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Raise ImportError for missing 'hstcal' binaries #168

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Raise ImportError for missing 'hstcal' binaries #168

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4974a72
Check the $PATH for hstcal binaries (cs0.e) when importing stistools.…
sean-lockwood Dec 4, 2024
f226d87
Allow cs0.e to be undefined when building on readthedocs.
sean-lockwood Jan 3, 2025
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3 changes: 3 additions & 0 deletions stistools/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,9 @@
from __future__ import absolute_import
from .version import *

from .r_util import check_hstcal_status
check_hstcal_status() # Is the 'hstcal' dependency installed?

from . import calstis
from . import basic2d
from . import ocrreject
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9 changes: 9 additions & 0 deletions stistools/r_util.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import os
import os.path
import copy
import shutil


NOT_APPLICABLE = 'n/a'
Expand Down Expand Up @@ -84,3 +85,11 @@ def interpolate(x, values, xp):
break

return value


def check_hstcal_status():
on_readthedocs = os.environ.get('READTHEDOCS', 'False') == 'True'

if not on_readthedocs and not shutil.which('cs0.e'):
raise ImportError("The 'hstcal' package binaries were not found in $PATH. "
"Please check that it is installed.")