doc: make pandoc optional (#2866)
Since it's currently unavailable on RHEL 9.
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Kleis Auke Wolthuizen
GitHub
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="Cite.md">
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<refentry id="Cite">
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<para>
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="Examples.md">
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<refentry id="Examples">
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<para>
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="How-it-opens-files.md">
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<refentry id="How-it-opens-files">
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<para>
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="How-it-works.md">
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<refentry id="How-it-works">
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<para>
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@ -55,7 +55,7 @@ VipsPel *pixel = VIPS_REGION_ADDR( region, x, y );
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g_object_unref( region );
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</programlisting>
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<para>
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The action that <literal>vips_region_prepare()</literal> takes varies with the type of image. If the image is a file on disc, for example, then VIPS will arrange for a refsect3 of the file to be read in.
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The action that <literal>vips_region_prepare()</literal> takes varies with the type of image. If the image is a file on disc, for example, then VIPS will arrange for a section of the file to be read in.
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</para>
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<para>
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(* there is an image access mode where you can just use a pointer, but it’s rarely used)
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@ -136,7 +136,7 @@ g_object_unref( region );
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<emphasis role="strong">Data sources</emphasis>
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</para>
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<para>
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VIPS has data sources which can supply pixels for processing from a variety of sources. VIPS can stream images from files in VIPS native format, from tiled TIFF files, from binary PPM/PGM/PBM/PFM, from Radiance (HDR) files, from FITS images and from tiled OpenEXR images. VIPS will automatically unpack other formats to temporary disc files for you but this can obviously generate a lot of disc traffic. It also has a special sequential mode for streaming operations on non-random-access formats. Another refsect3 in these docs explains <ulink url="How-it-opens-files.md.html">how libvips opens a file</ulink>. One of the sources uses the <ulink
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VIPS has data sources which can supply pixels for processing from a variety of sources. VIPS can stream images from files in VIPS native format, from tiled TIFF files, from binary PPM/PGM/PBM/PFM, from Radiance (HDR) files, from FITS images and from tiled OpenEXR images. VIPS will automatically unpack other formats to temporary disc files for you but this can obviously generate a lot of disc traffic. It also has a special sequential mode for streaming operations on non-random-access formats. Another section in these docs explains <ulink url="How-it-opens-files.md.html">how libvips opens a file</ulink>. One of the sources uses the <ulink
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url="http://www.imagemagick.org">ImageMagick</ulink> (or optionally <ulink
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url="http://www.graphicsmagick.org">GraphicsMagick</ulink> library, so VIPS can read any image format that these libraries can read.
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</para>
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@ -127,7 +127,7 @@ HTML_IMAGES = \
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# pandoc makes section headers, we want refsect3 for gtk-doc
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.md.xml:
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pandoc -s --template="$(realpath pandoc-docbook-template.docbook)" --wrap=none -V title="$<" -f markdown+smart -t docbook -o $@ $<
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sed -e s/section/refsect3/g < $@ > x.$@ && mv x.$@ $@
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sed -i -e 's|<section|<refsect3|g' -e 's|</section|</refsect3|g' $@
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# Our markdown source files
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markdown_content_files = \
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="Making-image-pyramids.md">
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<refentry id="Making-image-pyramids">
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<para>
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@ -66,7 +66,7 @@ operation flags: sequential nocache
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You can also call <literal>vips_dzsave()</literal> from any language with a libvips binding, or by using <literal>.dz</literal> or <literal>.szi</literal> as an output file suffix.
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</para>
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<refsect3 xml:id="writing-deepzoom-pyramids">
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<title>Writing <link xlink:href="http://en.wikipedia.org/wiki/Deep_Zoom">DeepZoom</link> pyramids</title>
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<title>Writing DeepZoom pyramids</title>
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<para>
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The <literal>--layout</literal> option sets the basic mode of operation. With no <literal>--layout</literal>, dzsave writes DeepZoom pyramids. For example:
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</para>
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@ -102,7 +102,7 @@ $ vips dzsave huge.tif myzoom --layout zoomify
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</para>
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</refsect3>
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<refsect3 xml:id="writing-google-maps-pyramids">
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<title>Writing <link xlink:href="https://developers.google.com/maps/">Google Maps</link> pyramids</title>
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<title>Writing Google Maps pyramids</title>
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<para>
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Use <literal>--layout google</literal> to write Google maps-style pyramids. These are compatible with <ulink url="http://leafletjs.com">Leaflet</ulink>. For example:
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</para>
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="Using-vipsthumbnail.md">
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<refentry id="Using-vipsthumbnail">
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<para>
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@ -56,7 +56,7 @@ $ cat k2.jpg | \
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$ vipsthumbnail *.jpg
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</programlisting>
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<para>
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will make a thumbnail for every jpeg in the current directory. See the <link linkend="output-directory">Output directory</link> refsect3 below to see how to change where thumbnails are written.
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will make a thumbnail for every jpeg in the current directory. See the <link linkend="output-directory">Output directory</link> section below to see how to change where thumbnails are written.
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</para>
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<para>
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<literal>vipsthumbnail</literal> will process images one after the other. You can get a good speedup by running several <literal>vipsthumbnail</literal>s in parallel, depending on how much load you want to put on your system. For example:
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@ -169,7 +169,7 @@ the method-missing hook and attempt to run any method calls not implemented by
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the `Image` class as libvips operators. In effect, the binding is generated at
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runtime.
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# Dynamic langauge without FFI
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# Dynamic language without FFI
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PHP does not have a useful FFI, unfortunately, so for this language a small
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C module implements the general `vips_call()` function for PHP language
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@ -1,7 +1,7 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="binding.md">
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<refentry id="binding">
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<para>
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@ -173,8 +173,8 @@ VImage VImage::invert( VOption *options )
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Since these languages are dynamic, they can add another trick: they intercept the method-missing hook and attempt to run any method calls not implemented by the <literal>Image</literal> class as libvips operators. In effect, the binding is generated at runtime.
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</para>
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</refsect3>
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<refsect3 xml:id="dynamic-langauge-without-ffi">
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<title>Dynamic langauge without FFI</title>
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<refsect3 xml:id="dynamic-language-without-ffi">
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<title>Dynamic language without FFI</title>
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<para>
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PHP does not have a useful FFI, unfortunately, so for this language a small C module implements the general <literal>vips_call()</literal> function for PHP language types, and a larger pure PHP layer makes it convenient to use.
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</para>
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry id="libvips-from-C++.md">
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<refentry id="libvips-from-C++">
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<para>
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@ -67,25 +67,45 @@ markdown_content_files = files(
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'Making-image-pyramids.md',
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)
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markdown_content_files_docbook = []
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foreach markdown_content_file : markdown_content_files
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pandoc = find_program('pandoc', required: false)
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if pandoc.found()
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# we have some files in markdown ... convert to docbook for gtk-doc
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# pandoc makes section headers, we want refsect3 for gtk-doc
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markdown_content_files_docbook += configure_file(
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input: markdown_content_file,
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command: [
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find_program('pandoc'),
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gen = generator(pandoc,
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output: '@BASENAME@.xml',
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arguments: [
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'@INPUT@',
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'--template', files('pandoc-docbook-template.docbook'),
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'--template=@0@'.format(join_paths(meson.current_source_dir(), 'pandoc-docbook-template.docbook')),
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'--wrap=none',
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'-V', 'title=@BASENAME@',
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'-f', 'markdown+smart',
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'-t', 'docbook',
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'-o', '@OUTPUT@',
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],
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output: '@BASENAME@.xml',
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]
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)
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endforeach
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markdown_content_files_generated = gen.process(markdown_content_files)
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# pandoc makes section headers, we want refsect3 for gtk-doc
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markdown_content_files_docbook = custom_target('gen-docs',
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output: 'generated',
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input: markdown_content_files_generated,
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command: [ 'sed', '-i', '-e', 's|<section|<refsect3|g', '-e', 's|</section|</refsect3|g', '@INPUT@' ],
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build_by_default: true
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)
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else
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# use the pre-generated docbook files when pandoc is not available
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markdown_content_files_docbook = files(
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'How-it-works.xml',
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'libvips-from-C++.xml',
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'Using-vipsthumbnail.xml',
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'How-it-opens-files.xml',
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'Examples.xml',
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'Cite.xml',
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'binding.xml',
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'Making-image-pyramids.xml',
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)
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endif
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content_files = files(
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'using-command-line.xml',
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@ -135,7 +155,7 @@ gnome.gtkdoc('libvips',
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'--extra-dir=@0@'.format(join_paths(glib_docpath, 'gio')),
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],
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content_files: [ content_files, markdown_content_files_docbook ],
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expand_content_files: [ content_files, markdown_content_files_docbook ],
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expand_content_files: [ content_files ],
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html_assets: images,
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install: true
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)
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