Merge pull request #638 from fontivan/sskeard/cnf-13015-cpu-architect…

…ure-vendor-detection-tuned

CNF-13015: Add helper function to run `lscpu` and parse result using regex parameters

tuned/profiles/functions/function_lscpu_check.py

@@ -0,0 +1,33 @@
+import re
+import tuned.logs
+from . import base
+
+log = tuned.logs.get()
+
+class lscpu_check(base.Function):
+	"""
+	Checks regexes against the output of lscpu. Accepts arguments in the
+	following form: REGEX1, STR1, REGEX2, STR2, ...[, STR_FALLBACK]
+	If REGEX1 matches something in the output it expands to STR1,
+	if REGEX2 matches it expands to STR2. It stops on the first match,
+	i.e. if REGEX1 matches, no more regexes are processed. If none
+	regex matches it expands to STR_FALLBACK. If there is no fallback,
+	it expands to empty string.
+	"""
+	def __init__(self):
+		# unlimited number of arguments, min 2 arguments
+		super(lscpu_check, self).__init__("lscpu_check", 0, 2)
+
+	def execute(self, args):
+		if not super(lscpu_check, self).execute(args):
+			return None
+		# Stdout is the 2nd result from the execute call
+		_, lscpu = self._cmd.execute("lscpu")
+		for i in range(0, len(args), 2):
+			if i + 1 < len(args):
+				if re.search(args[i], lscpu, re.MULTILINE):
+					return args[i + 1]
+		if len(args) % 2:
+			return args[-1]
+		else:
+			return ""