add ability to define the default profile using an environment variable

README.md

@@ -200,6 +200,9 @@ For more options see `dotdrop.sh --help`.
 For easy deployment the default profile used by dotdrop reflects the
 hostname of the host on which it runs.
 
+The default profile used can be changed by defining
+the `DOTDROP_PROFILE` environment variable.
+
 ## Install dotfiles
 
 Simply run
@@ -207,8 +210,9 @@ Simply run
 $ dotdrop.sh install
 ```
 
-Use the `--profile` switch to specify a profile if not using
-the host's hostname.
+Use the `--profile` switch to specify a different profile than
+the host's hostname or define it through the `DOTDROP_PROFILE`
+environment variable.
 
 ## Compare dotfiles
 
@@ -256,9 +260,12 @@ $ dotdrop.sh list
 ```
 
 Dotdrop allows to choose which profile to use
-with the *--profile* switch if you use something
+with the `--profile` switch if you use something
 else than the default (the hostname).
 
+The default profile can be changed by defining the
+`DOTDROP_PROFILE` environment variable.
+
 ## List dotfiles
 
 The following command lists the different dotfiles

dotdrop/dotdrop.py

@@ -24,7 +24,10 @@ from dotdrop.utils import *
 
 CUR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 LOG = Logger()
-HOSTNAME = socket.gethostname()
+ENV_PROFILE = 'DOTDROP_PROFILE'
+PROFILE = socket.gethostname()
+if ENV_PROFILE in os.environ:
+    PROFILE = os.environ[ENV_PROFILE]
 TILD = '~'
 TRANS_SUFFIX = 'trans'
 
@@ -64,7 +67,7 @@ Options:
   -v --version            Show version.
   -h --help               Show this screen.
 
-""".format(BANNER, HOSTNAME)
+""".format(BANNER, PROFILE)
 
 ###########################################################
 # entry point
@@ -322,6 +325,7 @@ def main():
     """entry point"""
     ret = True
     args = docopt(USAGE, version=VERSION)
+
     try:
         conf = Cfg(os.path.expanduser(args['--cfg']))
     except ValueError as e: