@Invisible
@Internal
public static String setwd(@Current Context context, String workingDirectoryName)
throws FileSystemException {
FileObject newWorkingDirectory = context.resolveFile(workingDirectoryName);
if (!newWorkingDirectory.exists() || newWorkingDirectory.getType() != FileType.FOLDER) {
throw new EvalException("cannot change working directory");
}
String previous = context.getSession().getWorkingDirectory().getName().getURI();
context.getSession().setWorkingDirectory(newWorkingDirectory);
return previous;
}
@Internal("Sys.setenv")
public static LogicalVector setEnvironment(
@Current Context context, StringVector names, StringVector values) {
Map<String, String> map = context.getSession().getSystemEnvironment();
LogicalArrayVector.Builder result = new LogicalArrayVector.Builder();
for (int i = 0; i != names.length(); ++i) {
map.put(names.getElementAsString(i), values.getElementAsString(i));
result.add(true);
}
return result.build();
}
@Internal("Sys.getenv")
public static StringVector getEnvironment(
@Current Context context, StringVector names, String unset) {
StringVector.Builder result = new StringArrayVector.Builder();
Map<String, String> map = context.getSession().getSystemEnvironment();
if (names.length() == 0) {
for (Map.Entry<String, String> entry : map.entrySet()) {
result.add(entry.getKey() + "=" + entry.getValue());
}
} else {
for (String name : names) {
String value = map.get(name);
result.add(value == null ? unset : value);
}
}
return result.build();
}
@Internal("system")
public static SEXP system(
@Current Context context, String command, int flag, SEXP stdin, SEXP stdout, SEXP stderr)
throws IOException, InterruptedException {
boolean invisible = (flag >= 20 && flag < 29);
boolean minimized = (flag >= 10 && flag < 19);
List<String> args = parseArgs(command);
ProcessBuilder builder = new ProcessBuilder(args);
FileObject workingDir = context.getSession().getWorkingDirectory();
if (workingDir instanceof LocalFile) {
File localDir = new File(workingDir.getURL().getFile());
builder.directory(localDir);
}
Process process = builder.start();
process.waitFor();
int exitValue = process.exitValue();
return new IntArrayVector(exitValue);
}
/**
* Returns an absolute filename representing the current working directory of the R process;
* setwd(dir) is used to set the working directory to dir.
*
* <p>Renjin maintains its own internal pointer to the working directory which lives in {@link
* org.renjin.eval.Session}
*
* @param context the current call Context
* @return an absolute filename representing the current working directory
*/
@Internal
public static String getwd(@Current Context context) {
return context.getSession().getWorkingDirectory().getName().getURI();
}
@Internal
public static String getRHome(@Current Context context) throws URISyntaxException {
return context.getSession().getHomeDirectory();
}
@Internal
public static StringVector commandArgs(@Current Context context) {
return context.getSession().getCommandLineArguments();
}