Add nodejs.install() for "typical" nvm / node.js install

also some related tweaks, necessary for that

rattail_fabric2/nodejs.py

@@ -0,0 +1,57 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  Rattail -- Retail Software Framework
+#  Copyright © 2010-2019 Lance Edgar
+#
+#  This file is part of Rattail.
+#
+#  Rattail is free software: you can redistribute it and/or modify it under the
+#  terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Fabric library for Node.js
+"""
+
+import os
+
+from rattail_fabric2 import append, exists
+from rattail_fabric2.util import get_home_path
+
+
+def install(c, user=None):
+    """
+    Install nvm and node.js for given user, or else "connection" user.
+    """
+    home = get_home_path(c, user)
+    nvm = os.path.join(home, '.nvm')
+
+    if not exists(c, nvm):
+        cmd = "bash -c 'curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.5/install.sh | bash'"
+        if user:
+            c.sudo(cmd, user=user)
+        else:
+            c.run(cmd)
+
+    profile = os.path.join(home, '.profile')
+    kwargs = {'use_sudo': bool(user)}
+    append(c, profile, 'export NVM_DIR="{}"'.format(nvm), **kwargs)
+    append(c, profile, '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"', **kwargs)
+    append(c, profile, '[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"', **kwargs)
+
+    cmd = "bash -l -c 'nvm install node'"
+    if user:
+        c.sudo(cmd, user=user)
+    else:
+        c.run(cmd)

rattail_fabric2/util.py

@@ -119,7 +119,10 @@ def append(c, filename, text, use_sudo=False, partial=False, escape=True,
             and contains(c, filename, regex, use_sudo=use_sudo, escape=False,
                          shell=shell)):
             continue
-        line = line.replace("'", r"'\\''") if escape else line
+        if escape:
+            line = line.replace("'", r"'\\''") # TODO: does this one even work?
+            line = line.replace('"', r'\"')
+            line = line.replace('$', r'\$')
         func("""bash -c "echo '%s' >> %s" """ % (line, _expand_path(c, filename)))
 
 
@@ -178,3 +181,14 @@ def _expand_path(c, path):
        This function is derived from one copied from fabric v1.
     """
     return path if is_win(c) else '"$(echo %s)"' % path
+
+
+def get_home_path(c, user=None):
+    """
+    Retrieve the path to the home folder for the given user, or else the
+    "connection" user.
+    """
+    user = user or c.user
+    home = c.run('getent passwd {} | cut -d: -f6'.format(user)).stdout.strip()
+    home = home.rstrip('/')
+    return home