tests/functional: Convert the m68k nextcube test with tesseract

The code that handles running of tesseract needs to be tweaked a little
bit to be able to run without the functions from avocado.utils, and
while we're at it, drop some legacy stuff that was still there due to
Tesseract 3 support that we already dropped a while ago.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240830133841.142644-29-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional/qemu_test/tesseract.py

@@ -0,0 +1,35 @@
+# ...
+#
+# Copyright (c) 2019 Philippe Mathieu-Daudé <f4bug@amsat.org>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later. See the COPYING file in the top-level directory.
+
+import re
+import logging
+
+from . import has_cmd, run_cmd
+
+def tesseract_available(expected_version):
+    if not has_cmd('tesseract'):
+        return False
+    (stdout, stderr, ret) = run_cmd([ 'tesseract', '--version'])
+    if ret:
+        return False
+    version = stdout.split()[1]
+    return int(version.split('.')[0]) >= expected_version
+
+def tesseract_ocr(image_path, tesseract_args=''):
+    console_logger = logging.getLogger('console')
+    console_logger.debug(image_path)
+    (stdout, stderr, ret) = run_cmd(['tesseract', image_path,
+                                     'stdout'])
+    if ret:
+        return None
+    lines = []
+    for line in stdout.split('\n'):
+        sline = line.strip()
+        if len(sline):
+            console_logger.debug(sline)
+            lines += [sline]
+    return lines