#include <u.h>#include <libc.h>#include <ctype.h> #include "git.h" int	findroot;int	showall;int	nfile;char	*file[32]; static intshowconf(char *cfg, char *sect, char *key){	char *ln, *p;	Biobuf *f;	int foundsect, nsect, nkey, found; 	if((f = Bopen(cfg, OREAD)) == nil)		return 0; 	found = 0;	nsect = sect ? strlen(sect) : 0;	nkey = strlen(key);	foundsect = (sect == nil);	while((ln = Brdstr(f, '\n', 1)) != nil){		p = strip(ln);		if(*p == '[' && sect){			foundsect = strncmp(sect, ln, nsect) == 0;		}else if(foundsect && strncmp(p, key, nkey) == 0){			p = strip(p + nkey);			if(*p != '=')				continue;			p = strip(p + 1);			print("%s\n", p);			found = 1;			if(!showall){				free(ln);				goto done;			}		}		free(ln);	}done:	return found;}  voidusage(void){	fprint(2, "usage: %s [-f file] [-r] keys..\n", argv0);	fprint(2, "\t-f:	use file 'file' (default: .git/config)\n");	fprint(2, "\t r:	print repository root\n");	exits("usage");} voidmain(int argc, char **argv){	char repo[512], *p, *s;	int i, j, nrel; 	ARGBEGIN{	case 'r':	findroot++;			break;	case 'a':	showall++;			break;	default:	usage();			break;	case 'f':		if(nfile == nelem(file))			sysfatal("too many configs");		file[nfile++]=EARGF(usage());		break;	}ARGEND; 	gitinit(repo, sizeof(repo), &nrel);	if(findroot){		print("%s\n", repo);		exits(nil);	}	if(nfile == 0){		if((file[nfile++] = smprint("%s/.git/config", repo)) == nil)			sysfatal("smprint: %r");		if((p = getenv("home")) != nil)			if((file[nfile++] = smprint("%s/lib/git/config", p)) == nil)				sysfatal("smprint: %r");		file[nfile++] = "/sys/lib/git/config";	} 	for(i = 0; i < argc; i++){		if((p = strchr(argv[i], '.')) == nil){			s = nil;			p = argv[i];		}else{			*p = 0;			p++;			s = smprint("[%s]", argv[i]);		}		for(j = 0; j < nfile; j++)			if(showconf(file[j], s, p))				break;	}	exits(nil);}