vagrant/ext/fsevents/main.m
#import <Foundation/Foundation.h>
#include <CoreServices/CoreServices.h>
#include <sys/stat.h>
#include <fcntl.h>
static CFMutableArrayRef _watchedFiles;
static FSEventStreamRef _activeStream;
static NSMutableDictionary *_fileIsWatched;
static int flagsWorthReloadingFor = \
kFSEventStreamEventFlagItemRemoved | \
kFSEventStreamEventFlagItemRenamed | \
kFSEventStreamEventFlagItemModified;
void myCallbackFunction(
ConstFSEventStreamRef streamRef,
void *clientCallBackInfo,
size_t numEvents,
void *eventPaths,
const FSEventStreamEventFlags eventFlags[],
const FSEventStreamEventId eventIds[])
{
int i, flags;
char **paths = eventPaths;
for (i = 0; i < numEvents; i++) {
flags = eventFlags[i];
if (flags & (kFSEventStreamEventFlagItemIsFile | flagsWorthReloadingFor)) {
printf("%s\n", paths[i]);
fflush(stdout);
}
}
}
void configureStream()
{
if (CFArrayGetCount(_watchedFiles) == 0) return;
if (_activeStream) {
FSEventStreamStop(_activeStream);
FSEventStreamUnscheduleFromRunLoop(_activeStream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
//CFRelease(_activeStream);
}
_activeStream = FSEventStreamCreate(NULL,
&myCallbackFunction,
NULL,
_watchedFiles,
kFSEventStreamEventIdSinceNow,
1.0, // latency
kFSEventStreamCreateFlagFileEvents);
FSEventStreamScheduleWithRunLoop(_activeStream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
FSEventStreamStart(_activeStream);
}
int maybeAddFileToWatchList(char *line)
{
CFStringRef file = CFStringCreateWithCString(NULL, line, kCFStringEncodingASCII);
struct stat buf;
if ([_fileIsWatched valueForKey:(NSString *)file]) {
return 0;
} else if (stat(line, &buf) == 0) {
[_fileIsWatched setValue:@"yes" forKey:(NSString *)file];
CFArrayAppendValue(_watchedFiles, file);
return 1;
} else {
return 0;
}
}
void handleInputFiles()
{
int anyChanges = 0;
char line[2048];
while (fgets(line, sizeof(line), stdin) != NULL) {
line[strlen(line)-1] = 0;
anyChanges |= maybeAddFileToWatchList(line);
}
if (anyChanges) {
configureStream();
}
}
void configureTimerAndRun()
{
CFRunLoopTimerRef timer = CFRunLoopTimerCreate(NULL,
0,
0.5,
0,
0,
&handleInputFiles,
NULL);
CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopDefaultMode);
CFRunLoopRun();
}
int main(int argc, const char * argv[])
{
int flags = fcntl(0, F_GETFL);
flags |= O_NONBLOCK;
fcntl(STDIN_FILENO, F_SETFL, flags);
_watchedFiles = CFArrayCreateMutable(NULL, 0, NULL);
_fileIsWatched = [[NSMutableDictionary alloc] initWithCapacity:500];
configureTimerAndRun();
return 0;
}