1 | (function() {
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2 | var bindExit, findDeep, fs, isRunning, lock, lockfile, path, unbindExit;
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3 |
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4 | lockfile = require('lockfile');
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5 |
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6 | fs = require('fs');
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7 |
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8 | path = require('path');
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9 |
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10 | isRunning = function(pid) {
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11 | var e;
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12 | try {
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13 | process.kill(pid, 0);
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14 | } catch (error) {
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15 | e = error;
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16 | return false;
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17 | }
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18 | return true;
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19 | };
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20 |
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21 | exports.lock = lock = function(name, status, configPath, configData, cb) {
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22 | var lockPath, pidPath, verification;
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23 | lockPath = path.join(path.dirname(configPath), name + ".lock");
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24 | pidPath = path.join(path.dirname(configPath), name + ".pid");
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25 | verification = {
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26 | lockPath: lockPath,
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27 | pidPath: pidPath
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28 | };
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29 | return lockfile.lock(lockPath, {}, function(err) {
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30 | var fail;
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31 | if (err != null) {
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32 | fail = function() {
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33 | console.error("File " + lockPath + " already exists: is another instance running?", err);
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34 | return process.exit(1);
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35 | };
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36 | return fs.exists(pidPath, function(exists) {
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37 | if (exists) {
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38 | return fs.readFile(pidPath, {
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39 | encoding: 'utf8'
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40 | }, function(err, data) {
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41 | var pidobj;
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42 | if (err != null) {
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43 | return cb(err);
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44 | }
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45 | pidobj = JSON.parse(data);
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46 | if (!isRunning(pidobj.pid)) {
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47 | fs.unlinkSync(pidPath);
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48 | fs.unlinkSync(lockPath);
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49 | return lock(name, status, configPath, configData, cb);
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50 | } else {
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51 | return fail();
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52 | }
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53 | });
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54 | } else {
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55 | return fail();
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56 | }
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57 | });
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58 | } else {
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59 | return fs.writeFile(pidPath, JSON.stringify(status), {
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60 | encoding: 'utf8'
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61 | }, function(err) {
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62 | if (err) {
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63 | console.error("Could not write status file " + pidPath, err);
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64 | return process.exit(1);
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65 | } else {
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66 | verification.group = bindExit(function() {
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67 | fs.unlinkSync(pidPath);
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68 | return lockfile.unlockSync(lockPath);
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69 | });
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70 | return cb(null, verification);
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71 | }
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72 | });
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73 | }
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74 | });
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75 | };
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76 |
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77 | exports.unlock = function(verification) {
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78 | fs.unlinkSync(verification.pidPath);
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79 | lockfile.unlockSync(verification.lockPath);
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80 | return unbindExit(verification.group);
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81 | };
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82 |
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83 | exports.find = function(name, configPath, cb) {
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84 | return findDeep(name, configPath, false, cb);
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85 | };
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86 |
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87 | exports.findDeep = findDeep = function(name, configPath, erase, cb) {
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88 | var lockPath, pidPath;
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89 | lockPath = path.join(path.dirname(configPath), name + ".lock");
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90 | pidPath = path.join(path.dirname(configPath), name + ".pid");
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91 | return fs.exists(lockPath, function(exists) {
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92 | if (!exists) {
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93 | return cb(null, false);
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94 | }
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95 | return fs.exists(pidPath, function(exists) {
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96 | if (!exists) {
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97 | return cb(null, false);
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98 | }
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99 | return fs.readFile(pidPath, {
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100 | encoding: 'utf8'
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101 | }, function(err, data) {
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102 | var pidobj;
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103 | if (err != null) {
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104 | return cb(err);
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105 | }
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106 | pidobj = JSON.parse(data);
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107 | if (!erase) {
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108 | return cb(null, true, pidobj);
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109 | }
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110 | if (isRunning(pidobj.pid)) {
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111 | return cb(null, true, pidobj);
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112 | } else {
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113 | fs.unlinkSync(pidPath);
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114 | fs.unlinkSync(lockPath);
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115 | return cb(null, false);
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116 | }
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117 | });
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118 | });
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119 | });
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120 | };
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121 |
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122 | bindExit = function(fn) {
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123 | var group, handled;
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124 | handled = false;
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125 | group = {
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126 | fn: fn,
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127 | exit: function() {
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128 | if (!handled) {
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129 | fn();
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130 | }
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131 | return handled = true;
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132 | },
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133 | sigint: function() {
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134 | if (!handled) {
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135 | fn();
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136 | }
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137 | handled = true;
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138 | return process.exit(130);
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139 | },
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140 | sigterm: function() {
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141 | if (!handled) {
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142 | fn();
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143 | }
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144 | handled = true;
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145 | return process.exit(131);
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146 | }
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147 | };
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148 | process.on('exit', group.exit);
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149 | process.on('SIGINT', group.sigint);
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150 | process.on('SIGTERM', group.sigterm);
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151 | return group;
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152 | };
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153 |
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154 | unbindExit = function(group) {
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155 | process.removeListener('exit', group.exit);
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156 | process.removeListener('SIGINT', group.sigint);
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157 | process.removeListener('SIGTERM', group.sigterm);
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158 | return group;
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159 | };
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160 |
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161 | }).call(this);
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