fix(terminal): bootstrap packages are not installed on first install

app/src/main/java/com/itsaky/androidide/activities/TerminalActivity.kt

@@ -52,8 +52,8 @@ class TerminalActivity : TermuxActivity() {
   }
 
   override fun onServiceConnected(componentName: ComponentName?, service: IBinder?) {
-    writeSourcesList()
     super.onServiceConnected(componentName, service)
+    writeSourcesList()
   }
 
   private fun writeSourcesList() {

termux/termux-app/src/main/java/com/termux/app/TermuxInstaller.java

@@ -33,10 +33,13 @@ import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
+import static com.itsaky.androidide.utils.Environment.PREFIX;
+import static com.itsaky.androidide.utils.Environment.SHELL;
 import static com.termux.shared.termux.TermuxConstants.TERMUX_PREFIX_DIR;
 import static com.termux.shared.termux.TermuxConstants.TERMUX_PREFIX_DIR_PATH;
 import static com.termux.shared.termux.TermuxConstants.TERMUX_STAGING_PREFIX_DIR;
 import static com.termux.shared.termux.TermuxConstants.TERMUX_STAGING_PREFIX_DIR_PATH;
+import static com.termux.shared.termux.shell.TermuxShellUtils.shellExists;
 
 /**
  * Install the Termux bootstrap packages if necessary by following the below steps:
@@ -102,8 +105,7 @@ public final class TermuxInstaller {
             return;
         }
 
-        // If prefix directory exists, even if its a symlink to a valid directory and symlink is not broken/dangling
-        if (FileUtils.directoryFileExists(TERMUX_PREFIX_DIR_PATH, true)) {
+        if (shellExists(false)) {
             if (TermuxFileUtils.isTermuxPrefixDirectoryEmpty()) {
                 Logger.logInfo(LOG_TAG, "The termux prefix directory \"" + TERMUX_PREFIX_DIR_PATH + "\" exists but is empty or only contains specific unimportant files.");
             } else {

termux/termux-shared/src/main/java/com/termux/shared/shell/command/environment/AndroidShellEnvironment.java

@@ -31,7 +31,11 @@ public class AndroidShellEnvironment extends UnixShellEnvironment {
     @NonNull
     @Override
     public HashMap<String, String> getEnvironment(@NonNull Context currentPackageContext, boolean isFailSafe) {
-        HashMap<String, String> environment = new HashMap<>(Environment.getEnvironment());
+        HashMap<String, String> environment = new HashMap<>();
+
+        if (!isFailSafe) {
+            environment.putAll(Environment.getEnvironment());
+        }
 
         environment.put(ENV_HOME, "/");
         environment.put(ENV_LANG, "en_US.UTF-8");

termux/termux-shared/src/main/java/com/termux/shared/termux/shell/TermuxShellUtils.java

@@ -3,13 +3,16 @@ package com.termux.shared.termux.shell;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.itsaky.androidide.utils.Environment;
 import com.termux.shared.errors.Error;
 import com.termux.shared.file.filesystem.FileTypes;
+import com.termux.shared.shell.command.environment.UnixShellEnvironment;
 import com.termux.shared.termux.TermuxConstants;
 import com.termux.shared.file.FileUtils;
 import com.termux.shared.logger.Logger;
 import com.termux.shared.termux.settings.properties.TermuxAppSharedProperties;
 
+import com.termux.shared.termux.shell.command.environment.TermuxShellEnvironment;
 import org.apache.commons.io.filefilter.TrueFileFilter;
 
 import java.io.File;
@@ -23,6 +26,17 @@ public class TermuxShellUtils {
 
     private static final String LOG_TAG = "TermuxShellUtils";
 
+    public static boolean shellExists(boolean failsafe) {
+        for (String shellBinary : UnixShellEnvironment.LOGIN_SHELL_BINARIES) {
+            File shellFile = new File(Environment.PREFIX, shellBinary);
+            if (shellFile.canExecute()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Setup shell command arguments for the execute. The file interpreter may be prefixed to
      * command arguments if needed.