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#!/usr/bin/env python3
"""Compiles a source file and checks errors against those listed in the file.
Parameters:
sys.argv[1]: a source file with contains the input and expected output
sys.argv[2]: the Flang frontend driver
sys.argv[3:]: Optional arguments to the Flang frontend driver"""
import sys
import re
import tempfile
import subprocess
import common as cm
from difflib import unified_diff
cm.check_args(sys.argv)
srcdir = cm.set_source(sys.argv[1])
with open(srcdir, "r") as f:
src = f.readlines()
actual = ""
expect = ""
diffs = ""
log = ""
flang_fc1 = cm.set_executable(sys.argv[2])
flang_fc1_args = sys.argv[3:]
flang_fc1_options = "-fsyntax-only"
# Compiles, and reads in the output from the compilation process
cmd = [flang_fc1, *flang_fc1_args, flang_fc1_options, str(srcdir)]
with tempfile.TemporaryDirectory() as tmpdir:
try:
proc = subprocess.run(
cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=True,
universal_newlines=True,
cwd=tmpdir,
)
except subprocess.CalledProcessError as e:
log = e.stderr
if e.returncode >= 128:
print(f"{log}")
sys.exit(1)
# Cleans up the output from the compilation process to be easier to process
for line in log.split("\n"):
m = re.search(r"[^:]*:(\d+:).*(?:error|warning|portability|because):(.*)", line)
if m:
if re.search(r"warning: .*fold.*host", line):
continue # ignore host-dependent folding warnings
actual += m.expand(r"\1\2\n")
# Gets the expected errors and their line numbers
errors = []
for i, line in enumerate(src, 1):
m = re.search(r"(?:^\s*!\s*(?:ERROR|WARNING|PORTABILITY|BECAUSE): )(.*)", line)
if m:
errors.append(m.group(1))
continue
if errors:
for x in errors:
expect += f"{i}: {x}\n"
errors = []
# Compares the expected errors with the compiler errors
for line in unified_diff(actual.split("\n"), expect.split("\n"), n=0):
line = re.sub(r"(^\-)(\d+:)", r"\nactual at \g<2>", line)
line = re.sub(r"(^\+)(\d+:)", r"\nexpect at \g<2>", line)
diffs += line
if diffs != "":
print(diffs)
print()
print("FAIL")
sys.exit(1)
else:
print()
print("PASS")
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