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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->GetShell());
    188     shell_flags_ = EscapeNinja(ev->GetShellFlag());
    189     const string use_goma_str = ev->EvalVar(Intern("USE_GOMA"));
    190     use_goma_ = !(use_goma_str.empty() || use_goma_str == "false");
    191     if (g_flags.goma_dir)
    192       gomacc_ = StringPrintf("%s/gomacc ", g_flags.goma_dir);
    193 
    194     GetExecutablePath(&kati_binary_);
    195   }
    196 
    197   ~NinjaGenerator() {
    198     ev_->set_avoid_io(false);
    199     for (NinjaNode* nn : nodes_)
    200       delete nn;
    201   }
    202 
    203   void Generate(const vector<DepNode*>& nodes,
    204                 const string& orig_args) {
    205     unlink(GetNinjaStampFilename().c_str());
    206     PopulateNinjaNodes(nodes);
    207     GenerateNinja();
    208     GenerateShell();
    209     GenerateStamp(orig_args);
    210   }
    211 
    212   static string GetStampTempFilename() {
    213     return GetFilename(".kati_stamp%s.tmp");
    214   }
    215 
    216   static string GetFilename(const char* fmt) {
    217     string r = g_flags.ninja_dir ? g_flags.ninja_dir : ".";
    218     r += '/';
    219     r += StringPrintf(fmt, g_flags.ninja_suffix ? g_flags.ninja_suffix : "");
    220     return r;
    221   }
    222 
    223  private:
    224   void PopulateNinjaNodes(const vector<DepNode*>& nodes) {
    225     ScopedTimeReporter tr("ninja gen (eval)");
    226     for (DepNode* node : nodes) {
    227       PopulateNinjaNode(node);
    228     }
    229   }
    230 
    231   void PopulateNinjaNode(DepNode* node) {
    232     auto p = done_.insert(node->output);
    233     if (!p.second)
    234       return;
    235 
    236     // A hack to exclude out phony target in Android. If this exists,
    237     // "ninja -t clean" tries to remove this directory and fails.
    238     if (g_flags.detect_android_echo && node->output.str() == "out")
    239       return;
    240 
    241     // This node is a leaf node
    242     if (!node->has_rule && !node->is_phony) {
    243       return;
    244     }
    245 
    246     NinjaNode* nn = new NinjaNode;
    247     nn->node = node;
    248     ce_.Eval(node, &nn->commands);
    249     nn->rule_id = nn->commands.empty() ? -1 : rule_id_++;
    250     nodes_.push_back(nn);
    251 
    252     for (DepNode* d : node->deps) {
    253       PopulateNinjaNode(d);
    254     }
    255     for (DepNode* d : node->order_onlys) {
    256       PopulateNinjaNode(d);
    257     }
    258   }
    259 
    260   StringPiece TranslateCommand(const char* in, string* cmd_buf) {
    261     const size_t orig_size = cmd_buf->size();
    262     bool prev_backslash = false;
    263     // Set space as an initial value so the leading comment will be
    264     // stripped out.
    265     char prev_char = ' ';
    266     char quote = 0;
    267     for (; *in; in++) {
    268       switch (*in) {
    269         case '#':
    270           if (quote == 0 && isspace(prev_char)) {
    271             while (in[1] && *in != '\n')
    272               in++;
    273           } else {
    274             *cmd_buf += *in;
    275           }
    276           break;
    277 
    278         case '\'':
    279         case '"':
    280         case '`':
    281           if (quote) {
    282             if (quote == *in)
    283               quote = 0;
    284           } else if (!prev_backslash) {
    285             quote = *in;
    286           }
    287           *cmd_buf += *in;
    288           break;
    289 
    290         case '$':
    291           *cmd_buf += "$$";
    292           break;
    293 
    294         case '\n':
    295           if (prev_backslash) {
    296             cmd_buf->resize(cmd_buf->size()-1);
    297           } else {
    298             *cmd_buf += ' ';
    299           }
    300           break;
    301 
    302         case '\\':
    303           *cmd_buf += '\\';
    304           break;
    305 
    306         default:
    307           *cmd_buf += *in;
    308       }
    309 
    310       if (*in == '\\') {
    311         prev_backslash = !prev_backslash;
    312       } else {
    313         prev_backslash = false;
    314       }
    315 
    316       prev_char = *in;
    317     }
    318 
    319     if (prev_backslash) {
    320       cmd_buf->resize(cmd_buf->size()-1);
    321     }
    322 
    323     while (true) {
    324       char c = (*cmd_buf)[cmd_buf->size()-1];
    325       if (!isspace(c) && c != ';')
    326         break;
    327       cmd_buf->resize(cmd_buf->size() - 1);
    328     }
    329 
    330     return StringPiece(cmd_buf->data() + orig_size,
    331                        cmd_buf->size() - orig_size);
    332   }
    333 
    334   bool IsOutputMkdir(const char *name, StringPiece cmd) {
    335     if (!HasPrefix(cmd, "mkdir -p ")) {
    336       return false;
    337     }
    338     cmd = cmd.substr(9, cmd.size());
    339     if (cmd.get(cmd.size() - 1) == '/') {
    340       cmd = cmd.substr(0, cmd.size() - 1);
    341     }
    342 
    343     StringPiece dir = Dirname(name);
    344     if (cmd == dir) {
    345       return true;
    346     }
    347     return false;
    348   }
    349 
    350   bool GetDescriptionFromCommand(StringPiece cmd, string *out) {
    351     if (!HasPrefix(cmd, "echo ")) {
    352       return false;
    353     }
    354     cmd = cmd.substr(5, cmd.size());
    355 
    356     bool prev_backslash = false;
    357     char quote = 0;
    358     string out_buf;
    359 
    360     // Strip outer quotes, and fail if it is not a single echo command
    361     for (StringPiece::iterator in = cmd.begin(); in != cmd.end(); in++) {
    362       if (prev_backslash) {
    363         prev_backslash = false;
    364         out_buf += *in;
    365       } else if (*in == '\\') {
    366         prev_backslash = true;
    367         out_buf += *in;
    368       } else if (quote) {
    369         if (*in == quote) {
    370           quote = 0;
    371         } else {
    372           out_buf += *in;
    373         }
    374       } else {
    375         switch (*in) {
    376         case '\'':
    377         case '"':
    378         case '`':
    379           quote = *in;
    380           break;
    381 
    382         case '<':
    383         case '>':
    384         case '&':
    385         case '|':
    386         case ';':
    387           return false;
    388 
    389         default:
    390           out_buf += *in;
    391         }
    392       }
    393     }
    394 
    395     *out = out_buf;
    396     return true;
    397   }
    398 
    399   bool GenShellScript(const char *name,
    400                       const vector<Command*>& commands,
    401                       string* cmd_buf,
    402                       string* description) {
    403     bool got_descritpion = false;
    404     bool use_gomacc = false;
    405     auto command_count = commands.size();
    406     for (const Command* c : commands) {
    407       size_t cmd_begin = cmd_buf->size();
    408 
    409       if (!cmd_buf->empty()) {
    410         *cmd_buf += " && ";
    411       }
    412 
    413       const char* in = c->cmd.c_str();
    414       while (isspace(*in))
    415         in++;
    416 
    417       bool needs_subshell = (command_count > 1 || c->ignore_error);
    418 
    419       if (needs_subshell)
    420         *cmd_buf += '(';
    421 
    422       size_t cmd_start = cmd_buf->size();
    423       StringPiece translated = TranslateCommand(in, cmd_buf);
    424       if (g_flags.detect_android_echo && !got_descritpion && !c->echo &&
    425           GetDescriptionFromCommand(translated, description)) {
    426         got_descritpion = true;
    427         translated.clear();
    428       } else if (IsOutputMkdir(name, translated) && !c->echo &&
    429                  cmd_begin == 0) {
    430         translated.clear();
    431       }
    432       if (translated.empty()) {
    433         cmd_buf->resize(cmd_begin);
    434         command_count -= 1;
    435         continue;
    436       } else if (g_flags.goma_dir) {
    437         size_t pos = GetGomaccPosForAndroidCompileCommand(translated);
    438         if (pos != string::npos) {
    439           cmd_buf->insert(cmd_start + pos, gomacc_);
    440           use_gomacc = true;
    441         }
    442       } else if (translated.find("/gomacc") != string::npos) {
    443         use_gomacc = true;
    444       }
    445 
    446       if (c->ignore_error) {
    447         *cmd_buf += " ; true";
    448       }
    449 
    450       if (needs_subshell)
    451         *cmd_buf += " )";
    452     }
    453     return (use_goma_ || g_flags.remote_num_jobs ||
    454             g_flags.goma_dir) && !use_gomacc;
    455   }
    456 
    457   bool GetDepfile(const DepNode* node, string* cmd_buf, string* depfile) {
    458     if (node->depfile_var) {
    459       node->depfile_var->Eval(ev_, depfile);
    460       return true;
    461     }
    462     if (!g_flags.detect_depfiles)
    463       return false;
    464 
    465     *cmd_buf += ' ';
    466     bool result = GetDepfileFromCommand(cmd_buf, depfile);
    467     cmd_buf->resize(cmd_buf->size()-1);
    468     return result;
    469   }
    470 
    471   void EmitDepfile(NinjaNode* nn, string* cmd_buf, ostringstream* o) {
    472     const DepNode* node = nn->node;
    473     string depfile;
    474     if (!GetDepfile(node, cmd_buf, &depfile))
    475       return;
    476     *o << " depfile = " << depfile << "\n";
    477     *o << " deps = gcc\n";
    478   }
    479 
    480   void EmitNode(NinjaNode* nn, ostringstream* o) {
    481     const DepNode* node = nn->node;
    482     const vector<Command*>& commands = nn->commands;
    483 
    484     string rule_name = "phony";
    485     bool use_local_pool = false;
    486     if (node->output.get(0) == '.') {
    487       return;
    488     }
    489     if (g_flags.enable_debug) {
    490       *o << "# " << (node->loc.filename ? node->loc.filename : "(null)")
    491          << ':' << node->loc.lineno << "\n";
    492     }
    493     if (!commands.empty()) {
    494       rule_name = StringPrintf("rule%d", nn->rule_id);
    495       *o << "rule " << rule_name << "\n";
    496 
    497       string description = "build $out";
    498       string cmd_buf;
    499       use_local_pool |= GenShellScript(node->output.c_str(), commands,
    500                                        &cmd_buf, &description);
    501       *o << " description = " << description << "\n";
    502       EmitDepfile(nn, &cmd_buf, o);
    503 
    504       // It seems Linux is OK with ~130kB and Mac's limit is ~250kB.
    505       // TODO: Find this number automatically.
    506       if (cmd_buf.size() > 100 * 1000) {
    507         *o << " rspfile = $out.rsp\n";
    508         *o << " rspfile_content = " << cmd_buf << "\n";
    509         *o << " command = " << shell_ << " $out.rsp\n";
    510       } else {
    511         EscapeShell(&cmd_buf);
    512         *o << " command = " << shell_ << ' ' << shell_flags_
    513            << " \"" << cmd_buf << "\"\n";
    514       }
    515       if (node->is_restat) {
    516         *o << " restat = 1\n";
    517       }
    518     }
    519 
    520     EmitBuild(nn, rule_name, use_local_pool, o);
    521   }
    522 
    523   string EscapeNinja(const string& s) const {
    524     if (s.find_first_of("$: ") == string::npos)
    525       return s;
    526     string r;
    527     for (char c : s) {
    528       switch (c) {
    529         case '$':
    530         case ':':
    531         case ' ':
    532           r += '$';
    533           // fall through.
    534         default:
    535           r += c;
    536       }
    537     }
    538     return r;
    539   }
    540 
    541   string EscapeBuildTarget(Symbol s) const {
    542     return EscapeNinja(s.str());
    543   }
    544 
    545   void EmitBuild(NinjaNode* nn, const string& rule_name,
    546                  bool use_local_pool, ostringstream* o) {
    547     const DepNode* node = nn->node;
    548     string target = EscapeBuildTarget(node->output);
    549     *o << "build " << target << ": " << rule_name;
    550     vector<Symbol> order_onlys;
    551     if (node->is_phony) {
    552       *o << " _kati_always_build_";
    553     }
    554     for (DepNode* d : node->deps) {
    555       *o << " " << EscapeBuildTarget(d->output).c_str();
    556     }
    557     if (!node->order_onlys.empty()) {
    558       *o << " ||";
    559       for (DepNode* d : node->order_onlys) {
    560         *o << " " << EscapeBuildTarget(d->output).c_str();
    561       }
    562     }
    563     *o << "\n";
    564     if (node->ninja_pool_var) {
    565       string pool;
    566       node->ninja_pool_var->Eval(ev_, &pool);
    567       *o << " pool = " << pool << "\n";
    568     } else if (use_local_pool) {
    569       *o << " pool = local_pool\n";
    570     }
    571     if (node->is_default_target) {
    572       unique_lock<mutex> lock(mu_);
    573       default_target_ = node;
    574     }
    575   }
    576 
    577   static string GetEnvScriptFilename() {
    578     return GetFilename("env%s.sh");
    579   }
    580 
    581   void GenerateNinja() {
    582     ScopedTimeReporter tr("ninja gen (emit)");
    583     fp_ = fopen(GetNinjaFilename().c_str(), "wb");
    584     if (fp_ == NULL)
    585       PERROR("fopen(build.ninja) failed");
    586 
    587     fprintf(fp_, "# Generated by kati %s\n", kGitVersion);
    588     fprintf(fp_, "\n");
    589 
    590     if (!used_envs_.empty()) {
    591       fprintf(fp_, "# Environment variables used:\n");
    592       for (const auto& p : used_envs_) {
    593         fprintf(fp_, "# %s=%s\n", p.first.c_str(), p.second.c_str());
    594       }
    595       fprintf(fp_, "\n");
    596     }
    597 
    598     if (g_flags.ninja_dir) {
    599       fprintf(fp_, "builddir = %s\n\n", g_flags.ninja_dir);
    600     }
    601 
    602     fprintf(fp_, "pool local_pool\n");
    603     fprintf(fp_, " depth = %d\n\n", g_flags.num_jobs);
    604 
    605     fprintf(fp_, "build _kati_always_build_: phony\n\n");
    606 
    607     unique_ptr<ThreadPool> tp(NewThreadPool(g_flags.num_jobs));
    608     CHECK(g_flags.num_jobs);
    609     int num_nodes_per_task = nodes_.size() / (g_flags.num_jobs * 10) + 1;
    610     int num_tasks = nodes_.size() / num_nodes_per_task + 1;
    611     vector<ostringstream> bufs(num_tasks);
    612     for (int i = 0; i < num_tasks; i++) {
    613       tp->Submit([this, i, num_nodes_per_task, &bufs]() {
    614           int l = min(num_nodes_per_task * (i + 1),
    615                       static_cast<int>(nodes_.size()));
    616           for (int j = num_nodes_per_task * i; j < l; j++) {
    617             EmitNode(nodes_[j], &bufs[i]);
    618           }
    619         });
    620     }
    621     tp->Wait();
    622 
    623     for (const ostringstream& buf : bufs) {
    624       fprintf(fp_, "%s", buf.str().c_str());
    625     }
    626 
    627     unordered_set<Symbol> used_env_vars(Vars::used_env_vars());
    628     // PATH changes $(shell).
    629     used_env_vars.insert(Intern("PATH"));
    630     for (Symbol e : used_env_vars) {
    631       StringPiece val(getenv(e.c_str()));
    632       used_envs_.emplace(e.str(), val.as_string());
    633     }
    634 
    635     string default_targets;
    636     if (g_flags.targets.empty() || g_flags.gen_all_targets) {
    637       CHECK(default_target_);
    638       default_targets = EscapeBuildTarget(default_target_->output);
    639     } else {
    640       for (Symbol s : g_flags.targets) {
    641         if (!default_targets.empty())
    642           default_targets += ' ';
    643         default_targets += EscapeBuildTarget(s);
    644       }
    645     }
    646     fprintf(fp_, "\n");
    647     fprintf(fp_, "default %s\n", default_targets.c_str());
    648 
    649     fclose(fp_);
    650   }
    651 
    652   void GenerateShell() {
    653     FILE* fp = fopen(GetEnvScriptFilename().c_str(), "wb");
    654     if (fp == NULL)
    655       PERROR("fopen(env.sh) failed");
    656 
    657     fprintf(fp, "#!/bin/sh\n");
    658     fprintf(fp, "# Generated by kati %s\n", kGitVersion);
    659     fprintf(fp, "\n");
    660 
    661     for (const auto& p : ev_->exports()) {
    662       if (p.second) {
    663         const string val = ev_->EvalVar(p.first);
    664         fprintf(fp, "export '%s'='%s'\n", p.first.c_str(), val.c_str());
    665       } else {
    666         fprintf(fp, "unset '%s'\n", p.first.c_str());
    667       }
    668     }
    669 
    670     fclose(fp);
    671 
    672     fp = fopen(GetNinjaShellScriptFilename().c_str(), "wb");
    673     if (fp == NULL)
    674       PERROR("fopen(ninja.sh) failed");
    675 
    676     fprintf(fp, "#!/bin/sh\n");
    677     fprintf(fp, "# Generated by kati %s\n", kGitVersion);
    678     fprintf(fp, "\n");
    679 
    680     fprintf(fp, ". %s\n", GetEnvScriptFilename().c_str());
    681 
    682     fprintf(fp, "exec ninja -f %s ", GetNinjaFilename().c_str());
    683     if (g_flags.remote_num_jobs > 0) {
    684       fprintf(fp, "-j%d ", g_flags.remote_num_jobs);
    685     } else if (g_flags.goma_dir) {
    686       fprintf(fp, "-j500 ");
    687     }
    688     fprintf(fp, "\"$@\"\n");
    689 
    690     fclose(fp);
    691 
    692     if (chmod(GetNinjaShellScriptFilename().c_str(), 0755) != 0)
    693       PERROR("chmod ninja.sh failed");
    694   }
    695 
    696   void GenerateStamp(const string& orig_args) {
    697     FILE* fp = fopen(GetStampTempFilename().c_str(), "wb");
    698     CHECK(fp);
    699 
    700     size_t r = fwrite(&start_time_, sizeof(start_time_), 1, fp);
    701     CHECK(r == 1);
    702 
    703     unordered_set<string> makefiles;
    704     MakefileCacheManager::Get()->GetAllFilenames(&makefiles);
    705     DumpInt(fp, makefiles.size() + 1);
    706     DumpString(fp, kati_binary_);
    707     for (const string& makefile : makefiles) {
    708       DumpString(fp, makefile);
    709     }
    710 
    711     DumpInt(fp, Evaluator::used_undefined_vars().size());
    712     for (Symbol v : Evaluator::used_undefined_vars()) {
    713       DumpString(fp, v.str());
    714     }
    715 
    716     DumpInt(fp, used_envs_.size());
    717     for (const auto& p : used_envs_) {
    718       DumpString(fp, p.first);
    719       DumpString(fp, p.second);
    720     }
    721 
    722     const unordered_map<string, vector<string>*>& globs = GetAllGlobCache();
    723     DumpInt(fp, globs.size());
    724     for (const auto& p : globs) {
    725       DumpString(fp, p.first);
    726       const vector<string>& files = *p.second;
    727 #if 0
    728       unordered_set<string> dirs;
    729       GetReadDirs(p.first, files, &dirs);
    730       DumpInt(fp, dirs.size());
    731       for (const string& dir : dirs) {
    732         DumpString(fp, dir);
    733       }
    734 #endif
    735       DumpInt(fp, files.size());
    736       for (const string& file : files) {
    737         DumpString(fp, file);
    738       }
    739     }
    740 
    741     const vector<CommandResult*>& crs = GetShellCommandResults();
    742     DumpInt(fp, crs.size());
    743     for (CommandResult* cr : crs) {
    744       DumpInt(fp, static_cast<int>(cr->op));
    745       DumpString(fp, cr->shell);
    746       DumpString(fp, cr->shellflag);
    747       DumpString(fp, cr->cmd);
    748       DumpString(fp, cr->result);
    749 
    750       if (cr->op == CommandOp::FIND) {
    751         vector<string> missing_dirs;
    752         for (StringPiece fd : cr->find->finddirs) {
    753           const string& d = ConcatDir(cr->find->chdir, fd);
    754           if (!Exists(d))
    755             missing_dirs.push_back(d);
    756         }
    757         DumpInt(fp, missing_dirs.size());
    758         for (const string& d : missing_dirs) {
    759           DumpString(fp, d);
    760         }
    761 
    762         DumpInt(fp, cr->find->found_files->size());
    763         for (StringPiece s : *cr->find->found_files) {
    764           DumpString(fp, ConcatDir(cr->find->chdir, s));
    765         }
    766 
    767         DumpInt(fp, cr->find->read_dirs->size());
    768         for (StringPiece s : *cr->find->read_dirs) {
    769           DumpString(fp, ConcatDir(cr->find->chdir, s));
    770         }
    771       }
    772     }
    773 
    774     DumpString(fp, orig_args);
    775 
    776     fclose(fp);
    777 
    778     rename(GetStampTempFilename().c_str(), GetNinjaStampFilename().c_str());
    779   }
    780 
    781   CommandEvaluator ce_;
    782   Evaluator* ev_;
    783   FILE* fp_;
    784   unordered_set<Symbol> done_;
    785   int rule_id_;
    786   bool use_goma_;
    787   string gomacc_;
    788   string shell_;
    789   string shell_flags_;
    790   map<string, string> used_envs_;
    791   string kati_binary_;
    792   const double start_time_;
    793   vector<NinjaNode*> nodes_;
    794 
    795   mutex mu_;
    796   const DepNode* default_target_;
    797 };
    798 
    799 string GetNinjaFilename() {
    800   return NinjaGenerator::GetFilename("build%s.ninja");
    801 }
    802 
    803 string GetNinjaShellScriptFilename() {
    804   return NinjaGenerator::GetFilename("ninja%s.sh");
    805 }
    806 
    807 string GetNinjaStampFilename() {
    808   return NinjaGenerator::GetFilename(".kati_stamp%s");
    809 }
    810 
    811 void GenerateNinja(const vector<DepNode*>& nodes,
    812                    Evaluator* ev,
    813                    const string& orig_args,
    814                    double start_time) {
    815   NinjaGenerator ng(ev, start_time);
    816   ng.Generate(nodes, orig_args);
    817 }
    818