFlagList<std::string> extraPlugins(parser, "plugin",
-                                                  "Extra Qt plugin to deploy (specified by name, filename or path)",
-                                                  {'p', "extra-plugin"});
+    args::ValueFlagList<std::string> extraModules(parser, "module",
+                                                  "Extra Qt module to deploy (specified by name, filename or path)",
+                                                  {'m', "extra-module"});
 
     args::Flag pluginType(parser, "", "Print plugin type and exit", {"plugin-type"});
     args::Flag pluginApiVersion(parser, "", "Print plugin API version and exit", {"plugin-api-version"});
@@ -199,18 +199,18 @@ int main(const int argc, const char *const *const argv) {
                                          }) != libraryNames.end();
                  });
 
-    std::vector<std::string> extraPluginsFromEnv;
-    const auto* const extraPluginsFromEnvData = getenv("EXTRA_QT_PLUGINS");
-    if (extraPluginsFromEnvData != nullptr)
-        extraPluginsFromEnv = linuxdeploy::util::split(std::string(extraPluginsFromEnvData), ';');
+    std::vector<std::string> extraModulesFromEnv;
+    const auto* const extraModulesFromEnvData = getenv("EXTRA_QT_MODULES") ? getenv("EXTRA_QT_MODULES") : getenv("EXTRA_QT_PLUGINS");
+    if (extraModulesFromEnvData != nullptr)
+        extraModulesFromEnv = linuxdeploy::util::split(std::string(extraModulesFromEnvData), ';');
 
-    for (const auto& pluginsList : {static_cast<std::vector<std::string>>(extraPlugins.Get()), extraPluginsFromEnv}) {
+    for (const auto& modulesList : {static_cast<std::vector<std::string>>(extraModules.Get()), extraModulesFromEnv}) {
         std::copy_if(qtModules.begin(), qtModules.end(), std::back_inserter(extraQtModules),
-            [&matchesQtModule, &libraryNames, &pluginsList](const QtModule &module) {
-                return std::find_if(pluginsList.begin(), pluginsList.end(),
+            [&matchesQtModule, &libraryNames, &modulesList](const QtModule &module) {
+                return std::find_if(modulesList.begin(), modulesList.end(),
                     [&matchesQtModule, &module](const std::string &libraryName) {
                         return matchesQtModule(libraryName, module);
-                    }) != pluginsList.end();
+                    }) != modulesList.end();
             }
         );
     }