doc: rewrite shell scripts in Python

Shell used in documentation generation could not run on Windows.
Rewrite scripts in Python.
New scripts use proper path separators and handle paths with spaces.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Reviewed-by: Bruce Richardson <bruce.richardson@intel.com>

doc/api/generate_doxygen.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# (c) 2018 Luca Boccassi <bluca@debian.org>
+# (c) 2022 Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
+
+import os, re, subprocess, sys
+
+pattern = re.compile('^Preprocessing (.*)...$')
+out_dir, *doxygen_command = sys.argv[1:]
+out_file = os.path.join(os.path.dirname(out_dir), 'doxygen.out')
+dep_file = f'{out_dir}.d'
+with open(out_file, 'w') as out:
+    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:
+        match = re.match(pattern, line)
+        if match:
+            print(match.group(1), end=' ', file=dep)

doc/api/generate_doxygen.sh

@@ -1,12 +0,0 @@
-#! /bin/sh -e
-# SPDX-License-Identifier: BSD-3-Clause
-# Copyright 2018 Luca Boccassi <bluca@debian.org>
-
-DOXYCONF=$1
-OUTDIR=$2
-
-OUT_FILE=$(dirname $OUTDIR)/doxygen.out
-
-# run doxygen, capturing all the header files it processed
-doxygen "${DOXYCONF}" > $OUT_FILE
-echo "$OUTDIR: $(awk '/Preprocessing/ {printf("%s ", substr($2, 1, length($2) - 3))}' $OUT_FILE)" > $OUTDIR.d

doc/api/generate_examples.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# (c) 2018 Luca Boccassi <bluca@debian.org>
+# (c) 2022 Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
+
+import os, sys
+
+examples_dir, api_examples = sys.argv[1:]
+
+sources = []
+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:
+            is_source = name.endswith('.c')
+            if is_source or name == 'meson.build':
+                path = os.path.join(root, name)
+                if is_source:
+                    sources.append(path)
+                print(path , end=' ', file=dep)
+
+with open(api_examples, 'w') as out:
+    print('''/**
+@page examples DPDK Example Programs
+''', file=out)
+    for path in 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('\\', '/')
+        print(f'@example examples/{relpath}', file=out)
+    print('*/', file=out)

doc/api/generate_examples.sh

@@ -1,20 +0,0 @@
-#! /bin/sh -e
-# SPDX-License-Identifier: BSD-3-Clause
-# Copyright 2018 Luca Boccassi <bluca@debian.org>
-
-EXAMPLES_DIR=$1
-API_EXAMPLES=$2
-
-FIND=find
-
-# generate a .d file including both C files and also build files, so we can
-# detect both file changes and file additions/deletions
-echo "$API_EXAMPLES: $($FIND ${EXAMPLES_DIR} -type f \( -name '*.c' -o -name 'meson.build' \) | tr '\n' ' ' )" > ${API_EXAMPLES}.d
-
-exec > "${API_EXAMPLES}"
-printf '/**\n'
-printf '@page examples DPDK Example Programs\n\n'
-$FIND "${EXAMPLES_DIR}" -type f -name '*.c' |
-	sed "s|${EXAMPLES_DIR}|@example examples|" |
-	LC_ALL=C sort
-printf '*/\n'

doc/api/meson.build

@@ -11,8 +11,8 @@ endif
 # is in a subdirectory that is created at build time and thus it cannot
 # be an individual custom_target, we need to wrap the doxygen call in a
 # script to run the CSS modification afterwards
-generate_doxygen = find_program('generate_doxygen.sh')
-generate_examples = find_program('generate_examples.sh')
+generate_doxygen = py3 + files('generate_doxygen.py')
+generate_examples = py3 + files('generate_examples.py')
 
 htmldir = join_paths(get_option('datadir'), 'doc', 'dpdk')
 
@@ -51,7 +51,7 @@ doxy_build = custom_target('doxygen',
         input: doxy_conf,
         output: 'html',
         depfile: 'html.d',
-        command: [generate_doxygen, '@INPUT@', '@OUTPUT@'],
+        command: [generate_doxygen, '@OUTPUT@', doxygen, '@INPUT@'],
         install: get_option('enable_docs'),
         install_dir: htmldir,
         build_by_default: get_option('enable_docs'))