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//
// main.c
// igv-launcher
//
// Created by James Robinson on 9/14/24.
//
// Launch IGV on MacOS (https://github.com/igvteam/igv).
//
// Code adapted from https://incenp.org/notes/2023/universal-java-app-on-macos.html
//
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <string.h>
#include <err.h>
#include <mach-o/dyld.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <CoreFoundation/CoreFoundation.h>
/* Remove the last n components of a pathname. The pathname
* is modified in place. Returns 0 if the requested number
* of components have been removed, -1 otherwise. */
static int remove_last_component(char *buffer , unsigned n)
{
char *last_slash = NULL;
while ( n-- > 0 ) {
if ( (last_slash = strrchr(buffer, '/')) )
*last_slash = '\0';
}
return last_slash ? 0 : -1;
}
/*
* Test if a given path exists and if it is a directory.
* It returns 1 if given path is directory and exists
* otherwise returns 0.
*/
static int isDirectoryExists(const char *path)
{
struct stat stats;
stat(path, &stats);
// Check for file existence
if (S_ISDIR(stats.st_mode))
return 1;
return 0;
}
static int simpleLauncher(int argc, char **argv)
{
char app_path[PATH_MAX];
uint32_t path_size = PATH_MAX;
int ret = 0;
(void) argc;
(void) argv;
/* Get the path to the "Contents" directory. */
if ( _NSGetExecutablePath(app_path, &path_size) == -1 )
err(EXIT_FAILURE, "Cannot get application directory");
if ( remove_last_component(app_path, 2) == -1 )
errx(EXIT_FAILURE, "Cannot get application directory");
/* Move to that directory. */
if ( chdir(app_path) == -1 )
err(EXIT_FAILURE, "Cannot change current directory");
char* cmd;
/* See if there is a bundled JDK */
if(isDirectoryExists("jdk-21")) {
char jdkPath[2048] = {'\0'};
snprintf(jdkPath, sizeof(jdkPath), "%s/jdk-21", app_path);
setenv("JAVA_HOME", jdkPath, true);
char javaPath[2048] = {'\0'};
snprintf(javaPath, sizeof(javaPath), "%s/bin/java", jdkPath);
cmd = javaPath;
printf("Using bundled JDK");
//PATH=$JAVA_HOME/bin:$PATH
} else {
cmd = "java";
printf("Using System JDK\n");
}
/* Get user defined extra arguments, if any */
char extraArgumentsPath[2048] = {'\0'};
const char *homeDir = getenv("HOME");
snprintf(extraArgumentsPath, sizeof(extraArgumentsPath), "%s/.igv/java_arguments", homeDir);
if(access(extraArgumentsPath, F_OK) == 0) {
char extraArguments[2048] = {'\0'};
snprintf(extraArguments, sizeof(extraArguments), "@%s", extraArgumentsPath);
/* Run IGV with user extra arguments */
char* args[] = {
"java",
"-showversion",
"--module-path=Java/lib",
"-Xmx8g",
"@Java/igv.args",
"-Xdock:name=IGV",
"-Xdock:icon=Resources/IGV_64.png",
"-Dapple.laf.useScreenMenuBar=true",
extraArguments,
"--module=org.igv/org.broad.igv.ui.Main",
NULL};
ret = execvp(cmd, args);
return ret;
} else {
/* Run IGV without user extra arguments */
char* args[] = {
"java",
"-showversion",
"--module-path=Java/lib",
"-Xmx8g",
"@Java/igv.args",
"-Xdock:name=IGV",
"-Xdock:icon=Resources/IGV_64.png",
"--module=org.igv/org.broad.igv.ui.Main",
NULL};
ret = execvp(cmd, args);
return ret;
}
}
int main(int argc, char **argv)
{
return simpleLauncher(argc, argv);
}
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