doc: sort file lists in API generators

In order to build the documentation in a reproducible manner,
sort the lists of files used as input,
since walking the filesystem is not guaranteed to be done in a stable order.
When converting the scripts from shell to python, sorting the input was lost.

Fixes: 53bb9a073f ("doc: rewrite shell scripts in Python")
Cc: stable@dpdk.org

Signed-off-by: Luca Boccassi <bluca@debian.org>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

doc/api/generate_doxygen.py

@@ -13,7 +13,7 @@
     subprocess.run(doxygen_command, check=True, stdout=out)
 with open(out_file) as out, open(dep_file, 'w') as dep:
     print(f'{out_dir}:', end=' ', file=dep)
-    for line in out:
+    for line in sorted(out):
         match = re.match(pattern, line)
         if match:
             print(match.group(1), end=' ', file=dep)

doc/api/generate_examples.py

@@ -11,7 +11,7 @@
 with open(f'{api_examples}.d', 'w') as dep:
     print(f'{api_examples}:', end=' ', file=dep)
     for root, _, files in os.walk(examples_dir):
-        for name in files:
+        for name in sorted(files):
             is_source = name.endswith('.c')
             if is_source or name == 'meson.build':
                 path = os.path.join(root, name)
@@ -23,7 +23,7 @@
     print('''/**
 @page examples DPDK Example Programs
 ''', file=out)
-    for path in sources:
+    for path in sorted(sources):
         # Produce consistent output with forward slashes on all systems.
         # Every \ in paths within examples directory is a separator, not escape.
         relpath = os.path.relpath(path, examples_dir).replace('\\', '/')