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      1 // Copyright 2015 Google Inc. All rights reserved
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //      http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 // +build ignore
     16 
     17 #include "ninja.h"
     18 
     19 #include <stdio.h>
     20 #include <stdlib.h>
     21 #include <sys/stat.h>
     22 #include <unistd.h>
     23 
     24 #include <map>
     25 #include <sstream>
     26 #include <string>
     27 #include <unordered_map>
     28 #include <unordered_set>
     29 
     30 #include "command.h"
     31 #include "dep.h"
     32 #include "eval.h"
     33 #include "file_cache.h"
     34 #include "fileutil.h"
     35 #include "find.h"
     36 #include "flags.h"
     37 #include "func.h"
     38 #include "io.h"
     39 #include "log.h"
     40 #include "stats.h"
     41 #include "string_piece.h"
     42 #include "stringprintf.h"
     43 #include "strutil.h"
     44 #include "thread_pool.h"
     45 #include "timeutil.h"
     46 #include "var.h"
     47 #include "version.h"
     48 
     49 static size_t FindCommandLineFlag(StringPiece cmd, StringPiece name) {
     50   const size_t found = cmd.find(name);
     51   if (found == string::npos || found == 0)
     52     return string::npos;
     53   return found;
     54 }
     55 
     56 static StringPiece FindCommandLineFlagWithArg(StringPiece cmd,
     57                                               StringPiece name) {
     58   size_t index = FindCommandLineFlag(cmd, name);
     59   if (index == string::npos)
     60     return StringPiece();
     61 
     62   StringPiece val = TrimLeftSpace(cmd.substr(index + name.size()));
     63   index = val.find(name);
     64   while (index != string::npos) {
     65     val = TrimLeftSpace(val.substr(index + name.size()));
     66     index = val.find(name);
     67   }
     68 
     69   index = val.find_first_of(" \t");
     70   return val.substr(0, index);
     71 }
     72 
     73 static bool StripPrefix(StringPiece p, StringPiece* s) {
     74   if (!HasPrefix(*s, p))
     75     return false;
     76   *s = s->substr(p.size());
     77   return true;
     78 }
     79 
     80 size_t GetGomaccPosForAndroidCompileCommand(StringPiece cmdline) {
     81   size_t index = cmdline.find(' ');
     82   if (index == string::npos)
     83     return string::npos;
     84   StringPiece cmd = cmdline.substr(0, index);
     85   if (HasSuffix(cmd, "ccache")) {
     86     index++;
     87     size_t pos = GetGomaccPosForAndroidCompileCommand(cmdline.substr(index));
     88     return pos == string::npos ? string::npos : pos + index;
     89   }
     90   if (!StripPrefix("prebuilts/", &cmd))
     91     return string::npos;
     92   if (!StripPrefix("gcc/", &cmd) && !StripPrefix("clang/", &cmd))
     93     return string::npos;
     94   if (!HasSuffix(cmd, "gcc") && !HasSuffix(cmd, "g++") &&
     95       !HasSuffix(cmd, "clang") && !HasSuffix(cmd, "clang++")) {
     96     return string::npos;
     97   }
     98 
     99   StringPiece rest = cmdline.substr(index);
    100   return rest.find(" -c ") != string::npos ? 0 : string::npos;
    101 }
    102 
    103 static bool GetDepfileFromCommandImpl(StringPiece cmd, string* out) {
    104   if ((FindCommandLineFlag(cmd, " -MD") == string::npos &&
    105        FindCommandLineFlag(cmd, " -MMD") == string::npos) ||
    106       FindCommandLineFlag(cmd, " -c") == string::npos) {
    107     return false;
    108   }
    109 
    110   StringPiece mf = FindCommandLineFlagWithArg(cmd, " -MF");
    111   if (!mf.empty()) {
    112     mf.AppendToString(out);
    113     return true;
    114   }
    115 
    116   StringPiece o = FindCommandLineFlagWithArg(cmd, " -o");
    117   if (o.empty()) {
    118     ERROR("Cannot find the depfile in %s", cmd.as_string().c_str());
    119     return false;
    120   }
    121 
    122   StripExt(o).AppendToString(out);
    123   *out += ".d";
    124   return true;
    125 }
    126 
    127 bool GetDepfileFromCommand(string* cmd, string* out) {
    128   CHECK(!cmd->empty());
    129   if (!GetDepfileFromCommandImpl(*cmd, out))
    130     return false;
    131 
    132   // A hack for Android - llvm-rs-cc seems not to emit a dep file.
    133   if (cmd->find("bin/llvm-rs-cc ") != string::npos) {
    134     return false;
    135   }
    136 
    137   // TODO: A hack for Makefiles generated by automake.
    138 
    139   // A hack for Android to get .P files instead of .d.
    140   string p;
    141   StripExt(*out).AppendToString(&p);
    142   p += ".P";
    143   if (cmd->find(p) != string::npos) {
    144     const string rm_f = "; rm -f " + *out;
    145     const size_t found = cmd->find(rm_f);
    146     if (found == string::npos) {
    147       ERROR("Cannot find removal of .d file: %s", cmd->c_str());
    148     }
    149     cmd->erase(found, rm_f.size());
    150     return true;
    151   }
    152 
    153   // A hack for Android. For .s files, GCC does not use C
    154   // preprocessor, so it ignores -MF flag.
    155   string as = "/";
    156   StripExt(Basename(*out)).AppendToString(&as);
    157   as += ".s";
    158   if (cmd->find(as) != string::npos) {
    159     return false;
    160   }
    161 
    162   *cmd += "&& cp ";
    163   *cmd += *out;
    164   *cmd += ' ';
    165   *cmd += *out;
    166   *cmd += ".tmp ";
    167   *out += ".tmp";
    168   return true;
    169 }
    170 
    171 struct NinjaNode {
    172   const DepNode* node;
    173   vector<Command*> commands;
    174   int rule_id;
    175 };
    176 
    177 class NinjaGenerator {
    178  public:
    179   NinjaGenerator(Evaluator* ev, double start_time)
    180       : ce_(ev),
    181         ev_(ev),
    182         fp_(NULL),
    183         rule_id_(0),
    184         start_time_(start_time),
    185         default_target_(NULL) {
    186     ev_->set_avoid_io(true);
    187     shell_ = EscapeNinja(ev->EvalVar(kShellSym));
    188     if (g_flags.goma_dir)
    189       gomacc_ = StringPrintf("%s/gomacc ", g_flags.goma_dir);
    190 
    191     GetExecutablePath(&kati_binary_);
    192   }
    193 
    194   ~NinjaGenerator() {
    195     ev_->set_avoid_io(false);
    196     for (NinjaNode* nn : nodes_)
    197       delete nn;
    198   }
    199 
    200   void Generate(const vector<DepNode*>& nodes,
    201                 const string& orig_args) {
    202     unlink(GetNinjaStampFilename().c_str());
    203     PopulateNinjaNodes(nodes);
    204     GenerateNinja();
    205     GenerateShell();
    206     GenerateStamp(orig_args);
    207   }
    208 
    209   static string GetStampTempFilename() {
    210     return GetFilename(".kati_stamp%s.tmp");
    211   }
    212 
    213   static string GetFilename(const char* fmt) {
    214     string r = g_flags.ninja_dir ? g_flags.ninja_dir : ".";
    215     r += '/';
    216     r += StringPrintf(fmt, g_flags.ninja_suffix ? g_flags.ninja_suffix : "");
    217     return r;
    218   }
    219 
    220  private:
    221   void PopulateNinjaNodes(const vector<DepNode*>& nodes) {
    222     ScopedTimeReporter tr("ninja gen (eval)");
    223     for (DepNode* node : nodes) {
    224       PopulateNinjaNode(node);
    225     }
    226   }
    227 
    228   void PopulateNinjaNode(DepNode* node) {
    229     auto p = done_.insert(node->output);
    230     if (!p.second)
    231       return;
    232 
    233     // A hack to exclude out phony target in Android. If this exists,
    234     // "ninja -t clean" tries to remove this directory and fails.
    235     if (g_flags.detect_android_echo && node->output.str() == "out")
    236       return;
    237 
    238     // This node is a leaf node
    239     if (!node->has_rule && !node->is_phony) {
    240       return;
    241     }
    242 
    243     NinjaNode* nn = new NinjaNode;
    244     nn->node = node;
    245     ce_.Eval(node, &nn->commands);
    246     nn->rule_id = nn->commands.empty() ? -1 : rule_id_++;
    247     nodes_.push_back(nn);
    248 
    249     for (DepNode* d : node->deps) {
    250       PopulateNinjaNode(d);
    251     }
    252     for (DepNode* d : node->order_onlys) {
    253       PopulateNinjaNode(d);
    254     }
    255   }
    256 
    257   StringPiece TranslateCommand(const char* in, string* cmd_buf) {
    258     const size_t orig_size = cmd_buf->size();
    259     bool prev_backslash = false;
    260     // Set space as an initial value so the leading comment will be
    261     // stripped out.
    262     char prev_char = ' ';
    263     char quote = 0;
    264     for (; *in; in++) {
    265       switch (*in) {
    266         case '#':
    267           if (quote == 0 && isspace(prev_char)) {
    268             while (in[1] && *in != '\n')
    269               in++;
    270           } else {
    271             *cmd_buf += *in;
    272           }
    273           break;
    274 
    275         case '\'':
    276         case '"':
    277         case '`':
    278           if (quote) {
    279             if (quote == *in)
    280               quote = 0;
    281           } else if (!prev_backslash) {
    282             quote = *in;
    283           }
    284           *cmd_buf += *in;
    285           break;
    286 
    287         case '$':
    288           *cmd_buf += "$$";
    289           break;
    290 
    291         case '\n':
    292           if (prev_backslash) {
    293             cmd_buf->resize(cmd_buf->size()-1);
    294           } else {
    295             *cmd_buf += ' ';
    296           }
    297           break;
    298 
    299         case '\\':
    300           *cmd_buf += '\\';
    301           break;
    302 
    303         default:
    304           *cmd_buf += *in;
    305       }
    306 
    307       if (*in == '\\') {
    308         prev_backslash = !prev_backslash;
    309       } else {
    310         prev_backslash = false;
    311       }
    312 
    313       prev_char = *in;
    314     }
    315 
    316     if (prev_backslash) {
    317       cmd_buf->resize(cmd_buf->size()-1);
    318     }
    319 
    320     while (true) {
    321       char c = (*cmd_buf)[cmd_buf->size()-1];
    322       if (!isspace(c) && c != ';')
    323         break;
    324       cmd_buf->resize(cmd_buf->size() - 1);
    325     }
    326 
    327     return StringPiece(cmd_buf->data() + orig_size,
    328                        cmd_buf->size() - orig_size);
    329   }
    330 
    331   bool IsOutputMkdir(const char *name, StringPiece cmd) {
    332     if (!HasPrefix(cmd, "mkdir -p ")) {
    333       return false;
    334     }
    335     cmd = cmd.substr(9, cmd.size());
    336     if (cmd.get(cmd.size() - 1) == '/') {
    337       cmd = cmd.substr(0, cmd.size() - 1);
    338     }
    339 
    340     StringPiece dir = Dirname(name);
    341     if (cmd == dir) {
    342       return true;
    343     }
    344     return false;
    345   }
    346 
    347   bool GetDescriptionFromCommand(StringPiece cmd, string *out) {
    348     if (!HasPrefix(cmd, "echo ")) {
    349       return false;
    350     }
    351     cmd = cmd.substr(5, cmd.size());
    352 
    353     bool prev_backslash = false;
    354     char quote = 0;
    355     string out_buf;
    356 
    357     // Strip outer quotes, and fail if it is not a single echo command
    358     for (StringPiece::iterator in = cmd.begin(); in != cmd.end(); in++) {
    359       if (prev_backslash) {
    360         prev_backslash = false;
    361         out_buf += *in;
    362       } else if (*in == '\\') {
    363         prev_backslash = true;
    364         out_buf += *in;
    365       } else if (quote) {
    366         if (*in == quote) {
    367           quote = 0;
    368         } else {
    369           out_buf += *in;
    370         }
    371       } else {
    372         switch (*in) {
    373         case '\'':
    374         case '"':
    375         case '`':
    376           quote = *in;
    377           break;
    378 
    379         case '<':
    380         case '>':
    381         case '&':
    382         case '|':
    383         case ';':
    384           return false;
    385 
    386         default:
    387           out_buf += *in;
    388         }
    389       }
    390     }
    391 
    392     *out = out_buf;
    393     return true;
    394   }
    395 
    396   bool GenShellScript(const char *name,
    397                       const vector<Command*>& commands,
    398                       string* cmd_buf,
    399                       string* description) {
    400     // TODO: This is a dirty hack to set local_pool even without
    401     // --goma_dir or --remote_num_jobs which are not used in AOSP
    402     // anymore. This won't set local_pool for targets which appear
    403     // before the first command which uses gomacc. Fortunately, such
    404     // command appears soon so almost all build targets have
    405     // local_pool appropriately, but it's definitely better to come up
    406     // with a more reliable solution.
    407     static bool was_gomacc_found = false;
    408     bool got_descritpion = false;
    409     bool use_gomacc = false;
    410     auto command_count = commands.size();
    411     for (const Command* c : commands) {
    412       size_t cmd_begin = cmd_buf->size();
    413 
    414       if (!cmd_buf->empty()) {
    415         *cmd_buf += " && ";
    416       }
    417 
    418       const char* in = c->cmd.c_str();
    419       while (isspace(*in))
    420         in++;
    421 
    422       bool needs_subshell = (command_count > 1 || c->ignore_error);
    423 
    424       if (needs_subshell)
    425         *cmd_buf += '(';
    426 
    427       size_t cmd_start = cmd_buf->size();
    428       StringPiece translated = TranslateCommand(in, cmd_buf);
    429       if (g_flags.detect_android_echo && !got_descritpion && !c->echo &&
    430           GetDescriptionFromCommand(translated, description)) {
    431         got_descritpion = true;
    432         translated.clear();
    433       } else if (IsOutputMkdir(name, translated) && !c->echo &&
    434                  cmd_begin == 0) {
    435         translated.clear();
    436       }
    437       if (translated.empty()) {
    438         cmd_buf->resize(cmd_begin);
    439         command_count -= 1;
    440         continue;
    441       } else if (g_flags.goma_dir) {
    442         size_t pos = GetGomaccPosForAndroidCompileCommand(translated);
    443         if (pos != string::npos) {
    444           cmd_buf->insert(cmd_start + pos, gomacc_);
    445           use_gomacc = true;
    446         }
    447       } else if (translated.find("/gomacc") != string::npos) {
    448         use_gomacc = true;
    449         was_gomacc_found = true;
    450       }
    451 
    452       if (c->ignore_error) {
    453         *cmd_buf += " ; true";
    454       }
    455 
    456       if (needs_subshell)
    457         *cmd_buf += " )";
    458     }
    459     return (was_gomacc_found || g_flags.remote_num_jobs ||
    460             g_flags.goma_dir) && !use_gomacc;
    461   }
    462 
    463   bool GetDepfile(const DepNode* node, string* cmd_buf, string* depfile) {
    464     if (node->depfile_var) {
    465       node->depfile_var->Eval(ev_, depfile);
    466       return true;
    467     }
    468     if (!g_flags.detect_depfiles)
    469       return false;
    470 
    471     *cmd_buf += ' ';
    472     bool result = GetDepfileFromCommand(cmd_buf, depfile);
    473     cmd_buf->resize(cmd_buf->size()-1);
    474     return result;
    475   }
    476 
    477   void EmitDepfile(NinjaNode* nn, string* cmd_buf, ostringstream* o) {
    478     const DepNode* node = nn->node;
    479     string depfile;
    480     if (!GetDepfile(node, cmd_buf, &depfile))
    481       return;
    482     *o << " depfile = " << depfile << "\n";
    483     *o << " deps = gcc\n";
    484   }
    485 
    486   void EmitNode(NinjaNode* nn, ostringstream* o) {
    487     const DepNode* node = nn->node;
    488     const vector<Command*>& commands = nn->commands;
    489 
    490     string rule_name = "phony";
    491     bool use_local_pool = false;
    492     if (!commands.empty()) {
    493       rule_name = StringPrintf("rule%d", nn->rule_id);
    494       *o << "rule " << rule_name << "\n";
    495 
    496       string description = "build $out";
    497       string cmd_buf;
    498       use_local_pool |= GenShellScript(node->output.c_str(), commands,
    499                                        &cmd_buf, &description);
    500       *o << " description = " << description << "\n";
    501       EmitDepfile(nn, &cmd_buf, o);
    502 
    503       // It seems Linux is OK with ~130kB and Mac's limit is ~250kB.
    504       // TODO: Find this number automatically.
    505       if (cmd_buf.size() > 100 * 1000) {
    506         *o << " rspfile = $out.rsp\n";
    507         *o << " rspfile_content = " << cmd_buf << "\n";
    508         *o << " command = " << shell_ << " $out.rsp\n";
    509       } else {
    510         EscapeShell(&cmd_buf);
    511         *o << " command = " << shell_ << " -c \"" << cmd_buf << "\"\n";
    512       }
    513       if (node->is_restat) {
    514         *o << " restat = 1\n";
    515       }
    516     }
    517 
    518     EmitBuild(nn, rule_name, use_local_pool, o);
    519   }
    520 
    521   string EscapeNinja(const string& s) const {
    522     if (s.find_first_of("$: ") == string::npos)
    523       return s;
    524     string r;
    525     for (char c : s) {
    526       switch (c) {
    527         case '$':
    528         case ':':
    529         case ' ':
    530           r += '$';
    531           // fall through.
    532         default:
    533           r += c;
    534       }
    535     }
    536     return r;
    537   }
    538 
    539   string EscapeBuildTarget(Symbol s) const {
    540     return EscapeNinja(s.str());
    541   }
    542 
    543   void EmitBuild(NinjaNode* nn, const string& rule_name,
    544                  bool use_local_pool, ostringstream* o) {
    545     const DepNode* node = nn->node;
    546     string target = EscapeBuildTarget(node->output);
    547     *o << "build " << target << ": " << rule_name;
    548     vector<Symbol> order_onlys;
    549     if (node->is_phony) {
    550       *o << " _kati_always_build_";
    551     }
    552     for (DepNode* d : node->deps) {
    553       *o << " " << EscapeBuildTarget(d->output).c_str();
    554     }
    555     if (!node->order_onlys.empty()) {
    556       *o << " ||";
    557       for (DepNode* d : node->order_onlys) {
    558         *o << " " << EscapeBuildTarget(d->output).c_str();
    559       }
    560     }
    561     *o << "\n";
    562     if (use_local_pool)
    563       *o << " pool = local_pool\n";
    564     if (node->is_default_target) {
    565       unique_lock<mutex> lock(mu_);
    566       default_target_ = node;
    567     }
    568   }
    569 
    570   static string GetEnvScriptFilename() {
    571     return GetFilename("env%s.sh");
    572   }
    573 
    574   void GenerateNinja() {
    575     ScopedTimeReporter tr("ninja gen (emit)");
    576     fp_ = fopen(GetNinjaFilename().c_str(), "wb");
    577     if (fp_ == NULL)
    578       PERROR("fopen(build.ninja) failed");
    579 
    580     fprintf(fp_, "# Generated by kati %s\n", kGitVersion);
    581     fprintf(fp_, "\n");
    582 
    583     if (!used_envs_.empty()) {
    584       fprintf(fp_, "# Environment variables used:\n");
    585       for (const auto& p : used_envs_) {
    586         fprintf(fp_, "# %s=%s\n", p.first.c_str(), p.second.c_str());
    587       }
    588       fprintf(fp_, "\n");
    589     }
    590 
    591     if (g_flags.ninja_dir) {
    592       fprintf(fp_, "builddir = %s\n\n", g_flags.ninja_dir);
    593     }
    594 
    595     fprintf(fp_, "pool local_pool\n");
    596     fprintf(fp_, " depth = %d\n\n", g_flags.num_jobs);
    597 
    598     fprintf(fp_, "build _kati_always_build_: phony\n\n");
    599 
    600     unique_ptr<ThreadPool> tp(NewThreadPool(g_flags.num_jobs));
    601     CHECK(g_flags.num_jobs);
    602     int num_nodes_per_task = nodes_.size() / (g_flags.num_jobs * 10) + 1;
    603     int num_tasks = nodes_.size() / num_nodes_per_task + 1;
    604     vector<ostringstream> bufs(num_tasks);
    605     for (int i = 0; i < num_tasks; i++) {
    606       tp->Submit([this, i, num_nodes_per_task, &bufs]() {
    607           int l = min(num_nodes_per_task * (i + 1),
    608                       static_cast<int>(nodes_.size()));
    609           for (int j = num_nodes_per_task * i; j < l; j++) {
    610             EmitNode(nodes_[j], &bufs[i]);
    611           }
    612         });
    613     }
    614     tp->Wait();
    615 
    616     for (const ostringstream& buf : bufs) {
    617       fprintf(fp_, "%s", buf.str().c_str());
    618     }
    619 
    620     unordered_set<Symbol> used_env_vars(Vars::used_env_vars());
    621     // PATH changes $(shell).
    622     used_env_vars.insert(Intern("PATH"));
    623     for (Symbol e : used_env_vars) {
    624       StringPiece val(getenv(e.c_str()));
    625       used_envs_.emplace(e.str(), val.as_string());
    626     }
    627 
    628     string default_targets;
    629     if (g_flags.targets.empty() || g_flags.gen_all_targets) {
    630       CHECK(default_target_);
    631       default_targets = EscapeBuildTarget(default_target_->output);
    632     } else {
    633       for (Symbol s : g_flags.targets) {
    634         if (!default_targets.empty())
    635           default_targets += ' ';
    636         default_targets += EscapeBuildTarget(s);
    637       }
    638     }
    639     fprintf(fp_, "\n");
    640     fprintf(fp_, "default %s\n", default_targets.c_str());
    641 
    642     fclose(fp_);
    643   }
    644 
    645   void GenerateShell() {
    646     FILE* fp = fopen(GetEnvScriptFilename().c_str(), "wb");
    647     if (fp == NULL)
    648       PERROR("fopen(env.sh) failed");
    649 
    650     fprintf(fp, "#!/bin/sh\n");
    651     fprintf(fp, "# Generated by kati %s\n", kGitVersion);
    652     fprintf(fp, "\n");
    653 
    654     for (const auto& p : ev_->exports()) {
    655       if (p.second) {
    656         const string val = ev_->EvalVar(p.first);
    657         fprintf(fp, "export '%s'='%s'\n", p.first.c_str(), val.c_str());
    658       } else {
    659         fprintf(fp, "unset '%s'\n", p.first.c_str());
    660       }
    661     }
    662 
    663     fclose(fp);
    664 
    665     fp = fopen(GetNinjaShellScriptFilename().c_str(), "wb");
    666     if (fp == NULL)
    667       PERROR("fopen(ninja.sh) failed");
    668 
    669     fprintf(fp, "#!/bin/sh\n");
    670     fprintf(fp, "# Generated by kati %s\n", kGitVersion);
    671     fprintf(fp, "\n");
    672 
    673     fprintf(fp, ". %s\n", GetEnvScriptFilename().c_str());
    674 
    675     fprintf(fp, "exec ninja -f %s ", GetNinjaFilename().c_str());
    676     if (g_flags.remote_num_jobs > 0) {
    677       fprintf(fp, "-j%d ", g_flags.remote_num_jobs);
    678     } else if (g_flags.goma_dir) {
    679       fprintf(fp, "-j500 ");
    680     }
    681     fprintf(fp, "\"$@\"\n");
    682 
    683     fclose(fp);
    684 
    685     if (chmod(GetNinjaShellScriptFilename().c_str(), 0755) != 0)
    686       PERROR("chmod ninja.sh failed");
    687   }
    688 
    689   void GenerateStamp(const string& orig_args) {
    690     FILE* fp = fopen(GetStampTempFilename().c_str(), "wb");
    691     CHECK(fp);
    692 
    693     size_t r = fwrite(&start_time_, sizeof(start_time_), 1, fp);
    694     CHECK(r == 1);
    695 
    696     unordered_set<string> makefiles;
    697     MakefileCacheManager::Get()->GetAllFilenames(&makefiles);
    698     DumpInt(fp, makefiles.size() + 1);
    699     DumpString(fp, kati_binary_);
    700     for (const string& makefile : makefiles) {
    701       DumpString(fp, makefile);
    702     }
    703 
    704     DumpInt(fp, Evaluator::used_undefined_vars().size());
    705     for (Symbol v : Evaluator::used_undefined_vars()) {
    706       DumpString(fp, v.str());
    707     }
    708 
    709     DumpInt(fp, used_envs_.size());
    710     for (const auto& p : used_envs_) {
    711       DumpString(fp, p.first);
    712       DumpString(fp, p.second);
    713     }
    714 
    715     const unordered_map<string, vector<string>*>& globs = GetAllGlobCache();
    716     DumpInt(fp, globs.size());
    717     for (const auto& p : globs) {
    718       DumpString(fp, p.first);
    719       const vector<string>& files = *p.second;
    720 #if 0
    721       unordered_set<string> dirs;
    722       GetReadDirs(p.first, files, &dirs);
    723       DumpInt(fp, dirs.size());
    724       for (const string& dir : dirs) {
    725         DumpString(fp, dir);
    726       }
    727 #endif
    728       DumpInt(fp, files.size());
    729       for (const string& file : files) {
    730         DumpString(fp, file);
    731       }
    732     }
    733 
    734     const vector<CommandResult*>& crs = GetShellCommandResults();
    735     DumpInt(fp, crs.size());
    736     for (CommandResult* cr : crs) {
    737       DumpString(fp, cr->cmd);
    738       DumpString(fp, cr->result);
    739       if (!cr->find.get()) {
    740         // Always re-run this command.
    741         DumpInt(fp, 0);
    742         continue;
    743       }
    744 
    745       DumpInt(fp, 1);
    746 
    747       vector<string> missing_dirs;
    748       for (StringPiece fd : cr->find->finddirs) {
    749         const string& d = ConcatDir(cr->find->chdir, fd);
    750         if (!Exists(d))
    751           missing_dirs.push_back(d);
    752       }
    753       DumpInt(fp, missing_dirs.size());
    754       for (const string& d : missing_dirs) {
    755         DumpString(fp, d);
    756       }
    757 
    758       DumpInt(fp, cr->find->read_dirs->size());
    759       for (StringPiece s : *cr->find->read_dirs) {
    760         DumpString(fp, ConcatDir(cr->find->chdir, s));
    761       }
    762     }
    763 
    764     DumpString(fp, orig_args);
    765 
    766     fclose(fp);
    767 
    768     rename(GetStampTempFilename().c_str(), GetNinjaStampFilename().c_str());
    769   }
    770 
    771   CommandEvaluator ce_;
    772   Evaluator* ev_;
    773   FILE* fp_;
    774   unordered_set<Symbol> done_;
    775   int rule_id_;
    776   string gomacc_;
    777   string shell_;
    778   map<string, string> used_envs_;
    779   string kati_binary_;
    780   const double start_time_;
    781   vector<NinjaNode*> nodes_;
    782 
    783   mutex mu_;
    784   const DepNode* default_target_;
    785 };
    786 
    787 string GetNinjaFilename() {
    788   return NinjaGenerator::GetFilename("build%s.ninja");
    789 }
    790 
    791 string GetNinjaShellScriptFilename() {
    792   return NinjaGenerator::GetFilename("ninja%s.sh");
    793 }
    794 
    795 string GetNinjaStampFilename() {
    796   return NinjaGenerator::GetFilename(".kati_stamp%s");
    797 }
    798 
    799 void GenerateNinja(const vector<DepNode*>& nodes,
    800                    Evaluator* ev,
    801                    const string& orig_args,
    802                    double start_time) {
    803   NinjaGenerator ng(ev, start_time);
    804   ng.Generate(nodes, orig_args);
    805 }
    806