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support/testing: factor out run_cmd_on_host

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Currently many test cases call subprocess.check_output on their own.
Factor out that code to an infra method so the call get standardized.

This will be handful when switching the test infra to use Python 3.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Ricardo Martincoski
2019-08-08 20:10:13 -03:00
committed by Thomas Petazzoni
parent 1b2928201f
commit 620c98a214
7 changed files with 18 additions and 26 deletions
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13
support/testing/infra/__init__.py
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@@ -55,6 +55,15 @@ def download(dldir, filename):
return finalpath
def run_cmd_on_host(builddir, cmd):
"""Call subprocess.check_output and return the text output."""
out = subprocess.check_output(cmd,
stderr=open(os.devnull, "w"),
cwd=builddir,
env={"LANG": "C"})
return out
def get_elf_arch_tag(builddir, prefix, fpath, tag):
"""
Runs the cross readelf on 'fpath', then extracts the value of tag 'tag'.
@@ -66,7 +75,7 @@ def get_elf_arch_tag(builddir, prefix, fpath, tag):
"""
cmd = ["host/bin/{}-readelf".format(prefix),
"-A", os.path.join("target", fpath)]
out = subprocess.check_output(cmd, cwd=builddir, env={"LANG": "C"})
out = run_cmd_on_host(builddir, cmd)
regexp = re.compile("^ {}: (.*)$".format(tag))
for line in out.splitlines():
m = regexp.match(line)
@@ -93,7 +102,7 @@ def get_elf_prog_interpreter(builddir, prefix, fpath):
"""
cmd = ["host/bin/{}-readelf".format(prefix),
"-l", os.path.join("target", fpath)]
out = subprocess.check_output(cmd, cwd=builddir, env={"LANG": "C"})
out = run_cmd_on_host(builddir, cmd)
regexp = re.compile("^ *\[Requesting program interpreter: (.*)\]$")
for line in out.splitlines():
m = regexp.match(line)