mecano/lib/link.js

Common functions for system deployment.

// Generated by CoffeeScript 1.7.1
var child, conditions, each, fs, misc, mkdir, path;

fs = require('ssh2-fs');

path = require('path');

each = require('each');

misc = require('./misc');

conditions = require('./misc/conditions');

child = require('./misc/child');

mkdir = require('./mkdir');

module.exports = function(goptions, options, callback) {
  var finish, result, _ref;
  _ref = misc.args(arguments), goptions = _ref[0], options = _ref[1], callback = _ref[2];
  result = child();
  finish = function(err, created) {
    if (callback) {
      callback(err, created);
    }
    return result.end(err, created);
  };
  misc.options(options, function(err, options) {
    var exec_create, exec_exists, linked, sym_create, sym_exists;
    if (err) {
      return finish(err);
    }
    linked = 0;
    sym_exists = function(options, callback) {
      return fs.exists(options.ssh, options.destination, function(err, exists) {
        if (!exists) {
          return callback(null, false);
        }
        return fs.readlink(options.ssh, options.destination, function(err, resolvedPath) {
          if (err) {
            return callback(err);
          }
          if (resolvedPath === options.source) {
            return callback(null, true);
          }
          return fs.unlink(options.ssh, options.destination, function(err) {
            if (err) {
              return callback(err);
            }
            return callback(null, false);
          });
        });
      });
    };
    sym_create = function(options, callback) {
      return fs.symlink(options.ssh, options.source, options.destination, function(err) {
        if (err) {
          return callback(err);
        }
        linked++;
        return callback();
      });
    };
    exec_exists = function(options, callback) {
      return fs.exists(options.ssh, options.destination, function(err, exists) {
        if (!exists) {
          return callback(null, false);
        }
        return fs.readFile(options.ssh, options.destination, 'utf8', function(err, content) {
          var exec_cmd;
          if (err) {
            return callback(err);
          }
          exec_cmd = /exec (.*) \$@/.exec(content)[1];
          return callback(null, exec_cmd && exec_cmd === options.source);
        });
      });
    };
    exec_create = function(options, callback) {
      var content;
      content = "#!/bin/bash\nexec " + options.source + " $@";
      return fs.writeFile(options.ssh, options.destination, content, function(err) {
        if (err) {
          return callback(err);
        }
        return fs.chmod(options.ssh, options.destination, options.mode, function(err) {
          if (err) {
            return callback(err);
          }
          linked++;
          return callback();
        });
      });
    };
    return each(options).parallel(goptions.parallel).on('item', function(options, next) {
      var do_dispatch, do_mkdir;
      if (!options.source) {
        return next(new Error("Missing source, got " + (JSON.stringify(options.source))));
      }
      if (!options.destination) {
        return next(new Error("Missing destination, got " + (JSON.stringify(options.destination))));
      }
      if (options.mode == null) {
        options.mode = 0x1ed;
      }
      do_mkdir = function() {
        return mkdir({
          ssh: options.ssh,
          destination: path.dirname(options.destination)
        }, function(err, created) {
          if (err && err.code !== 'EEXIST') {
            return callback(err);
          }
          return do_dispatch();
        });
      };
      do_dispatch = function() {
        if (options.exec) {
          return exec_exists(options, function(err, exists) {
            if (exists) {
              return next();
            }
            return exec_create(options, next);
          });
        } else {
          return sym_exists(options, function(err, exists) {
            if (exists) {
              return next();
            }
            return sym_create(options, next);
          });
        }
      };
      return do_mkdir();
    }).on('both', function(err) {
      return callback(err, linked);
    });
  });
  return result;
};