// Copyright 2015 Google Inc. All rights reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build ignore
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "affinity.h"
#include "dep.h"
#include "eval.h"
#include "exec.h"
#include "file.h"
#include "file_cache.h"
#include "fileutil.h"
#include "find.h"
#include "flags.h"
#include "func.h"
#include "log.h"
#include "ninja.h"
#include "parser.h"
#include "regen.h"
#include "stats.h"
#include "stmt.h"
#include "string_piece.h"
#include "stringprintf.h"
#include "strutil.h"
#include "symtab.h"
#include "timeutil.h"
#include "var.h"
static void Init() {
InitSymtab();
InitFuncTable();
InitDepNodePool();
InitParser();
}
static void Quit() {
ReportAllStats();
QuitParser();
QuitDepNodePool();
QuitFuncTable();
QuitSymtab();
}
static void ReadBootstrapMakefile(const vector<Symbol>& targets,
vector<Stmt*>* stmts) {
string bootstrap = (
"CC?=cc\n"
#if defined(__APPLE__)
"CXX?=c++\n"
#else
"CXX?=g++\n"
#endif
"AR?=ar\n"
// Pretend to be GNU make 3.81, for compatibility.
"MAKE_VERSION?=3.81\n"
"KATI?=ckati\n"
// Overwrite $SHELL environment variable.
"SHELL=/bin/sh\n"
// TODO: Add more builtin vars.
// http://www.gnu.org/software/make/manual/make.html#Catalogue-of-Rules
// The document above is actually not correct. See default.c:
// http://git.savannah.gnu.org/cgit/make.git/tree/default.c?id=4.1
".c.o:\n"
"\t$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<\n"
".cc.o:\n"
"\t$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<\n"
// TODO: Add more builtin rules.
);
if (g_flags.generate_ninja) {
bootstrap += StringPrintf("MAKE?=make -j%d\n",
g_flags.num_jobs <= 1 ? 1 : g_flags.num_jobs / 2);
} else {
bootstrap += StringPrintf("MAKE?=%s\n",
JoinStrings(g_flags.subkati_args, " ").c_str());
}
bootstrap += StringPrintf("MAKECMDGOALS?=%s\n",
JoinSymbols(targets, " ").c_str());
char cwd[PATH_MAX];
if (!getcwd(cwd, PATH_MAX)) {
fprintf(stderr, "getcwd failed\n");
CHECK(false);
}
bootstrap += StringPrintf("CURDIR:=%s\n", cwd);
Parse(Intern(bootstrap).str(), Loc("*bootstrap*", 0), stmts);
}
static void SetVar(StringPiece l, VarOrigin origin) {
size_t found = l.find('=');
CHECK(found != string::npos);
Symbol lhs = Intern(l.substr(0, found));
StringPiece rhs = l.substr(found + 1);
lhs.SetGlobalVar(
new RecursiveVar(NewLiteral(rhs.data()), origin, rhs.data()));
}
extern "C" char** environ;
static int Run(const vector<Symbol>& targets,
const vector<StringPiece>& cl_vars,
const string& orig_args) {
double start_time = GetTime();
if (g_flags.generate_ninja && (g_flags.regen || g_flags.dump_kati_stamp)) {
ScopedTimeReporter tr("regen check time");
if (!NeedsRegen(start_time, orig_args)) {
fprintf(stderr, "No need to regenerate ninja file\n");
return 0;
}
if (g_flags.dump_kati_stamp) {
printf("Need to regenerate ninja file\n");
return 0;
}
ClearGlobCache();
}
SetAffinityForSingleThread();
MakefileCacheManager* cache_mgr = NewMakefileCacheManager();
Intern("MAKEFILE_LIST").SetGlobalVar(
new SimpleVar(StringPrintf(" %s", g_flags.makefile), VarOrigin::FILE));
for (char** p = environ; *p; p++) {
SetVar(*p, VarOrigin::ENVIRONMENT);
}
Evaluator* ev = new Evaluator();
vector<Stmt*> bootstrap_asts;
ReadBootstrapMakefile(targets, &bootstrap_asts);
ev->set_is_bootstrap(true);
for (Stmt* stmt : bootstrap_asts) {
LOG("%s", stmt->DebugString().c_str());
stmt->Eval(ev);
}
ev->set_is_bootstrap(false);
for (StringPiece l : cl_vars) {
SetVar(l, VarOrigin::COMMAND_LINE);
}
{
ScopedTimeReporter tr("eval time");
Makefile* mk = cache_mgr->ReadMakefile(g_flags.makefile);
for (Stmt* stmt : mk->stmts()) {
LOG("%s", stmt->DebugString().c_str());
stmt->Eval(ev);
}
}
for (ParseErrorStmt* err : GetParseErrors()) {
WARN("%s:%d: warning for parse error in an unevaluated line: %s",
LOCF(err->loc()), err->msg.c_str());
}
vector<DepNode*> nodes;
{
ScopedTimeReporter tr("make dep time");
MakeDep(ev, ev->rules(), ev->rule_vars(), targets, &nodes);
}
if (g_flags.is_syntax_check_only)
return 0;
if (g_flags.generate_ninja) {
ScopedTimeReporter tr("generate ninja time");
GenerateNinja(nodes, ev, orig_args, start_time);
return 0;
}
for (const auto& p : ev->exports()) {
const Symbol name = p.first;
if (p.second) {
Var* v = ev->LookupVar(name);
const string&& value = v->Eval(ev);
LOG("setenv(%s, %s)", name.c_str(), value.c_str());
setenv(name.c_str(), value.c_str(), 1);
} else {
LOG("unsetenv(%s)", name.c_str());
unsetenv(name.c_str());
}
}
{
ScopedTimeReporter tr("exec time");
Exec(nodes, ev);
}
for (Stmt* stmt : bootstrap_asts)
delete stmt;
delete ev;
delete cache_mgr;
return 0;
}
static void FindFirstMakefie() {
if (g_flags.makefile != NULL)
return;
if (Exists("GNUmakefile")) {
g_flags.makefile = "GNUmakefile";
#if !defined(__APPLE__)
} else if (Exists("makefile")) {
g_flags.makefile = "makefile";
#endif
} else if (Exists("Makefile")) {
g_flags.makefile = "Makefile";
}
}
static void HandleRealpath(int argc, char** argv) {
char buf[PATH_MAX];
for (int i = 0; i < argc; i++) {
if (realpath(argv[i], buf))
printf("%s\n", buf);
}
}
int main(int argc, char* argv[]) {
if (argc >= 2 && !strcmp(argv[1], "--realpath")) {
HandleRealpath(argc - 2, argv + 2);
return 0;
}
Init();
string orig_args;
for (int i = 0; i < argc; i++) {
if (i)
orig_args += ' ';
orig_args += argv[i];
}
g_flags.Parse(argc, argv);
FindFirstMakefie();
if (g_flags.makefile == NULL)
ERROR("*** No targets specified and no makefile found.");
// This depends on command line flags.
if (g_flags.use_find_emulator)
InitFindEmulator();
int r = Run(g_flags.targets, g_flags.cl_vars, orig_args);
Quit();
return r;
}