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"""
Database and Database Path Management
"""
import os
from os import path
import json
import subprocess
def get_trellis_root():
"""Return the absolute path to the Project Trellis repo root"""
return path.abspath(path.join(__file__, "../../../"))
def get_db_root():
"""
Return the path containing the Project Trellis database
This is database/ in the repo, unless the `PRJTRELLIS_DB` environment
variable is set to another value.
"""
if "PRJTRELLIS_DB" in os.environ and os.environ["PRJTRELLIS_DB"] != "":
return os.environ["PRJTRELLIS_DB"]
else:
return path.join(get_trellis_root(), "database")
def get_db_subdir(family = None, device = None, package = None):
"""
Return the DB subdirectory corresponding to a family, device and
package (all if applicable), creating it if it doesn't already
exist.
"""
subdir = get_db_root()
dparts = [family, device, package]
for dpart in dparts:
if dpart is None:
break
subdir = path.join(subdir, dpart)
if not path.exists(subdir):
os.mkdir(subdir)
return subdir
def get_tilegrid(family, device):
"""
Return the deserialised tilegrid for a family, device
"""
tgjson = path.join(get_db_subdir(family, device), "tilegrid.json")
with open(tgjson, "r") as f:
return json.load(f)
def get_devices():
"""
Return the deserialised content of devices.json
"""
djson = path.join(get_db_root(), "devices.json")
with open(djson, "r") as f:
return json.load(f)
def get_db_commit():
return subprocess.getoutput('git -C "{}" rev-parse HEAD'.format(get_db_root()))
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