git rev-parse –show-toplevel could be enough if executed within a git repo. From git rev-parse man page: –show-toplevel Show the absolute path of the top-level directory. For older versions (before 1.7.x), the other options are listed in “Is there a way to get the git root directory in one command?”: git rev-parse –git-dir That would … Read more
parent.env is the environment in which a closure (e.g., function) is defined. parent.frame is the environment from which the closure was invoked. f = function() c(f=environment(), defined_in=parent.env(environment()), called_from=parent.frame()) g = function() c(g=environment(), f()) and then > g() $g <environment: 0x14060e8> $f <environment: 0x1405f28> $defined_in <environment: R_GlobalEnv> $called_from <environment: 0x14060e8> I’m not sure when a mere … Read more
Try: System.Environment.GetEnvironmentVariable(“USERPROFILE”); Edit: If the version of .NET you are using is 4 or above, you can use the Environment.SpecialFolder enumeration: Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
The main difference with shell config files is that some are only read by “login” shells (eg. when you login from another host, or login at the text console of a local unix machine). these are the ones called, say, .login or .profile or .zlogin (depending on which shell you’re using). Then you have config … Read more
For general application configuration that doesn’t need to be stored in a database table, I like to create a config.yml file within the config directory. For your example, it might look like this: defaults: &defaults audiocast_uri_format: http://blablalba/blabbitybla/yadda development: <<: *defaults test: <<: *defaults production: <<: *defaults This configuration file gets loaded from a custom initializer … Read more
Just a quick note/summary for any who came here via Google looking for the answer to the general question asked in the title (as I was). Any of the following should work for getting access to shell variables inside quotes: echo “$VARIABLE” echo “${VARIABLE}” Use of single quotes is the main issue. According to the … Read more
The reason you separate the login and non-login shell is because the .bashrc file is reloaded every time you start a new copy of Bash. The .profile file is loaded only when you either log in or use the appropriate flag to tell Bash to act as a login shell. Personally, I put my PATH … Read more
On Linux, the symlink /proc/<pid>/exe has the path of the executable. Use the command readlink -f /proc/<pid>/exe to get the value. On AIX, this file does not exist. You could compare cksum <actual path to binary> and cksum /proc/<pid>/object/a.out.
From within rails you can create a configuration object and obtain the necessary information from it: config = Rails.configuration.database_configuration host = config[Rails.env][“host”] database = config[Rails.env][“database”] username = config[Rails.env][“username”] password = config[Rails.env][“password”] See the documentation for Rails::Configuration for details. This just uses YAML::load to load the configuration from the database configuration file (database.yml) which you can … Read more
To get the currently logged in user: System.getProperty(“user.name”); //platform independent and the hostname of the machine: java.net.InetAddress localMachine = java.net.InetAddress.getLocalHost(); System.out.println(“Hostname of local machine: ” + localMachine.getHostName());