Print a message after the user configured the path to Conda.

src/main/java/fiji/plugin/trackmate/util/cli/CLIUtils.java

@@ -8,12 +8,12 @@
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program. If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -33,6 +33,7 @@
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -52,50 +53,51 @@ public class CLIUtils
 
  public static final String CONDA_PATH_PREF_KEY = "trackmate.conda.path";
 
- public static Map< String, String > getEnvMap()
+ public static Map< String, String > getEnvMap() throws IOException
  {
  // Create a map to store the environment names and paths
  final Map< String, String > envMap = new HashMap<>();
- try
+ final ProcessBuilder pb;
+ if ( IJ.isWindows() )
+ pb = new ProcessBuilder( Arrays.asList( "cmd.exe", "/c", "conda", "env", "list" ) );
+ else
+ pb = new ProcessBuilder( Arrays.asList( getCondaPath(), "env", "list" ) );
+ final Process process = pb.start();
+ final BufferedReader reader = new BufferedReader( new InputStreamReader( process.getInputStream() ) );
+
+ // Read each line of output and extract the environment name and
+ // path
+ String line;
+ while ( ( line = reader.readLine() ) != null )
  {
- final ProcessBuilder pb;
- if ( IJ.isWindows() )
- pb = new ProcessBuilder( Arrays.asList( "cmd.exe", "/c", "conda", "env", "list" ) );
- else
- pb = new ProcessBuilder( Arrays.asList( getCondaPath(), "env", "list" ) );
- final Process process = pb.start();
- final BufferedReader reader = new BufferedReader( new InputStreamReader( process.getInputStream() ) );
-
- // Read each line of output and extract the environment name and
- // path
- String line;
- while ( ( line = reader.readLine() ) != null )
- {
- line = line.trim();
- if ( line.isEmpty() || line.startsWith( "#" ) || line.startsWith( "Name" ) )
- continue;
+ line = line.trim();
+ if ( line.isEmpty() || line.startsWith( "#" ) || line.startsWith( "Name" ) )
+ continue;
 
- final String[] parts = line.split( "\\s+" );
- if ( parts.length >= 2 )
- {
- final String envName = parts[ 0 ];
- final String envPath = parts[ 1 ] + "/bin/python";
- envMap.put( envName, envPath );
- }
+ final String[] parts = line.split( "\\s+" );
+ if ( parts.length >= 2 )
+ {
+ final String envName = parts[ 0 ];
+ final String envPath = parts[ 1 ] + "/bin/python";
+ envMap.put( envName, envPath );
  }
  }
- catch ( final IOException e )
- {
- e.printStackTrace();
- }
  return envMap;
  }
 
  public static List< String > getEnvList()
  {
- final List< String > l = new ArrayList<>( getEnvMap().keySet() );
- l.sort( null );
- return l;
+ try
+ {
+ final List< String > l = new ArrayList<>( getEnvMap().keySet() );
+ l.sort( null );
+ return l;
+ }
+ catch ( final IOException e )
+ {
+ e.printStackTrace();
+ }
+ return Collections.emptyList();
  }
 
  public static String getCondaPath()
@@ -158,7 +160,7 @@ public static String findDefaultCondaPath() throws IllegalArgumentException
  /**
  * Add a hook to delete the content of given path when Fiji quits. Taken
  * from https://stackoverflow.com/a/20280989/201698
- * 
+ *
  * @param path
  */
  public static void recursiveDeleteOnShutdownHook( final Path path )
@@ -244,7 +246,7 @@ else if ( !line.trim().isEmpty() )
  }
  }
 
- public static void main( final String[] args )
+ public static void main( final String[] args ) throws IOException
  {
  System.out.println( "Conda path: " + findDefaultCondaPath() );
  System.out.println( "Known environments: " + getEnvList() );

src/main/java/fiji/plugin/trackmate/util/cli/CondaCLIConfigurator.java

@@ -8,19 +8,20 @@
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program. If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
  * #L%
  */
 package fiji.plugin.trackmate.util.cli;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -121,13 +122,22 @@ protected CondaCLIConfigurator()
  * retrieve what is the path of the Python executable of this
  * env, and runs the tool as a module. It won't work if the tool
  * cannot be run as a module. No escape yet.
- * 
+ *
  * Unsure whether this works in Linux.
  */
- final String pythonPath = CLIUtils.getEnvMap().get( envname );
+ try
+ {
+ final String pythonPath = CLIUtils.getEnvMap().get( envname );
+ cmd.add( pythonPath );
+ cmd.add( "-m" );
+ }
+ catch ( final IOException e )
+ {
+ System.err.println( "Could not find the conda executable or change the conda environment.\n"
+ + "Please configure the path to your conda executable in Edit > Options > Configure TrackMate Conda path..." );
+ e.printStackTrace();
+ }
 
- cmd.add( pythonPath );
- cmd.add( "-m" );
  }
  // Split by spaces
  final String executableCommand = getCommand();

src/main/java/fiji/plugin/trackmate/util/cli/CondaPathConfigCommand.java

@@ -8,19 +8,22 @@
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program. If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
  * #L%
  */
 package fiji.plugin.trackmate.util.cli;
 
+import java.io.IOException;
+import java.util.Map;
+
 import javax.swing.JLabel;
 
 import org.scijava.command.Command;
@@ -33,6 +36,7 @@
 import fiji.plugin.trackmate.gui.Icons;
 import fiji.plugin.trackmate.util.TMUtils;
 import fiji.util.gui.GenericDialogPlus;
+import ij.IJ;
 
 @Plugin( type = Command.class,
  label = "Configure the path to the Conda executable used in TrackMate...",
@@ -73,11 +77,29 @@ public void run()
 
  condaPath = dialog.getNextString();
  prefs.put( CLIUtils.class, CLIUtils.CONDA_PATH_PREF_KEY, condaPath );
+ test();
+ }
+
+ public void test()
+ {
+ try
+ {
+ final Map< String, String > map = CLIUtils.getEnvMap();
+ final StringBuilder str = new StringBuilder();
+ str.append( "Successfully retrieved the conda environment list:\n" );
+ map.forEach( ( k, v ) -> str.append( String.format( " - %-20s → %s\n", k, v ) ) );
+ IJ.log( str.toString() );
+ }
+ catch ( final IOException e )
+ {
+ IJ.error( "Conda executable path seems to be incorrect.\n"
+ + "Error message:\n "
+ + e.getMessage() );
+ }
  }
 
  public static void main( final String[] args )
  {
  TMUtils.getContext().getService( CommandService.class ).run( CondaPathConfigCommand.class, false );
  }
-
 }