/*
** Copyright (c) 2010 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)
** This program is distributed in the hope that it will be useful,
** but without any warranty; without even the implied warranty of
** merchantability or fitness for a particular purpose.
**
** Author contact information:
** drh@sqlite.org
**
*******************************************************************************
**
** This file contains code used to implement the "bisect" command.
**
** This file also contains logic used to compute the closure of filename
** changes that have occurred across multiple check-ins.
*/
#include "config.h"
#include "bisect.h"
#include <assert.h>
/*
** Local variables for this module
*/
static struct {
int bad; /* The bad version */
int good; /* The good version */
} bisect;
/*
** Find the shortest path between bad and good.
*/
void bisect_path(void){
PathNode *p;
bisect.bad = db_lget_int("bisect-bad", 0);
bisect.good = db_lget_int("bisect-good", 0);
if( bisect.good>0 && bisect.bad==0 ){
path_shortest(bisect.good, bisect.good, 0, 0);
}else if( bisect.bad>0 && bisect.good==0 ){
path_shortest(bisect.bad, bisect.bad, 0, 0);
}else if( bisect.bad==0 && bisect.good==0 ){
fossil_fatal("neither \"good\" nor \"bad\" versions have been identified");
}else{
p = path_shortest(bisect.good, bisect.bad, bisect_option("direct-only"), 0);
if( p==0 ){
char *zBad = db_text(0,"SELECT uuid FROM blob WHERE rid=%d",bisect.bad);
char *zGood = db_text(0,"SELECT uuid FROM blob WHERE rid=%d",bisect.good);
fossil_fatal("no path from good ([%S]) to bad ([%S]) or back",
zGood, zBad);
}
}
}
/*
** The set of all bisect options.
*/
static const struct {
const char *zName;
const char *zDefault;
const char *zDesc;
} aBisectOption[] = {
{ "auto-next", "on", "Automatically run \"bisect next\" after each "
"\"bisect good\" or \"bisect bad\"" },
{ "direct-only", "on", "Follow only primary parent-child links, not "
"merges\n" },
};
/*
** Return the value of a boolean bisect option.
*/
int bisect_option(const char *zName){
unsigned int i;
int r = -1;
for(i=0; i<sizeof(aBisectOption)/sizeof(aBisectOption[0]); i++){
if( fossil_strcmp(zName, aBisectOption[i].zName)==0 ){
char *zLabel = mprintf("bisect-%s", zName);
char *z = db_lget(zLabel, (char*)aBisectOption[i].zDefault);
if( is_truth(z) ) r = 1;
if( is_false(z) ) r = 0;
if( r<0 ) r = is_truth(aBisectOption[i].zDefault);
free(zLabel);
break;
}
}
assert( r>=0 );
return r;
}
/*
** List a bisect path.
*/
static void bisect_list(int abbreviated){
PathNode *p;
int vid = db_lget_int("checkout", 0);
int n;
Stmt s;
int nStep;
int nHidden = 0;
bisect_path();
db_prepare(&s, "SELECT blob.uuid, datetime(event.mtime) "
" FROM blob, event"
" WHERE blob.rid=:rid AND event.objid=:rid"
" AND event.type='ci'");
nStep = path_length();
if( abbreviated ){
for(p=path_last(); p; p=p->pFrom) p->isHidden = 1;
for(p=path_last(), n=0; p; p=p->pFrom, n++){
if( p->rid==bisect.good
|| p->rid==bisect.bad
|| p->rid==vid
|| (nStep>1 && n==nStep/2)
){
p->isHidden = 0;
if( p->pFrom ) p->pFrom->isHidden = 0;
}
}
for(p=path_last(); p; p=p->pFrom){
if( p->pFrom && p->pFrom->isHidden==0 ) p->isHidden = 0;
}
}
for(p=path_last(), n=0; p; p=p->pFrom, n++){
if( p->isHidden && (nHidden || (p->pFrom && p->pFrom->isHidden)) ){
nHidden++;
continue;
}else if( nHidden ){
fossil_print(" ... %d other check-ins omitted\n", nHidden);
nHidden = 0;
}
db_bind_int(&s, ":rid", p->rid);
if( db_step(&s)==SQLITE_ROW ){
const char *zUuid = db_column_text(&s, 0);
const char *zDate = db_column_text(&s, 1);
fossil_print("%s %S", zDate, zUuid);
if( p->rid==bisect.good ) fossil_print(" GOOD");
if( p->rid==bisect.bad ) fossil_print(" BAD");
if( p->rid==vid ) fossil_print(" CURRENT");
if( nStep>1 && n==nStep/2 ) fossil_print(" NEXT");
fossil_print("\n");
}
db_reset(&s);
}
db_finalize(&s);
}
/*
** Append a new entry to the bisect log. Update the bisect-good or
** bisect-bad values as appropriate.
**
** The bisect-log consists of a list of token. Each token is an
** integer RID of a check-in. The RID is negative for "bad" check-ins
** and positive for "good" check-ins.
*/
static void bisect_append_log(int rid){
if( rid<0 ){
if( db_lget_int("bisect-bad",0)==(-rid) ) return;
db_lset_int("bisect-bad", -rid);
}else{
if( db_lget_int("bisect-good",0)==rid ) return;
db_lset_int("bisect-good", rid);
}
db_multi_exec(
"REPLACE INTO vvar(name,value) VALUES('bisect-log',"
"COALESCE((SELECT value||' ' FROM vvar WHERE name='bisect-log'),'')"
" || '%d')", rid);
}
/*
** COMMAND: bisect
**
** Usage: %fossil bisect SUBCOMMAND ...
**
** Run various subcommands useful for searching for bugs.
**
** fossil bisect bad ?VERSION?
**
** Identify version VERSION as non-working. If VERSION is omitted,
** the current checkout is marked as non-working.
**
** fossil bisect good ?VERSION?
**
** Identify version VERSION as working. If VERSION is omitted,
** the current checkout is marked as working.
**
** fossil bisect log
**
** Show a log of "good" and "bad" versions
**
** fossil bisect next
**
** Update to the next version that is halfway between the working and
** non-working versions.
**
** fossil bisect options ?NAME? ?VALUE?
**
** List all bisect options, or the value of a single option, or set the
** value of a bisect option.
**
** fossil bisect reset
**
** Reinitialize a bisect session. This cancels prior bisect history
** and allows a bisect session to start over from the beginning.
**
** fossil bisect vlist|ls|status ?--all?
**
** List the versions in between "bad" and "good".
**
** fossil bisect undo
**
** Undo the most recent "good" or "bad" command.
**
** Summary:
**
** fossil bisect bad ?VERSION?
** fossil bisect good ?VERSION?
** fossil bisect log
** fossil bisect next
** fossil bisect options
** fossil bisect reset
** fossil bisect status
** fossil bisect undo
*/
void bisect_cmd(void){
int n;
const char *zCmd;
int foundCmd = 0;
db_must_be_within_tree();
if( g.argc<3 ){
usage("bad|good|log|next|options|reset|status|undo");
}
zCmd = g.argv[2];
n = strlen(zCmd);
if( n==0 ) zCmd = "-";
if( memcmp(zCmd, "bad", n)==0 ){
int ridBad;
foundCmd = 1;
if( g.argc==3 ){
ridBad = db_lget_int("checkout",0);
}else{
ridBad = name_to_typed_rid(g.argv[3], "ci");
}
if( ridBad>0 ){
bisect_append_log(-ridBad);
if( bisect_option("auto-next") && db_lget_int("bisect-good",0)>0 ){
zCmd = "next";
n = 4;
}
}
}else if( memcmp(zCmd, "good", n)==0 ){
int ridGood;
foundCmd = 1;
if( g.argc==3 ){
ridGood = db_lget_int("checkout",0);
}else{
ridGood = name_to_typed_rid(g.argv[3], "ci");
}
if( ridGood>0 ){
bisect_append_log(ridGood);
if( bisect_option("auto-next") && db_lget_int("bisect-bad",0)>0 ){
zCmd = "next";
n = 4;
}
}
}else if( memcmp(zCmd, "undo", n)==0 ){
char *zLog;
Blob log, id;
int ridBad = 0;
int ridGood = 0;
foundCmd = 1;
int cnt = 0, i;
db_begin_transaction();
zLog = db_lget("bisect-log","");
blob_init(&log, zLog, -1);
while( blob_token(&log, &id) ){ cnt++; }
if( cnt==0 ){
fossil_fatal("no previous bisect steps to undo");
}
blob_rewind(&log);
for(i=0; i<cnt-1; i++){
int rid;
blob_token(&log, &id);
rid = atoi(blob_str(&id));
if( rid<0 ) ridBad = -rid;
else ridGood = rid;
}
db_multi_exec(
"UPDATE vvar SET value=substr(value,1,%d) WHERE name='bisect-log'",
log.iCursor-1
);
db_lset_int("bisect-bad", ridBad);
db_lset_int("bisect-good", ridGood);
db_end_transaction(0);
if( ridBad && ridGood ){
zCmd = "next";
n = 4;
}
}
/* No else here so that the above commands can morph themselves into
** a "next" command */
if( memcmp(zCmd, "next", n)==0 ){
PathNode *pMid;
bisect_path();
pMid = path_midpoint();
if( pMid==0 ){
fossil_print("bisect complete\n");
}else{
g.argv[1] = "update";
g.argv[2] = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", pMid->rid);
g.argc = 3;
g.fNoSync = 1;
update_cmd();
}
bisect_list(1);
}else if( memcmp(zCmd, "log", n)==0 ){
char *zLog = db_lget("bisect-log","");
Blob log, id;
Stmt q;
int cnt = 0;
blob_init(&log, zLog, -1);
db_prepare(&q, "SELECT substr(blob.uuid,1,16), datetime(event.mtime)"
" FROM blob, event"
" WHERE blob.rid=:rid AND event.objid=:rid"
" AND event.type='ci'");
while( blob_token(&log, &id) ){
int rid = atoi(blob_str(&id));
db_bind_int(&q, ":rid", rid<0 ? -rid : rid);
if( db_step(&q)==SQLITE_ROW ){
cnt++;
fossil_print("%3d %-4s %s %s\n", cnt, rid<0 ? "BAD" : "GOOD",
db_column_text(&q, 1), db_column_text(&q, 0));
}
db_reset(&q);
}
db_finalize(&q);
}else if( memcmp(zCmd, "options", n)==0 ){
if( g.argc==3 ){
unsigned int i;
for(i=0; i<sizeof(aBisectOption)/sizeof(aBisectOption[0]); i++){
char *z = mprintf("bisect-%s", aBisectOption[i].zName);
fossil_print(" %-15s %-6s ", aBisectOption[i].zName,
db_lget(z, (char*)aBisectOption[i].zDefault));
fossil_free(z);
comment_print(aBisectOption[i].zDesc, 27, 79);
}
}else if( g.argc==4 || g.argc==5 ){
unsigned int i;
n = strlen(g.argv[3]);
for(i=0; i<sizeof(aBisectOption)/sizeof(aBisectOption[0]); i++){
if( memcmp(g.argv[3], aBisectOption[i].zName, n)==0 ){
char *z = mprintf("bisect-%s", aBisectOption[i].zName);
if( g.argc==5 ){
db_lset(z, g.argv[4]);
}
fossil_print("%s\n", db_lget(z, (char*)aBisectOption[i].zDefault));
fossil_free(z);
break;
}
}
if( i>=sizeof(aBisectOption)/sizeof(aBisectOption[0]) ){
fossil_fatal("no such bisect option: %s", g.argv[3]);
}
}else{
usage("bisect option ?NAME? ?VALUE?");
}
}else if( memcmp(zCmd, "reset", n)==0 ){
db_multi_exec(
"DELETE FROM vvar WHERE name IN "
" ('bisect-good', 'bisect-bad', 'bisect-log')"
);
}else if( memcmp(zCmd, "vlist", n)==0
|| memcmp(zCmd, "ls", n)==0
|| memcmp(zCmd, "status", n)==0
){
int fAll = find_option("all", 0, 0)!=0;
bisect_list(!fAll);
}else if( !foundCmd ){
usage("bad|good|log|next|options|reset|status|undo");
}
}