53 lines
1.5 KiB
Text
53 lines
1.5 KiB
Text
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#!/usr/bin/env python3
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# thin layer around /usr/lib/apt/solvers/apt, so that we can capture the solver
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# result
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#
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# we set Debug::EDSP::WriteSolution=yes so that Install stanzas also come with
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# Package and Version fields. That way, we do not also have to parse the EDSP
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# request and spend time matching ID numbers
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import subprocess
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import sys
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import os
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import getpass
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if not os.path.exists("/usr/lib/apt/solvers/apt"):
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print(
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"""Error: ERR_NO_SOLVER
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Message: The external apt solver doesn't exist. You must install the apt-utils package.
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"""
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)
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exit()
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fname = os.environ.get("APT_EDSP_DUMP_FILENAME")
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if fname is None:
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print(
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"""Error: ERR_NO_FILENAME
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Message: You have to set the environment variable APT_EDSP_DUMP_FILENAME
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to a valid filename to store the dump of EDSP solver input in.
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For example with: export APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp
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"""
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)
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exit()
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try:
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with open(fname, "w") as f:
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with subprocess.Popen(
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["/usr/lib/apt/solvers/apt", "-oDebug::EDSP::WriteSolution=yes"],
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stdin=sys.stdin.fileno(),
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stdout=subprocess.PIPE,
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bufsize=0, # unbuffered
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text=True, # open in text mode
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) as p:
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for line in p.stdout:
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print(line, end="")
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f.write(line)
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except (FileNotFoundError, PermissionError) as e:
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print(
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"""Error: ERR_CREATE_FILE
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Message: Writing EDSP solver input to file '%s' failed as it couldn't be created!
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"""
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% fname
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)
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