Support multiple install dirs for built/custom targets

You can now pass a list of strings to the install_dir: kwarg to
build_target and custom_target.

Custom Targets:
===============
Allows you to specify the installation directory for each
corresponding output. For example:

    custom_target('different-install-dirs',
      output : ['first.file', 'second.file'],
      ...
      install : true,
      install_dir : ['somedir', 'otherdir])

This would install first.file to somedir and second.file to otherdir.

If only one install_dir is provided, all outputs are installed there
(same behaviour as before).

To only install some outputs, pass `false` for the outputs that you
don't want installed. For example:

    custom_target('only-install-second',
      output : ['first.file', 'second.file'],
      ...
      install : true,
      install_dir : [false, 'otherdir])

This would install second.file to otherdir and not install first.file.

Build Targets:
==============
With build_target() (which includes executable(), library(), etc),
usually there is only one primary output. However some types of
targets have multiple outputs.

For example, while generating Vala libraries, valac also generates
a header and a .vapi file both of which often need to be installed.
This allows you to specify installation directories for those too.

    # This will only install the library (same as before)
    shared_library('somevalalib', 'somesource.vala',
      ...
      install : true)

    # This will install the library, the header, and the vapi into the
    # respective directories
    shared_library('somevalalib', 'somesource.vala',
      ...
      install : true,
      install_dir : ['libdir', 'incdir', 'vapidir'])

    # This will install the library into the default libdir and
    # everything else into the specified directories
    shared_library('somevalalib', 'somesource.vala',
      ...
      install : true,
      install_dir : [true, 'incdir', 'vapidir'])

    # This will NOT install the library, and will install everything
    # else into the specified directories
    shared_library('somevalalib', 'somesource.vala',
      ...
      install : true,
      install_dir : [false, 'incdir', 'vapidir'])

true/false can also be used for secondary outputs in the same way.

Valac can also generate a GIR file for libraries when the `vala_gir:`
keyword argument is passed to library(). In that case, `install_dir:`
must be given a list with four elements, one for each output.

Includes tests for all these.

Closes https://github.com/mesonbuild/meson/issues/705
Closes https://github.com/mesonbuild/meson/issues/891
Closes https://github.com/mesonbuild/meson/issues/892
Closes https://github.com/mesonbuild/meson/issues/1178
Closes https://github.com/mesonbuild/meson/issues/1193

1 files changed, 2 insertions, 2 deletions

diff --git a/mesonbuild/modules/gnome.py b/mesonbuild/modules/gnome.py
index 4b366bf..2f5bfb9 100644
--- a/mesonbuild/modules/gnome.py
+++ b/mesonbuild/modules/gnome.py
@@ -999,7 +999,7 @@ class GnomeModule(ExtensionModule):
                                           target.get_subdir())
                     outdir = os.path.join(state.environment.get_build_dir(),
                                           target.get_subdir())
-                    outfile = target.output[0][:-5] # Strip .vapi
+                    outfile = target.get_outputs()[0][:-5] # Strip .vapi
                     ret.append('--vapidir=' + outdir)
                     ret.append('--girdir=' + outdir)
                     ret.append('--pkg=' + outfile)
@@ -1066,7 +1066,7 @@ class GnomeModule(ExtensionModule):
                 link_with += self._get_vapi_link_with(i.held_object)
                 subdir = os.path.join(state.environment.get_build_dir(),
                                       i.held_object.get_subdir())
-                gir_file = os.path.join(subdir, i.held_object.output[0])
+                gir_file = os.path.join(subdir, i.held_object.get_outputs()[0])
                 cmd.append(gir_file)
             else:
                 raise MesonException('Input must be a str or GirTarget')