make backwards compatibility deps optional

.travis.yml

@@ -59,7 +59,7 @@ matrix:
  - nvm install 14
  - pip install --upgrade pip
  - python setup.py bdist_wheel
- - pip install dist/*.whl
+ - pip install `ls dist/*.whl`[compat]
  script:
  - cd tests
  - mkdir css && wq init && wq scss --indir scss --outdir css

build/compilers.py

@@ -3,14 +3,8 @@
 
 import os
 import json
-
-import scss as pyScss
 import logging
-import pystache
-
 from .collect import readfiles
-import requirejs
-from babeljs import transformer as babeljs
 
 
 @wq.command()
@@ -26,6 +20,11 @@ def optimize(config):
  wq.app 2.0. For full control over the compilation process, use
  `wq start --with-npm` instead.
  """
+ try:
+ import requirejs
+ except ImportError:
+ raise NotInstalled('requirejs')
+
  conf = config.get('optimize', None)
  if not conf:
  raise click.UsageError(
@@ -55,6 +54,11 @@ def babel(config):
  Note that this command will be removed in wq.app 2.0 in favor of
  `wq start --with-npm`.
  """
+ try:
+ from babeljs import transformer as babeljs
+ except ImportError:
+ raise NotInstalled('PyBabeljs')
+
  rconf = config.get('optimize', None)
  if not rconf:
  raise click.UsageError(
@@ -108,6 +112,11 @@ def scss(**conf):
  Note: This command will be removed in wq.app 2.0 in favor of
  Material UI themes.
  """
+ try:
+ import scss as pyScss
+ except ImportError:
+ raise NotInstalled("pyScss")
+
  compiler = pyScss.Scss(scss_opts={'compress': 0})
  logging.getLogger("scss").addHandler(logging.StreamHandler())
 
@@ -168,6 +177,11 @@ def mustache(**conf):
 
  Note: This command will be removed in wq.app 2.0 in favor of JSX.
  """
+ try:
+ import pystache
+ except ImportError:
+ raise NotInstalled('pystache')
+
  template = conf['template']
  if template is None:
  return
@@ -196,3 +210,11 @@ def mustache(**conf):
  f = open(conf['output'], 'w')
  f.write(html)
  f.close()
+
+
+class NotInstalled(click.ClickException):
+ def __init__(self, dep):
+ super().__init__(
+ "Could not find {}. Install compat dependencies via:"
+ "\n pip install wq.app[compat]".format(dep)
+ )

build/init.py

@@ -2,6 +2,7 @@
 from wq.core import wq
 from os.path import exists, join, dirname
 from os import symlink, mkdir
+from .compilers import NotInstalled
 
 
 @wq.command()
@@ -66,6 +67,10 @@ def maybe_symlink(source, dest):
  maybe_symlink(join(wqpath, 'wq'), join(projpath, 'wq'))
  if name == "scss" and not exists(join(projpath, 'compass')):
  # myapp/scss/lib/compass -> compass_stylesheets/stylesheets/compass
+ try:
+ import compass_stylesheets # noqa
+ except ImportError:
+ raise NotInstalled("compass_stylesheets")
  import pkg_resources
  compass = pkg_resources.resource_filename(
  'compass_stylesheets',

build/phonegap.py

@@ -1,13 +1,12 @@
-import requests
 from wq.core import wq
 import click
 import os
 import yaml
 import json
 import shutil
-import pystache
 from .icons import icons, SIZES
 import time
+from .compilers import NotInstalled
 
 
 @wq.command()
@@ -55,6 +54,16 @@ def phonegap(ctx, config, version, **conf):
  React Native and/or Expo, together with @wq/react and @wq/material.
  """
 
+ try:
+ import requests # noqa
+ except ImportError:
+ raise NotInstalled('requests')
+
+ try:
+ import pystache # noqa
+ except ImportError:
+ raise NotInstalled('pystache')
+
  click.echo(
  "Warning: PhoneGap Build is offline; this command will likely fail."
  )
@@ -117,6 +126,8 @@ def phonegap(ctx, config, version, **conf):
 
 def create_zipfile(directory, source, version, context,
  icon=None, splash=None, config_xml=None, index_html=None):
+ import pystache
+
  folder = os.path.join(directory, 'build')
  if os.path.exists(folder):
  shutil.rmtree(folder)
@@ -198,6 +209,8 @@ def get_height(size):
 
 
 def upload_zipfile(directory, filename, token, pgb_api):
+ import requests
+
  pgb_url = pgb_api + "{path}?auth_token={token}"
  app_id = get_pgb_config(directory, 'app_id')
  if app_id:
@@ -268,6 +281,8 @@ def check_error(response):
 
 
 def get_token(directory, token_url):
+ import requests
+
  token = get_pgb_config(directory, 'token')
  if token:
  return token

setup.py

@@ -77,15 +77,19 @@ def create_wq_namespace():
  include_package_data=True,
  install_requires=[
  'wq.core',
- 'pyScss>=1.3',
- 'compass-stylesheets==0.12.6',
  'PyYAML',
- 'requests',
- 'pystache',
  'Pillow',
- 'requirejs>=0.2.0',
- 'PyBabeljs',
  ],
+ extras_require={
+ 'compat': [
+ 'pyScss>=1.3',
+ 'compass-stylesheets==0.12.6',
+ 'requests',
+ 'pystache',
+ 'requirejs>=0.2.0',
+ 'PyBabeljs',
+ ]
+ },
  namespace_packages=['wq'],
  description=LONG_DESCRIPTION.strip(),
  long_description=readme(),