hphp/util/build-info.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/util/build-info.h"
  18
  19 #include "hphp/util/embedded-data.h"
  20
  21 #include <folly/Range.h>
  22 #include <atomic>
  23 #include <mutex>
  24 #include <string>
  25
  26 namespace HPHP {
  27 ////////////////////////////////////////////////////////////////////////////////
  28
  29 namespace {
  30
  31 std::atomic<bool> inited;
  32 std::mutex mtx;
  33 std::string repoSchema;
  34 std::string compiler;
  35 std::string buildid;
  36 std::string hhjsbabeltransform;
  37
  38 ////////////////////////////////////////////////////////////////////////////////
  39
  40 /*
  41  * Initializes the repo schema id and the compiler id from their special
  42  * sections in the hhvm binary.
  43  */
  44 void readBuildInfo() {
  45   if (inited.load(std::memory_order_acquire)) return;
  46   std::unique_lock<std::mutex> lock(mtx);
  47   if (inited.load(std::memory_order_acquire)) return;
  48
  49   auto const get = [&] (const char* section) -> std::string {
  50     auto constexpr bad = "(UNKNOWN)";
  51
  52     embedded_data desc;
  53     if (!get_embedded_data(section, &desc)) {
  54       return bad;
  55     }
  56
  57     auto const data = read_embedded_data(desc);
  58     if (data.empty()) {
  59       return bad;
  60     }
  61
  62     return data;
  63   };
  64
  65   if (auto const env_schema = getenv("HHVM_RUNTIME_REPO_SCHEMA")) {
  66     repoSchema = env_schema;
  67   } else {
  68     repoSchema = get("repo_schema_id");
  69   }
  70
  71   compiler = get("compiler_id");
  72   buildid = get("build_id");
  73   hhjsbabeltransform = get("hhjs_babel_transform");
  74
  75   inited.store(true, std::memory_order_release);
  76 }
  77
  78 }
  79
  80 ////////////////////////////////////////////////////////////////////////////////
  81
  82 folly::StringPiece repoSchemaId() {
  83   readBuildInfo();
  84   return repoSchema;
  85 }
  86
  87 folly::StringPiece compilerId() {
  88   readBuildInfo();
  89   return compiler;
  90 }
  91
  92 folly::StringPiece buildId() {
  93   readBuildInfo();
  94   return buildid;
  95 }
  96
  97 folly::StringPiece hhjsBabelTransform() {
  98   readBuildInfo();
  99   return hhjsbabeltransform;
 100 }
 101
 102 const char* kSchemaPlaceholder = "%{schema}";
 103
 104 std::string insertSchema(const char* path) {
 105   assert(strstr(repoSchemaId().begin(), kSchemaPlaceholder) == nullptr);
 106   std::string result = path;
 107   size_t idx;
 108   if ((idx = result.find(kSchemaPlaceholder)) != std::string::npos) {
 109     result.replace(idx, strlen(kSchemaPlaceholder), repoSchemaId().begin());
 110   }
 111   return result;
 112 }
 113
 114 ////////////////////////////////////////////////////////////////////////////////
 115 }