[DeprecationWarning] Absolute template path names are deprecated

[koddr]

Hello.

• Python: 3.6.4
• Bottle: 0.12.13

I'm using Pipenv for manage virtual envs.

Code

# run.py

# Import Python packages
import os, json, bottle
from bottle import run, response, static_file
from bottle import jinja2_template as template
# Import Bottle Extensions
from bottle_sqlalchemy import SQLAlchemyPlugin
# Import SQLAlchemy
from sqlalchemy import create_engine, Column, Integer, String, Text
from sqlalchemy.ext.declarative import declarative_base

# Define dirs
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
STATIC_DIR = os.path.join(BASE_DIR, 'static')

# App Config
bottle.TEMPLATE_PATH.insert(0, os.path.join(BASE_DIR, 'templates'))
bottle.debug(True)  # Don't forget switch this to `False` on production!

# SQLite Database config
Base = declarative_base()
db_engine = create_engine('sqlite:///' + os.path.join(BASE_DIR, 'articles.db'))

# Starting App
app = bottle.default_app()

# Install Bottle plugins
app.install(SQLAlchemyPlugin(db_engine, keyword='sqlite_db'))


# Articles Database class
class ArticlesDB(Base):
    __tablename__ = 'articles'
    id = Column(Integer, primary_key=True)
    title = Column(String(255), nullable=False)
    description = Column(Text())


# API routes
@app.get('/api/articles/')
def get_all_articles(sqlite_db):
    """Get all Articles from Database"""
    articles = []
    articles_query = sqlite_db.query(ArticlesDB).all()

    for i in articles_query:
        articles.append({
            'title': i.title,
            'description': i.description
        })

    response.headers['Content-Type'] = 'application/json'
    return json.dumps({'data': articles})


# Index page route
@app.get('/')
def show_index():
    """Show Index page"""
    return template('index')


# Static files route
@app.get('/static/<filename:path>')
def get_static_files(filename):
    """Get Static files"""
    return static_file(filename, root=STATIC_DIR)


# Run server
run(app, server='auto', host='localhost', port=8080, reloader=True)

Error

127.0.0.1 - - [16/Jan/2018 12:48:28] "GET /api/articles/ HTTP/1.1" 200 255

/Users/username/.local/share/virtualenvs/bottle-demo--x_uE0XF/lib/python3.6/site-packages/bottle.py:3335: 

DeprecationWarning: Absolute template path names are deprecated.
    fname = self.search(name, self.lookup)

On 3335 line of bottle.py (in my fresh env), I have functionloader:

...
    def loader(self, name):
        fname = self.search(name, self.lookup)  # <-- this line is 3335
        if not fname: return
        with open(fname, "rb") as f:
            return f.read().decode(self.encoding)
...

But in this repository line 3335 have not similar function. Will be nice to push new version of Bottle to stable branch 👍