[dia: 31/105] #19: s/DBMAN/DB2MAN/ and only call xsltproc and dblatex if found.

[Zander <zbrown src gnome org>]

commit 3cbcd19f40bd30fac38ffd21a9c7a2c4e15d32df
Author: Eduard Nicodei <eddnicodei gmail com>
Date:   Tue Dec 25 22:08:33 2018 +0000

    #19: s/DBMAN/DB2MAN/ and only call xsltproc and dblatex if found.
    
      - This reduces the number of _required_ dependencies.

 doc/en/meson.build | 62 +++++++++++++++++++++++++++++++++++++++++-------------
 doc/meson.build    |  3 ++-
 2 files changed, 49 insertions(+), 16 deletions(-)
---
diff --git a/doc/en/meson.build b/doc/en/meson.build
index bb9f7372..836f3077 100644
--- a/doc/en/meson.build
+++ b/doc/en/meson.build
@@ -1,17 +1,49 @@
-# TODO: we need to generate dependecies for dia.xml.
-doc_pdf = custom_target('dia.pdf',
-    output : 'dia.pdf',
-    input  : 'dia.xml',
-    command : [dblatex, '-t', 'pdf', '-q', '-o', '@OUTPUT@', '@INPUT@'],
-    install : true,
-    install_dir : 'doc'
+docdir = join_paths(
+    get_option('datadir'),
+    'doc',
+    meson.project_name()
 )
 
-xsltproc = find_program('xsltproc')
-manpage = custom_target('dia.1',
-    output : 'dia.1',
-    input  : 'dia.dbk',
-    command : [xsltproc, '--novalid', '--output', '@OUTPUT@', DBMAN, '@INPUT@'],
-    install : true,
-    install_dir : 'doc'
-)
+dia_xml_deps = [
+    'authors.xml',
+    'custom-shapes.xml',
+    'dia-1.xml',
+    'dia-cmdline.xml',
+    'dia.xml',
+    'entities.xml',
+    'intro.xml',
+    'license.xml',
+    'usage-canvas.xml',
+    'usage-customization.xml',
+    'usage-layers.xml',
+    'usage-loadsave.xml',
+    'usage-objects-basic.xml',
+    'usage-objects-selecting.xml',
+    'usage-objects-special.xml',
+    'usage-objects.xml',
+    'usage-quickstart.xml',
+]
+
+if dblatex.found()
+    custom_target('dia.pdf',
+        output : 'dia.pdf',
+        input  : 'dia.xml',
+        depend_files : dia_xml_deps,
+        command : [dblatex, '-t', 'pdf', '-q', '-o', '@OUTPUT@', '@INPUT@'],
+        install : true,
+        install_dir : docdir
+    )
+endif
+
+if xsltproc.found()
+    dia_man = custom_target('dia.1',
+        output : 'dia.1',
+        input  : 'dia.dbk',
+        command : [xsltproc, '--novalid', '--output', '@OUTPUT@', DB2MAN, '@INPUT@'],
+        install : true,
+        install_dir : join_paths(get_option('mandir'), 'man1')
+    )
+    # XXX: this should fixed in meson: https://github.com/mesonbuild/meson/issues/1550
+    #install_data(dia_man)
+
+endif
diff --git a/doc/meson.build b/doc/meson.build
index d2062cf1..9a701080 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -1,6 +1,7 @@
 dblatex = find_program('dblatex')
+xsltproc = find_program('xsltproc')
 
-DBMAN = 'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl'
+DB2MAN = 'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl'
 
 subdir('en')