Add a way to retrieve values from .git/config files

This introduces the PBGitConfig class. It is KVC compliant as far
as I can see, in that you can actually bind to it in IB and use
ValueForKeyPath to retrieve values. It currently only handles
strings; it should be possible to add functions to process
booleans and numbers to it.

Author: pieter

GitX.xcodeproj/project.pbxproj

@@ -58,6 +58,7 @@
 		F5B721C40E05CF7E00AF29DC /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = F5B721C20E05CF7E00AF29DC /* MainMenu.xib */; };
 		F5C007750E731B48007B84B2 /* PBGitRef.m in Sources */ = {isa = PBXBuildFile; fileRef = F5C007740E731B48007B84B2 /* PBGitRef.m */; };
 		F5C6F68D0E65FF9300478D97 /* PBGitLane.m in Sources */ = {isa = PBXBuildFile; fileRef = F5C6F68C0E65FF9300478D97 /* PBGitLane.m */; };
+		F5D2DC870EA401A80034AD24 /* PBGitConfig.m in Sources */ = {isa = PBXBuildFile; fileRef = F5D2DC860EA401A80034AD24 /* PBGitConfig.m */; };
 		F5DFFA6C0E075D8800617813 /* PBEasyFS.m in Sources */ = {isa = PBXBuildFile; fileRef = F5DFFA6B0E075D8800617813 /* PBEasyFS.m */; };
 		F5E926060E8827D300056E75 /* PBViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = F5E926050E8827D300056E75 /* PBViewController.m */; };
 		F5E927F80E883E7200056E75 /* PBChangedFile.m in Sources */ = {isa = PBXBuildFile; fileRef = F5E927F70E883E7200056E75 /* PBChangedFile.m */; };
@@ -176,6 +177,8 @@
 		F5C007740E731B48007B84B2 /* PBGitRef.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBGitRef.m; sourceTree = "<group>"; };
 		F5C6F68B0E65FF9300478D97 /* PBGitLane.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBGitLane.h; sourceTree = "<group>"; };
 		F5C6F68C0E65FF9300478D97 /* PBGitLane.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBGitLane.m; sourceTree = "<group>"; };
+		F5D2DC850EA401A80034AD24 /* PBGitConfig.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBGitConfig.h; sourceTree = "<group>"; };
+		F5D2DC860EA401A80034AD24 /* PBGitConfig.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBGitConfig.m; sourceTree = "<group>"; };
 		F5DFFA6A0E075D8800617813 /* PBEasyFS.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBEasyFS.h; sourceTree = "<group>"; };
 		F5DFFA6B0E075D8800617813 /* PBEasyFS.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBEasyFS.m; sourceTree = "<group>"; };
 		F5E926040E8827D300056E75 /* PBViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBViewController.h; sourceTree = "<group>"; };
@@ -336,6 +339,8 @@
 				F5945E160E02B0C200706420 /* PBGitRepository.m */,
 				F53C4DF50E97FC630022AD59 /* PBGitBinary.h */,
 				F53C4DF60E97FC630022AD59 /* PBGitBinary.m */,
+				F5D2DC850EA401A80034AD24 /* PBGitConfig.h */,
+				F5D2DC860EA401A80034AD24 /* PBGitConfig.m */,
 			);
 			name = Git;
 			sourceTree = "<group>";
@@ -596,6 +601,7 @@
 				F56244090E9684B0002B6C44 /* PBUnsortableTableHeader.m in Sources */,
 				F53C4DF70E97FC630022AD59 /* PBGitBinary.m in Sources */,
 				F593DF780E9E636C003A8559 /* PBFileChangesTableView.m in Sources */,
+				F5D2DC870EA401A80034AD24 /* PBGitConfig.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

PBGitConfig.h

@@ -0,0 +1,19 @@
+//
+//  PBGitConfig.h
+//  GitX
+//
+//  Created by Pieter de Bie on 14-10-08.
+//  Copyright 2008 Pieter de Bie. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+#import "PBGitBinary.h"
+#import "PBEasyPipe.h"
+
+@interface PBGitConfig : NSObject {
+	NSString *repositoryPath;
+}
+
+- init;
+- initWithRepository:(NSString *)path;
+@end

PBGitConfig.m

@@ -0,0 +1,91 @@
+//
+//  PBGitConfig.m
+//  GitX
+//
+//  Created by Pieter de Bie on 14-10-08.
+//  Copyright 2008 Pieter de Bie. All rights reserved.
+//
+
+#import "PBGitConfig.h"
+
+
+@implementation PBGitConfig
+
+- init
+{
+	repositoryPath = nil;
+	return self;
+}
+
+- initWithRepository:(NSString *)path
+{
+	repositoryPath = path;
+	return self;
+}
+
+- (void) writeValue:(NSString *)value forKey:(NSString *)key global:(BOOL)global
+{
+	[self willChangeValueForKey:[key substringToIndex:[key rangeOfString:@"."].location]];
+
+	NSMutableArray *array = [NSMutableArray arrayWithObject:@"config"];
+	if (global)
+		[array addObject:@"--global"];
+	else {
+		[array addObject:@"-f"];
+		[array addObject:[repositoryPath stringByAppendingString:@"/config"]];
+	}
+
+	[array addObject:key];
+	[array addObject:value];
+
+	int ret;
+	[PBEasyPipe outputForCommand:[PBGitBinary path]	withArgs:array inDir:nil retValue:&ret];
+	if (ret)
+		NSLog(@"Writing to config file failed!");
+	[self didChangeValueForKey:[key substringToIndex:[key rangeOfString:@"."].location]];
+}
+
+- valueForKeyPath:(NSString *)path
+{
+	NSMutableArray *arguments = [NSMutableArray array];
+	if (repositoryPath)
+		[arguments addObject:[NSString stringWithFormat:@"--git-dir=%@", repositoryPath]];
+
+	[arguments addObject:@"config"];
+	[arguments addObject:@"--get"];
+	[arguments addObject:path];
+
+	int ret;
+	NSString *value = [PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];
+
+	if (ret)
+		return nil;
+
+	return value;
+}
+
+- (void) setValue:(id)value forKeyPath:(NSString *)path
+{
+	// Check if the config option is local. In that case,
+	// write it local
+	if (repositoryPath) {
+		NSMutableArray *arguments = [NSMutableArray arrayWithObjects:@"config", @"-f", [repositoryPath stringByAppendingString:@"/config"], @"--get", path, nil];
+		int ret;
+		[PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];
+
+		if (!ret) // it's local
+			return [self writeValue:value forKey:path global:NO];
+	}
+
+	// Check if it exists globally. In that case, write it as a global
+
+	NSArray *arguments = [NSArray arrayWithObjects:@"config", @"--global", @"--get", path];
+	int ret;
+	[PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];
+	if (!ret) // It exists globally
+		return [self writeValue:value forKey:path global:YES];
+
+	// It doesn't exist at all. Write it locally.
+	[self writeValue:value forKey:path global:NO];
+}
+@end

PBGitRepository.h

@@ -9,11 +9,13 @@
 #import <Cocoa/Cocoa.h>
 #import "PBGitRevList.h"
 #import "PBGitRevSpecifier.h"
+#import "PBGitConfig.h"
 
 extern NSString* PBGitRepositoryErrorDomain;
 
 @interface PBGitRepository : NSDocument {
 	PBGitRevList* revisionList;
+	PBGitConfig *config;
 
 	BOOL hasChanged;
 	NSMutableArray* branches;
@@ -54,6 +56,7 @@ extern NSString* PBGitRepositoryErrorDomain;
 
 @property (assign) BOOL hasChanged;
 @property (readonly) NSWindowController *windowController;
+@property (readonly) PBGitConfig *config;
 @property (retain) PBGitRevList* revisionList;
 @property (assign) NSMutableArray* branches;
 @property (assign) NSIndexSet* currentBranch;

PBGitRepository.m

@@ -20,7 +20,7 @@
 
 @implementation PBGitRepository
 
-@synthesize revisionList, branches, currentBranch, refs, hasChanged;
+@synthesize revisionList, branches, currentBranch, refs, hasChanged, config;
 
 - (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError
 {
@@ -114,6 +114,7 @@ - (BOOL)readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)type
 
 - (void) setup
 {
+	config = [[PBGitConfig alloc] initWithRepository:self.fileURL.path];
 	self.branches = [NSMutableArray array];
 	[self reloadRefs];
 	revisionList = [[PBGitRevList alloc] initWithRepository:self];