source: release-kits/shared/linux/wrapper.cpp@ 19327

#include <iostream>
#include <fstream>
#include <iomanip>
#include <cstdlib>

using namespace std;

#include "wrapper.h"
#include "libsearch4j.h"

bool extract_bundled_file( const char[], int, char*, bool );

int main(int argc, char** argv) {

    string scratch = (getenv("TMPDIR") == NULL) ? "/tmp" : getenv("TMPDIR");
    string tempdir = scratch + "/@[email protected]"; //temporary directory where we will store extracted files
    string jarfile = tempdir + "/@[email protected]"; //where we will store the jar file
    string javafile = tempdir + "/@java.installer@"; //where we will store the java tar file
    bool succeeded = false;
    bool textMode = false;

    //parse arguments
    for ( int i=0; i<argc; i++ ) {
        if ( strcmp( argv[i], "text" ) == 0 ) {
            textMode = true;
        }
    }


    //create the temp folder
    cout << "Creating temp directory..." << endl;
    succeeded = ( 0 == system( ("mkdir " + tempdir).c_str() ) );
    if ( !succeeded ) {
        cout << "Failed to create the temp directory '" << tempdir << "'. " <<
         "Check that it does not already exist. Also check that you have write " <<
         "permissions to '" << scratch << "', or set the environment variable TMPDIR to " <<
         "a directory where you do have write permissions." <<
         endl;

        cout << "Exiting" << endl;
        return 1;
    }

    //extract files
    cout << "Extracting installer jar..." << endl;
    succeeded = extract_bundled_file( @installer.name@jar, sizeof(@installer.name@jar), (char*)jarfile.c_str(), false);

    #ifdef java_is_bundled
    cout << "Preparing Greenstone installer..." << endl;
    succeeded = extract_bundled_file( java, sizeof(java), (char*)javafile.c_str(), true ) && succeeded;
    #endif
        
    if ( !succeeded ) {
        cout << "Failed to extract one or more resources" << endl;
        cout << "This installer may not have sufficient file permissions to write it to disk" << endl;
        cout << "Or, the files may be corrupt or missing from this executable" << endl;
        cout << "Exiting" << endl;
        return 1;
    }

    //change to the temp directory
    chdir( tempdir.c_str() );

    #ifdef java_is_bundled
    succeeded = (system( "/bin/sh -c ./@java.installer@ > /dev/null" ) == 0);
    succeeded = succeeded && ( system( "tar -xf jre.tar" ) == 0 );
    if ( !succeeded ) {
        cout << "Failed to extract the bundled java archive to the temp directory" << endl;
        cout << "You need the tar program on your PATH" << endl;
        cout << "Exiting" << endl;
        return 1;
    }
    #endif

    //check if an appropriate java is found
    Jvm minimum; minimum.setVersionFromString( "@java.min.version@" );
    string phint = "./@java.extracted@";
    string hint = "";
    Jvm foundJvm;
    bool jvmFound = find( foundJvm, true, minimum, false, false, phint, hint, false );

    //if the jvm was not found, report not found
    if ( !jvmFound ) {

        //did not find a good java
        cout << "Greenstone requires java @java.min.version@ or greater." << endl;
        
        //tell them if java is absent or just too old
        Jvm tmpJvm;
        if ( find( tmpJvm, false, minimum, false, false, phint, hint, false ) ) {
            cout << "You have java, but it is too old." << endl;
        } else {
            cout << "Could not find java on your system." << endl;
        }
        
        cout << "Install java (@java.min.version@ or greater) and set JAVA_HOME or JRE_HOME, and try again" << endl;
        #ifndef java_is_bundled
        cout << "Or, download a greentsone3 installer with bundled java and use that instead of this one" << endl;
        #endif

    //if we have found it, launch the installer
    } else {

        cout << "Launching Installer ..." << endl;
        int launch_exit_code = 0;
        launch_exit_code = system( (foundJvm.getExecutable() + " -Xmx85M -jar @[email protected]" + (textMode?" text":"") ).c_str() );

        //report how it went
        if ( launch_exit_code == 0 ) {
            cout << "Setup complete" << endl;
        } else {
            cout << "The installer exited with an error" << endl;
            cout << "Greenstone may not be correctly installed" << endl;
        }

    }

    //change to the scratch dir for the following operation
    chdir(scratch.c_str());

    //delete the temp files
    cout << "Deleting the temp directory" << endl;
    system( ("rm -rf " + tempdir).c_str() );

    return 0;

}

bool extract_bundled_file( const char data[], int size, char* filename, bool make_executable) {

    if ( size == 0 ) return false;

    //delete the file if it exists
    remove( filename );

    //open the file
    fstream binary_file( filename, ios::out|ios::binary );
    if ( !binary_file.good() ) {
        binary_file.close();
        return false;
    }

    //write the file
    binary_file.write( data, size );
    if ( !binary_file.good() ) {
        binary_file.close();
        return false;
    }

    //close the file
    binary_file.close();
    if ( !binary_file.good() ) {
        binary_file.close();
        return false;
    }

    if ( make_executable ) {
        string command = "chmod a+x " + string(filename);
        system( command.c_str() );
    }

    return true;

}