doc: Generate dev release notes

2 files changed, 69 insertions, 31 deletions

diff --git a/docs/genrelnotes.py b/docs/genrelnotes.py
index 082ab45..abad3cc 100755
--- a/docs/genrelnotes.py
+++ b/docs/genrelnotes.py
@@ -16,10 +16,11 @@
 '''
   Generates release notes for new releases of Meson build system
 '''
+import argparse
 import subprocess
-import sys
-import os
-from glob import glob
+import re
+import shutil
+from pathlib import Path
 
 RELNOTE_TEMPLATE = '''---
 title: Release {}
@@ -31,43 +32,65 @@ short-description: Release notes for {}
 '''
 
 
-def add_to_sitemap(from_version, to_version):
+def add_to_sitemap(sitemap, output_sitemap):
     '''
        Adds release note entry to sitemap.txt.
     '''
-    sitemapfile = '../sitemap.txt'
-    s_f = open(sitemapfile, encoding='utf-8')
-    lines = s_f.readlines()
-    s_f.close()
-    with open(sitemapfile, 'w', encoding='utf-8') as s_f:
+    sitemapfile = Path(sitemap)
+    with sitemapfile.open(encoding='utf-8') as s_f:
+        lines = s_f.readlines()
+    relnotes = None
+    to_version = None
+    output = Path(output_sitemap)
+    output.parent.mkdir(exist_ok=True, parents=True)
+    with output.open('w', encoding='utf-8') as s_f:
         for line in lines:
-            if 'Release-notes' in line and from_version in line:
-                new_line = line.replace(from_version, to_version)
-                s_f.write(new_line)
+            if relnotes is None:
+                m = re.match(r'[\s]*Release-notes-for-([0-9]+)\.([0-9]+)\.([0-9]+)\.md', line)
+                if m:
+                    from_version = f'{m[1]}.{m[2]}.{m[3]}'
+                    to_version = f'{m[1]}.{int(m[2]) + 1}.{m[3]}'
+                    new_line = line.replace(from_version, to_version)
+                    relnotes = new_line.strip()
+                    s_f.write(new_line)
             s_f.write(line)
 
-def generate(from_version, to_version):
+    if sitemapfile == output:
+        subprocess.check_call(['git', 'add', output])
+
+    return relnotes, to_version
+
+def generate(relnotes, to_version, source_dir, output_dir):
     '''
        Generate notes for Meson build next release.
     '''
-    ofilename = f'Release-notes-for-{to_version}.md'
-    with open(ofilename, 'w', encoding='utf-8') as ofile:
-        ofile.write(RELNOTE_TEMPLATE.format(to_version, to_version))
-        for snippetfile in glob('snippets/*.md'):
-            snippet = open(snippetfile, encoding='utf-8').read()
+    release = f'{to_version} (in development)' if output_dir else to_version
+    output = Path(output_dir, relnotes) if output_dir else Path('markdown', relnotes)
+    output.parent.mkdir(exist_ok=True, parents=True)
+    with output.open('w', encoding='utf-8') as ofile:
+        ofile.write(RELNOTE_TEMPLATE.format(release, to_version))
+        for snippetfile in Path(source_dir, 'markdown/snippets').glob('*.md'):
+            snippet = snippetfile.read_text(encoding='utf-8')
             ofile.write(snippet)
             if not snippet.endswith('\n'):
                 ofile.write('\n')
             ofile.write('\n')
-            subprocess.check_call(['git', 'rm', snippetfile])
-    subprocess.check_call(['git', 'add', ofilename])
-    add_to_sitemap(from_version, to_version)
+
+    if not output_dir:
+        subprocess.check_call(['git', 'rm', 'markdown/snippets/*.md'])
+        subprocess.check_call(['git', 'add', output])
 
 if __name__ == '__main__':
-    if len(sys.argv) != 3:
-        print(sys.argv[0], 'from_version to_version')
-        sys.exit(1)
-    FROM_VERSION = sys.argv[1]
-    TO_VERSION = sys.argv[2]
-    os.chdir('markdown')
-    generate(FROM_VERSION, TO_VERSION)
+    parser = argparse.ArgumentParser(description='Generate meson docs')
+    parser.add_argument('--input-sitemap', default='sitemap.txt')
+    parser.add_argument('--output-sitemap', default='sitemap.txt')
+    parser.add_argument('--source-dir', default='.')
+    parser.add_argument('--output-dir')
+
+    args = parser.parse_args()
+
+    if Path(args.source_dir, 'markdown/snippets').glob('*.md'):
+        relnotes, to_version = add_to_sitemap(args.input_sitemap, args.output_sitemap)
+        generate(relnotes, to_version, args.source_dir, args.output_dir)
+    elif args.input_sitemap != args.output_sitemap:
+        shutil.copyfile(args.input_sitemap, args.output_sitemap)
diff --git a/docs/meson.build b/docs/meson.build
index c486103..a14055c 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -15,10 +15,12 @@ docs_gen = custom_target(
     build_by_default: true,
     install: false)
 
+sitemap = files('sitemap.txt')
+
 genrefman = find_program('./genrefman.py')
 refman_binary = custom_target(
     'gen_refman_bin',
-    input: files('sitemap.txt'),
+    input: sitemap,
     output: 'reference_manual.bin',
     depfile: 'reman_dep.d',
     command: [
@@ -39,7 +41,7 @@ refman_md = custom_target(
         genrefman,
         '-l', 'pickle',
         '-g', 'md',
-        '-s', files('sitemap.txt'),
+        '-s', sitemap,
         '-i', '@INPUT@',
         '-o', '@OUTPUT0@',
         '--link-defs', '@OUTPUT1@',
@@ -47,6 +49,7 @@ refman_md = custom_target(
         '--no-modules',
     ],
 )
+sitemap = refman_md[0]
 
 refman_json = custom_target(
     'gen_refman_json',
@@ -79,6 +82,18 @@ refman_man = custom_target(
     ],
 )
 
+genrelnotes = custom_target(
+    output: ['sitemap-genrelnotes.txt'],
+    build_always_stale: true,
+    command: [find_program('genrelnotes.py'),
+        '--input-sitemap', sitemap,
+        '--output-sitemap', '@OUTPUT0@',
+        '--output-dir', meson.current_build_dir(),
+        '--source-dir', meson.current_source_dir(),
+    ]
+)
+sitemap = genrelnotes[0]
+
 test('validate_docs', find_program('./jsonvalidator.py'), args: [refman_json])
 
 hotdoc_prog = find_program('hotdoc', version: '>=0.13.7')
@@ -86,7 +101,7 @@ hotdoc_prog = find_program('hotdoc', version: '>=0.13.7')
 hotdoc = import('hotdoc')
 documentation = hotdoc.generate_doc(meson.project_name(),
     project_version: meson.project_version(),
-    sitemap: refman_md[0],
+    sitemap: sitemap,
     build_by_default: true,
     depends: docs_gen,
     index: 'markdown/index.md',