[gimp] devel-docs: generate both gjs (Javascript) and Python API docs.

[Jehan <jehanp src gnome org>]

commit 72af40b42704b64b2b5219e0c5ae4ea7c74fa84a
Author: Jehan <jehan girinstud io>
Date:   Fri Jan 29 18:04:20 2021 +0100

    devel-docs: generate both gjs (Javascript) and Python API docs.
    
    Apparently g-ir-doc-tool does not support other language than C, Python
    and gjs right now (in particular neither Lua nor Vala bindings).

 devel-docs/g-ir-docs/Makefile.am |  45 +++++----
 devel-docs/g-ir-docs/meson.build | 204 ++++++++++++++++++++-------------------
 2 files changed, 126 insertions(+), 123 deletions(-)
---
diff --git a/devel-docs/g-ir-docs/Makefile.am b/devel-docs/g-ir-docs/Makefile.am
index 467947e946..1e29a4c65c 100644
--- a/devel-docs/g-ir-docs/Makefile.am
+++ b/devel-docs/g-ir-docs/Makefile.am
@@ -1,34 +1,33 @@
 if ENABLE_G_IR_DOC
 
-Gimp-pythondocs: $(top_builddir)/libgimp/Gimp-@GIMP_API_VERSION@.gir
+Gimp-%-docs: $(top_builddir)/libgimp/Gimp-@GIMP_API_VERSION@.gir
        $(GIR_DOC_TOOL) -I "$(prefix)/share/gir-1.0/"                   \
-               -I "$(top_builddir)/libgimp" --language=Python          \
-               -o "$(builddir)/pages/Python/Gimp-$(GIMP_API_VERSION)"  \
-               $^
+               -I "$(top_builddir)/libgimp" --language=$*              \
+               -o "$(builddir)/pages/$*/Gimp-$(GIMP_API_VERSION)"      \
+               $<
        $(YELP_BUILD) cache                                                             \
-               -o "$(builddir)/pages/Python/Gimp-$(GIMP_API_VERSION)/index.cache"      \
-               "$(builddir)/pages/Python/Gimp-$(GIMP_API_VERSION)/"
-       mkdir -p "$(builddir)/html/Python/Gimp-$(GIMP_API_VERSION)"
+               -o "$(builddir)/pages/$*/Gimp-$(GIMP_API_VERSION)/index.cache"  \
+               "$(builddir)/pages/$*/Gimp-$(GIMP_API_VERSION)/"
+       mkdir -p "$(builddir)/html/$*/Gimp-$(GIMP_API_VERSION)"
        $(YELP_BUILD) html                                              \
-               -o "$(builddir)/html/Python/Gimp-$(GIMP_API_VERSION)"   \
-               "$(builddir)/pages/Python/Gimp-$(GIMP_API_VERSION)/"
-       echo "Python Gimp module documentation: $(builddir)/html/Python/Gimp-$(GIMP_API_VERSION)"
+               -o "$(builddir)/html/$*/Gimp-$(GIMP_API_VERSION)"       \
+               "$(builddir)/pages/$*/Gimp-$(GIMP_API_VERSION)/"
+       echo "$* Gimp module documentation: $(builddir)/html/Python/Gimp-$(GIMP_API_VERSION)"
 
-GimpUi-pythondocs: $(top_builddir)/libgimp/GimpUi-@GIMP_API_VERSION@.gir
-       $(GIR_DOC_TOOL) -I "$(prefix)/share/gir-1.0/"                           \
-               -I "$(top_builddir)/libgimp" --language=Python                  \
-               -o "$(builddir)/pages/Python/GimpUi-$(GIMP_API_VERSION)"        \
-               $^
+GimpUi-%-docs: $(top_builddir)/libgimp/GimpUi-@GIMP_API_VERSION@.gir Gimp-%-docs
+       $(GIR_DOC_TOOL) -I "$(prefix)/share/gir-1.0/"                   \
+               -I "$(top_builddir)/libgimp" --language=$*              \
+               -o "$(builddir)/pages/$*/GimpUi-$(GIMP_API_VERSION)"    \
+               $<
        $(YELP_BUILD) cache                                                             \
-               -o "$(builddir)/pages/Python/GimpUi-$(GIMP_API_VERSION)/index.cache"    \
-               "$(builddir)/pages/Python/GimpUi-$(GIMP_API_VERSION)/"
-       mkdir -p "$(builddir)/html/Python/GimpUi-$(GIMP_API_VERSION)"
+               -o "$(builddir)/pages/$*/GimpUi-$(GIMP_API_VERSION)/index.cache"        \
+               "$(builddir)/pages/$*/GimpUi-$(GIMP_API_VERSION)/"
+       mkdir -p "$(builddir)/html/$*/GimpUi-$(GIMP_API_VERSION)"
        $(YELP_BUILD) html                                              \
-               -o "$(builddir)/html/Python/GimpUi-$(GIMP_API_VERSION)" \
-               "$(builddir)/pages/Python/GimpUi-$(GIMP_API_VERSION)/"
-       echo "Python GimpUi module documentation: $(builddir)/html/Python/Gimp-$(GIMP_API_VERSION)"
+               -o "$(builddir)/html/$*/GimpUi-$(GIMP_API_VERSION)"     \
+               "$(builddir)/pages/$*/GimpUi-$(GIMP_API_VERSION)/"
+       echo "$* GimpUi module documentation: $(builddir)/html/Python/GimpUi-$(GIMP_API_VERSION)"
 
-.PHONY: Gimp-pythondocs GimpUi-pythondocs
-all-local: Gimp-pythondocs GimpUi-pythondocs
+all-local: GimpUi-gjs-docs GimpUi-python-docs
 
 endif
diff --git a/devel-docs/g-ir-docs/meson.build b/devel-docs/g-ir-docs/meson.build
index b84553b682..3554b66c8b 100644
--- a/devel-docs/g-ir-docs/meson.build
+++ b/devel-docs/g-ir-docs/meson.build
@@ -1,110 +1,114 @@
-# XXX meson does not allow building into subdir:
-# https://github.com/mesonbuild/meson/issues/2320
-# Otherwise I could use '-o', '@OUTDIR@' into following commands if
-# the `output` was subdir-able.
-gir_docs_dir = custom_target('g-ir-docs-dir',
-  depends: [ libgimp_gir, libgimpui_gir ],
-  input: [ ],
-  output: [ 'html-dirs' ],
-  command: [
-    'mkdir', '-p',
-    '@OUTDIR@' + '/pages/Python/GimpUi-' + gimp_api_version,
-    '@OUTDIR@' + '/pages/Python/Gimp-' + gimp_api_version,
-    '@OUTDIR@' + '/html/Python/GimpUi-' + gimp_api_version,
-    '@OUTDIR@' + '/html/Python/Gimp-' + gimp_api_version
-  ],
-  build_by_default: true)
+foreach lang : [ 'python', 'gjs' ]
 
-# XXX `output` is bogus. g-ir-doc-tool produces a lot of output,
-# basically one page per public symbol, which is more than 1000 so
-# it's not usable. Since custom_target() requires an 'output', I could
-# just set one output such as 'index.page` as a trick, but since we
-# have another issue on subdir anyway (cf. above), I use some bogus
-# file instead. The fact the bogus file is not even created does not
-# even seem to be a problem for meson.
-# Moreover I realized that the targets listed by ninja are only the
-# output files (not the target name), so I basically ends up using
-# this field to create understandable names).
-gir_docs_python = custom_target('g-ir-Gimp-python-pages',
-  depends: [ gir_docs_dir, libgimp_gir ],
-  input: [ libgimp_gir[0] ],
-  output: [ 'Gimp-python-pages' ],
-  command: [
-    gir_doc_tool,
-    '-I', prefix / 'share/gir-1.0/',
-    '-I', meson.build_root() / 'libgimp',
-    '--language=Python',
-    '-o', '@OUTDIR@' + '/pages/Python/Gimp-' + gimp_api_version,
-    '@INPUT@'
-  ],
-  build_by_default: true)
+  # XXX meson does not allow building into subdir:
+  # https://github.com/mesonbuild/meson/issues/2320
+  # Otherwise I could use '-o', '@OUTDIR@' into following commands if
+  # the `output` was subdir-able.
+  gir_docs_dir = custom_target('g-ir-docs-' + lang + '-dir',
+    depends: [ libgimp_gir, libgimpui_gir ],
+    input: [ ],
+    output: [ 'gir-' + lang + '-dirs' ],
+    command: [
+      'mkdir', '-p',
+      '@OUTDIR@' + '/pages/' + lang + '/GimpUi-' + gimp_api_version,
+      '@OUTDIR@' + '/pages/' + lang + '/Gimp-' + gimp_api_version,
+      '@OUTDIR@' + '/html/' + lang + '/GimpUi-' + gimp_api_version,
+      '@OUTDIR@' + '/html/' + lang + '/Gimp-' + gimp_api_version
+    ],
+    build_by_default: true)
 
-## Gimp Module ##
+  # XXX `output` is bogus. g-ir-doc-tool produces a lot of output,
+  # basically one page per public symbol, which is more than 1000 so
+  # it's not usable. Since custom_target() requires an 'output', I could
+  # just set one output such as 'index.page` as a trick, but since we
+  # have another issue on subdir anyway (cf. above), I use some bogus
+  # file instead. The fact the bogus file is not even created does not
+  # even seem to be a problem for meson.
+  # Moreover I realized that the targets listed by ninja are only the
+  # output files (not the target name), so I basically ends up using
+  # this field to create understandable names).
+  gir_docs_pages = custom_target('g-ir-Gimp-' + lang + '-pages',
+    depends: [ gir_docs_dir, libgimp_gir ],
+    input: [ libgimp_gir[0] ],
+    output: [ 'Gimp-' + lang + '-pages' ],
+    command: [
+      gir_doc_tool,
+      '-I', prefix / 'share/gir-1.0/',
+      '-I', meson.build_root() / 'libgimp',
+      '--language=' + lang,
+      '-o', '@OUTDIR@' + '/pages/' + lang + '/Gimp-' + gimp_api_version,
+      '@INPUT@'
+    ],
+    build_by_default: true)
 
-gir_cache_python = custom_target('g-ir-Gimp-python-cache',
-  input: [ gir_docs_python ],
-  output: [ 'Gimp-python-cache' ],
-  command: [
-    yelp_build, 'cache',
-    '-o', '@OUTDIR@' + '/pages/Python/Gimp-' + gimp_api_version + '/index.cache',
-    '@OUTDIR@' + '/pages/Python/Gimp-' + gimp_api_version,
-  ],
-  build_by_default: true)
+  ## Gimp Module ##
 
-gir_html_python = custom_target('g-ir-Gimp-python-html',
-  input: [ gir_cache_python ],
-  output: [ 'Gimp-python-html' ],
-  # TODO: `output` needs to be complete for installation to work. So
-  # we need to figure out how to install the generated files (listing
-  # all of them is a crazy idea, but maybe we can generate the
-  # expected list somehow? Maybe even using the .def file which is
-  # already an exhaustive listing would be a good idea?
-  # Also where should we install exactly?
-  #install_dir: prefix / gimpdatadir / 'g-ir-docs/html/Python/Gimp',
-  #install: true,
-  command: [
-    'yelp-build', 'html',
-    '-o', '@OUTDIR@' + '/html/Python/Gimp-' + gimp_api_version,
-    '@OUTDIR@' + '/pages/Python/Gimp-' + gimp_api_version,
-  ],
-  build_by_default: true)
+  gir_docs_cache = custom_target('g-ir-Gimp-' + lang + '-cache',
+    input: [ gir_docs_pages ],
+    output: [ 'Gimp-' + lang + '-cache' ],
+    command: [
+      yelp_build, 'cache',
+      '-o', '@OUTDIR@' + '/pages/' + lang + '/Gimp-' + gimp_api_version + '/index.cache',
+      '@OUTDIR@' + '/pages/' + lang + '/Gimp-' + gimp_api_version,
+    ],
+    build_by_default: true)
 
-## GimpUi module ##
+  gir_docs_html = custom_target('g-ir-Gimp-' + lang + '-html',
+    input: [ gir_docs_cache ],
+    output: [ 'Gimp-' + lang + '-html' ],
+    # TODO: `output` needs to be complete for installation to work. So
+    # we need to figure out how to install the generated files (listing
+    # all of them is a crazy idea, but maybe we can generate the
+    # expected list somehow? Maybe even using the .def file which is
+    # already an exhaustive listing would be a good idea?
+    # Also where should we install exactly?
+    #install_dir: prefix / gimpdatadir / 'g-ir-docs/html/' + lang + '/Gimp',
+    #install: true,
+    command: [
+      'yelp-build', 'html',
+      '-o', '@OUTDIR@' + '/html/' + lang + '/Gimp-' + gimp_api_version,
+      '@OUTDIR@' + '/pages/' + lang + '/Gimp-' + gimp_api_version,
+    ],
+    build_by_default: true)
 
-gir_docs_python = custom_target('g-ir-GimpUi-python-pages',
-  depends: [ gir_docs_dir, libgimpui_gir ],
-  input: [ libgimpui_gir[0] ],
-  output: [ 'GimpUi-python-pages' ],
-  command: [
-    gir_doc_tool,
-    '-I', prefix / 'share/gir-1.0/',
-    '-I', meson.build_root() / 'libgimp',
-    '--language=Python',
-    '-o', '@OUTDIR@' + '/pages/Python/GimpUi-' + gimp_api_version,
-    '@INPUT@'
-  ],
-  build_by_default: true)
+  ## GimpUi module ##
 
-gir_cache_python = custom_target('g-ir-GimpUi-python-cache',
-  input: [ gir_docs_python ],
-  output: [ 'GimpUi-python-cache' ],
-  command: [
-    yelp_build, 'cache',
-    '-o', '@OUTDIR@' + '/pages/Python/GimpUi-' + gimp_api_version + '/index.cache',
-    '@OUTDIR@' + '/pages/Python/GimpUi-' + gimp_api_version,
-  ],
-  build_by_default: true)
+  gir_ui_docs_pages = custom_target('g-ir-GimpUi-' + lang + '-pages',
+    depends: [ gir_docs_dir, libgimpui_gir ],
+    input: [ libgimpui_gir[0] ],
+    output: [ 'GimpUi-' + lang + '-pages' ],
+    command: [
+      gir_doc_tool,
+      '-I', prefix / 'share/gir-1.0/',
+      '-I', meson.build_root() / 'libgimp',
+      '--language=' + lang,
+      '-o', '@OUTDIR@' + '/pages/' + lang + '/GimpUi-' + gimp_api_version,
+      '@INPUT@'
+    ],
+    build_by_default: true)
 
-gir_html_python = custom_target('g-ir-GimpUi-python-html',
-  input: [ gir_cache_python ],
-  output: [ 'GimpUi-python-html' ],
-  #install_dir: prefix / gimpdatadir / 'g-ir-docs/html/Python/GimpUi',
-  #install: true,
-  command: [
-    'yelp-build', 'html',
-    '-o', '@OUTDIR@' + '/html/Python/GimpUi-' + gimp_api_version,
-    '@OUTDIR@' + '/pages/Python/GimpUi-' + gimp_api_version,
-  ],
-  build_by_default: true)
+  gir_ui_docs_cache = custom_target('g-ir-GimpUi-' + lang + '-cache',
+    input: [ gir_ui_docs_pages ],
+    output: [ 'GimpUi-' + lang + '-cache' ],
+    command: [
+      yelp_build, 'cache',
+      '-o', '@OUTDIR@' + '/pages/' + lang + '/GimpUi-' + gimp_api_version + '/index.cache',
+      '@OUTDIR@' + '/pages/' + lang + '/GimpUi-' + gimp_api_version,
+    ],
+    build_by_default: true)
+
+  gir_ui_docs_html = custom_target('g-ir-GimpUi-' + lang + '-html',
+    input: [ gir_ui_docs_cache ],
+    output: [ 'GimpUi-' + lang + '-html' ],
+    #install_dir: prefix / gimpdatadir / 'g-ir-docs/html/' + lang + '/GimpUi',
+    #install: true,
+    command: [
+      'yelp-build', 'html',
+      '-o', '@OUTDIR@' + '/html/' + lang + '/GimpUi-' + gimp_api_version,
+      '@OUTDIR@' + '/pages/' + lang + '/GimpUi-' + gimp_api_version,
+    ],
+    build_by_default: true)
+
+endforeach
 
 ## TODO: a unit test using yelp-check would be useful.