Merge branch 'ps/meson-build-docs'

The build procedure based on meson learned a target to only build
documentation, similar to "make doc".

* ps/meson-build-docs:
  ci: don't compile whole project when testing docs with Meson
  meson: print docs backend as part of the summary
  meson: introduce a "docs" alias to compile documentation only

Author: gitster

Documentation/howto/meson.build

@@ -29,7 +29,7 @@ howto_index = custom_target(
   output: 'howto-index.adoc',
 )
 
-custom_target(
+doc_targets += custom_target(
   command: asciidoc_html_options,
   input: howto_index,
   output: 'howto-index.html',
@@ -51,7 +51,7 @@ foreach howto : howto_sources
     capture: true,
   )
 
-  custom_target(
+  doc_targets += custom_target(
     command: asciidoc_html_options,
     input: howto_stripped,
     output: fs.stem(howto_stripped.full_path()) + '.html',

Documentation/meson.build

@@ -377,7 +377,7 @@ foreach manpage, category : manpages
       output: fs.stem(manpage) + '.xml',
     )
 
-    custom_target(
+    doc_targets += custom_target(
       command: [
         xmlto,
         '-m', '@INPUT0@',
@@ -400,7 +400,7 @@ foreach manpage, category : manpages
   endif
 
   if get_option('docs').contains('html')
-    custom_target(
+    doc_targets += custom_target(
       command: asciidoc_common_options + [
         '--backend=' + asciidoc_html,
         '--doctype=manpage',
@@ -452,7 +452,7 @@ if get_option('docs').contains('html')
     depends: documentation_deps,
   )
 
-  custom_target(
+  doc_targets += custom_target(
     command: [
       xsltproc,
       '--xinclude',
@@ -481,7 +481,7 @@ if get_option('docs').contains('html')
   ]
 
   foreach article : articles
-    custom_target(
+    doc_targets += custom_target(
       command: asciidoc_common_options + [
         '--backend=' + asciidoc_html,
         '--out-file=@OUTPUT@',

Documentation/technical/meson.build

@@ -46,7 +46,7 @@ api_index = custom_target(
   output: 'api-index.adoc',
 )
 
-custom_target(
+doc_targets += custom_target(
   command: asciidoc_html_options,
   input: api_index,
   output: 'api-index.html',
@@ -56,7 +56,7 @@ custom_target(
 )
 
 foreach article : api_docs + articles
-  custom_target(
+  doc_targets += custom_target(
     command: asciidoc_html_options,
     input: article,
     output: fs.stem(article) + '.html',

ci/test-documentation.sh

@@ -48,13 +48,13 @@ check_unignored_build_artifacts
 
 # Build docs with Meson and AsciiDoc
 meson setup build-asciidoc -Ddocs=html,man -Ddocs_backend=asciidoc
-meson compile -C build-asciidoc
+meson compile -C build-asciidoc docs
 check_docs build-asciidoc AsciiDoc
 rm -rf build-asciidoc
 
 # Build docs with Meson and AsciiDoctor
 meson setup build-asciidoctor -Ddocs=html,man -Ddocs_backend=asciidoctor
-meson compile -C build-asciidoctor
+meson compile -C build-asciidoctor docs
 check_docs build-asciidoctor Asciidoctor
 rm -rf build-asciidoctor
 

contrib/contacts/meson.build

@@ -20,7 +20,7 @@ if get_option('docs').contains('man')
     output: 'git-contacts.xml',
   )
 
-  custom_target(
+  doc_targets += custom_target(
     command: [
       xmlto,
       '-m', '@INPUT@',
@@ -39,7 +39,7 @@ if get_option('docs').contains('man')
 endif
 
 if get_option('docs').contains('html')
-  custom_target(
+  doc_targets += custom_target(
     command: asciidoc_common_options + [
       '--backend=' + asciidoc_html,
       '--doctype=manpage',

contrib/subtree/meson.build

@@ -38,7 +38,7 @@ if get_option('docs').contains('man')
     output: 'git-subtree.xml',
   )
 
-  custom_target(
+  doc_targets += custom_target(
     command: [
       xmlto,
       '-m', '@INPUT@',
@@ -57,7 +57,7 @@ if get_option('docs').contains('man')
 endif
 
 if get_option('docs').contains('html')
-  custom_target(
+  doc_targets += custom_target(
     command: asciidoc_common_options + [
       '--backend=' + asciidoc_html,
       '--doctype=manpage',

meson.build

@@ -2101,11 +2101,20 @@ endif
 
 subdir('bin-wrappers')
 if get_option('docs') != []
+  doc_targets = []
   subdir('Documentation')
+else
+  docs_backend = 'none'
 endif
 
 subdir('contrib')
 
+# Note that the target is intentionally configured after including the
+# 'contrib' directory, as some tool there also have their own manpages.
+if get_option('docs') != []
+  alias_target('docs', doc_targets)
+endif
+
 exclude_from_check_headers = [
   'compat/',
   'unicode-width.h',
@@ -2244,6 +2253,7 @@ summary({
 
 summary({
   'csprng': csprng_backend,
+  'docs': docs_backend,
   'https': https_backend,
   'sha1': sha1_backend,
   'sha1_unsafe': sha1_unsafe_backend,