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#import <Foundation/Foundation.h>
#import "NSFileManager+Custom.h"
@implementation NSFileManager (Custom)
/**
* Scans the <code>PATH</code> environment variable for aFilename and
* returns the full path, or nil if aFilename cannot be found.
*/
- (NSString *)locateExecutable:(NSString *)aFilename;
{
NSString *fullPath = nil;
NSDictionary *environment = nil;
NSString *path = nil;
NSScanner *pathScanner;
BOOL found = NO;
environment = [[NSProcessInfo processInfo] environment];
path = [environment objectForKey:@"PATH"];
pathScanner = [NSScanner scannerWithString:path];
while (([pathScanner isAtEnd] == NO) && (found == NO))
{
NSString *directory = nil;
[pathScanner scanUpToString:@":" intoString:&directory];
[pathScanner scanString:@":" intoString:NULL];
fullPath = [directory stringByAppendingPathComponent:aFilename];
found = [self fileExistsAtPath:fullPath];
}
if (found == NO)
{
fullPath = nil;
}
return fullPath;
}
/**
* creates a temporary directory unique for Zipper.
*/
- (NSString *)createTemporaryDirectory;
{
int attempt = 0;
NSParameterAssert(NSTemporaryDirectory() != nil);
// don't get caught in an endless loop. If we need more than 500 attempts
// to find a temp dir, something's wrong anyway
while (attempt < 500)
{
NSString *tempDir;
NSString *tempPath;
tempDir = [NSString stringWithFormat:@"Zipper-%d", attempt++];
tempPath = [NSString pathWithComponents:[NSArray arrayWithObjects:
NSTemporaryDirectory(), tempDir, nil]];
if ([self fileExistsAtPath:tempPath] == NO)
{
if ([self createDirectoryAtPath:tempPath attributes:nil])
{
return tempPath;
}
}
}
[NSException raise:NSInvalidArgumentException format:@"Could not create temporary directory"];
return nil;
}
- (void)createDirectoryPathWithParents:(NSString *)aPath
{
NSString *parent;
BOOL isDir;
parent = [aPath stringByDeletingLastPathComponent];
if (([self fileExistsAtPath:parent isDirectory:&isDir] && isDir) == NO)
{
// parent path does not exist, create it first
[self createDirectoryPathWithParents:parent];
}
// parent exists, create directory
[self createDirectoryAtPath:aPath attributes:nil];
}
@end
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