Add htpasswd module

Add a new module for managing entries in an htpasswd file, used
for basic authentication with web servers such as Apache and Nginx

library/web_infrastructure/htpasswd

@@ -0,0 +1,162 @@
+#!/usr/bin/env python
+DOCUMENTATION = """
+module: htpasswd
+short_description: manage user files for basic authentication
+description:
+  - Add and remove username/password entries in a password file using htpasswd.
+  - This is used by web servers such as Apache and Nginx for basic authentication.
+options:
+  path:
+    required: true
+    aliases: [ dest, destfile ]
+    description:
+      - Path to the file that contains the usernames and passwords
+  name:
+    required: true
+    aliases: [ username ]
+    description:
+      - User name to add or remove
+  password:
+    required: false
+    description:
+      - Password associated with user.
+      - Must be specified if user does not exist yet
+  state:
+    required: false
+    choices: [ present, absent ]
+    default: "present"
+    description:
+      - Whether the user entry should be present or not
+  create:
+    required: false
+    choices: [ "yes", "no" ]
+    default: "yes"
+    description:
+      - Used with C(state=present). If specified, the file will be created
+        if it does not already exist. If set to "no", will fail if the
+        file does not exist
+requires: [ passlib>=1.6 ]
+author: Lorin Hochstein
+"""
+
+EXAMPLES = """
+# Add a user to a password file and ensure permissions are set
+- htpasswd: path=/etc/nginx/passwdfile name=janedoe password=9s36?;fyNp owner=root group=www-data mode=0640
+# Remove a user from a password file
+- htpasswd: path=/etc/apache2/passwdfile name=foobar state=absent
+"""
+
+
+import os
+
+try:
+    from passlib.apache import HtpasswdFile
+except ImportError:
+    passlib_installed = False
+else:
+    passlib_installed = True
+
+
+def create_missing_directories(dest):
+    destpath = os.path.dirname(dest)
+    if not os.path.exists(destpath):
+        os.makedirs(destpath)
+
+
+def present(dest, username, password, create, check_mode):
+    """ Ensures user is present
+
+    Returns (msg, changed) """
+    if not os.path.exists(dest):
+        if not create:
+            raise ValueError('Destination %s does not exist' % dest)
+        if check_mode:
+            return ("Create %s" % dest, True)
+        create_missing_directories(dest)
+        ht = HtpasswdFile(dest, new=True)
+        ht.set_password(username, password)
+        ht.save()
+        return ("Created %s and added %s" % (dest, username), True)
+    else:
+        ht = HtpasswdFile(dest, new=False)
+        if ht.check_password(username, password):
+            return ("%s already present" % username, False)
+        else:
+            if not check_mode:
+                ht.set_password(username, password)
+                ht.save()
+            return ("Add/update %s" % username, True)
+
+
+def absent(dest, username, check_mode):
+    """ Ensures user is absent
+
+    Returns (msg, changed) """
+    if not os.path.exists(dest):
+        raise ValueError("%s does not exists" % dest)
+
+    ht = HtpasswdFile(dest, new=False)
+    if username not in ht.users():
+        return ("%s not present" % username, False)
+    else:
+        if not check_mode:
+            ht.delete(username)
+            ht.save()
+        return ("Remove %s" % username, True)
+
+
+def check_file_attrs(module, changed, message):
+
+    file_args = module.load_file_common_arguments(module.params)
+    if module.set_file_attributes_if_different(file_args, False):
+
+        if changed:
+            message += " and "
+        changed = True
+        message += "ownership, perms or SE linux context changed"
+
+    return message, changed
+
+
+def main():
+    arg_spec = dict(
+        path=dict(required=True, aliases=["dest", "destfile"]),
+        name=dict(required=True, aliases=["username"]),
+        password=dict(required=False, default=None),
+        state=dict(required=False, default="present"),
+        create=dict(type='bool', choices=BOOLEANS, default='yes'),
+
+    )
+    module = AnsibleModule(argument_spec=arg_spec,
+                           add_file_common_args=True,
+                           supports_check_mode=True)
+
+    path = module.params['path']
+    username = module.params['name']
+    password = module.params['password']
+    state = module.params['state']
+    create = module.params['create']
+    check_mode = module.check_mode
+
+    if not passlib_installed:
+        module.fail_json(msg="This module requires the passlib Python library")
+
+    try:
+        if state == 'present':
+            (msg, changed) = present(path, username, password, create, check_mode)
+        elif state == 'absent':
+            (msg, changed) = absent(path, username, check_mode)
+        else:
+            module.fail_json(msg="Invalid state: %s" % state)
+
+        check_file_attrs(module, changed, msg)
+        module.exit_json(msg=msg, changed=changed)
+    except Exception, e:
+        module.fail_json(msg=str(e))
+
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+
+if __name__ == '__main__':
+    main()