Put the 'which' function into shared code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/functional/qemu_test/__init__.py |  2 +-
 tests/functional/qemu_test/cmd.py      | 10 ++++++++++
 tests/functional/test_acpi_bits.py     | 13 +------------
 tests/functional/test_ppc64_hv.py      | 13 +------------
 4 files changed, 13 insertions(+), 25 deletions(-)

diff --git a/tests/functional/qemu_test/__init__.py b/tests/functional/qemu_test/__init__.py
index 67f87be9c4..8fddddbe67 100644
--- a/tests/functional/qemu_test/__init__.py
+++ b/tests/functional/qemu_test/__init__.py
@@ -10,6 +10,6 @@
 from .config import BUILD_DIR
 from .cmd import has_cmd, has_cmds, run_cmd, is_readable_executable_file, \
     interrupt_interactive_console_until_pattern, wait_for_console_pattern, \
-    exec_command, exec_command_and_wait_for_pattern, get_qemu_img
+    exec_command, exec_command_and_wait_for_pattern, get_qemu_img, which
 from .testcase import QemuBaseTest, QemuUserTest, QemuSystemTest
 from .linuxkernel import LinuxKernelTest
diff --git a/tests/functional/qemu_test/cmd.py b/tests/functional/qemu_test/cmd.py
index 11c8334a7c..4106f1ee7c 100644
--- a/tests/functional/qemu_test/cmd.py
+++ b/tests/functional/qemu_test/cmd.py
@@ -18,6 +18,16 @@
 
 from .config import BUILD_DIR
 
+def which(tool):
+    """ looks up the full path for @tool, returns None if not found
+        or if @tool does not have executable permissions.
+    """
+    paths=os.getenv('PATH')
+    for p in paths.split(os.path.pathsep):
+        p = os.path.join(p, tool)
+        if os.path.exists(p) and os.access(p, os.X_OK):
+            return p
+    return None
 
 def has_cmd(name, args=None):
     """
diff --git a/tests/functional/test_acpi_bits.py b/tests/functional/test_acpi_bits.py
index 3df9562394..1e6d082ecb 100755
--- a/tests/functional/test_acpi_bits.py
+++ b/tests/functional/test_acpi_bits.py
@@ -47,7 +47,7 @@
 )
 from qemu.machine import QEMUMachine
 from unittest import skipIf
-from qemu_test import QemuSystemTest, Asset
+from qemu_test import QemuSystemTest, Asset, which
 
 deps = ["xorriso", "mformat"] # dependent tools needed in the test setup/box.
 supported_platforms = ['x86_64'] # supported test platforms.
@@ -55,17 +55,6 @@
 # default timeout of 120 secs is sometimes not enough for bits test.
 BITS_TIMEOUT = 200
 
-def which(tool):
-    """ looks up the full path for @tool, returns None if not found
-        or if @tool does not have executable permissions.
-    """
-    paths=os.getenv('PATH')
-    for p in paths.split(os.path.pathsep):
-        p = os.path.join(p, tool)
-        if os.path.exists(p) and os.access(p, os.X_OK):
-            return p
-    return None
-
 def missing_deps():
     """ returns True if any of the test dependent tools are absent.
     """
diff --git a/tests/functional/test_ppc64_hv.py b/tests/functional/test_ppc64_hv.py
index d97b62e364..7c6f8234f5 100755
--- a/tests/functional/test_ppc64_hv.py
+++ b/tests/functional/test_ppc64_hv.py
@@ -11,7 +11,7 @@
 
 from unittest import skipIf, skipUnless
 from qemu_test import QemuSystemTest, Asset
-from qemu_test import wait_for_console_pattern, exec_command
+from qemu_test import wait_for_console_pattern, exec_command, which
 import os
 import time
 import subprocess
@@ -19,17 +19,6 @@
 
 deps = ["xorriso"] # dependent tools needed in the test setup/box.
 
-def which(tool):
-    """ looks up the full path for @tool, returns None if not found
-        or if @tool does not have executable permissions.
-    """
-    paths=os.getenv('PATH')
-    for p in paths.split(os.path.pathsep):
-        p = os.path.join(p, tool)
-        if os.path.exists(p) and os.access(p, os.X_OK):
-            return p
-    return None
-
 def missing_deps():
     """ returns True if any of the test dependent tools are absent.
     """
-- 
2.46.0