From 7f1d3e252f8c791260f050e2abfda92235bc5f66 Mon Sep 17 00:00:00 2001
From: Antonio Ospite <ao2@ao2.it>
Date: Fri, 17 Jan 2020 17:49:47 +0100
Subject: [PATCH] gst-project-maker: set up a meson project instead of an
 autotools one

Now that autotools has been removed generate a meson project template in
gst-project-maker.

There are some differences with the autotools project

  1. gstreamer-controller-1.0 is not added to the default dependencies.
  2. The '-Wall' option is not set explicitly, meson can handle that.
  3. The flags in GST_PLUGIN_LDFLAGS have not been ported to meson as
     they are not necessary anymore.

The generated project requires meson 0.53.0 for the 'fs' module. It's up
to the user to remove that part in case compatibility with older
versions of meson is desired.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/184>
---
 tools/gst-project-maker | 222 +++++++++++++++++-----------------------
 1 file changed, 94 insertions(+), 128 deletions(-)

diff --git a/tools/gst-project-maker b/tools/gst-project-maker
index 7d405d04c3..7dcc407e78 100755
--- a/tools/gst-project-maker
+++ b/tools/gst-project-maker
@@ -93,144 +93,107 @@ EOF
 
 cat >$basedir/README <<EOF
 README for your project.
+
+NOTE:
+plugins can be installed locally by using "\$HOME" as prefix:
+
+  $ meson --prefix="\$HOME" build/
+  $ ninja -C build/ install
+
+However be advised that the automatic scan of plugins in the user home
+directory won't work under gst-build devenv.
 EOF
 
-cat >$basedir/autogen.sh <<EOF
-#!/bin/sh
-# you can either set the environment variables AUTOCONF, AUTOHEADER, AUTOMAKE,
-# ACLOCAL, AUTOPOINT and/or LIBTOOLIZE to the right versions, or leave them
-# unset and get the defaults
+cat >$basedir/meson.build <<EOF
+project('${gst__replace}', 'c',
+  version : '0.1.0',
+  default_options : [ 'warning_level=1',
+                      'buildtype=debugoptimized' ])
 
-autoreconf --verbose --force --install --make || {
- echo 'autogen.sh failed';
- exit 1;
-}
+core_conf = configuration_data()
+core_conf.set('PACKAGE', '"@0@"'.format(meson.project_name()))
+core_conf.set('VERSION', '"@0@"'.format(meson.project_version()))
 
-./configure || {
- echo 'configure failed';
- exit 1;
-}
+configure_file(output : 'config.h', configuration : core_conf)
 
-echo
-echo "Now type 'make' to compile this module."
-echo
-EOF
-chmod 755 $basedir/autogen.sh
+configinc = include_directories('.')
 
-cat >$basedir/configure.ac <<EOF
-dnl required version of autoconf
-AC_PREREQ([2.53])
+common_args = ['-DHAVE_CONFIG_H']
 
-dnl TODO: fill in your package name and package version here
-AC_INIT([${gst__replace}],[1.0.0])
+gst_req = '>= 1.0.0'
 
-dnl required versions of gstreamer and plugins-base
-GST_REQUIRED=1.0.0
-GSTPB_REQUIRED=1.0.0
+# Check for the required version of GStreamer core (and gst-plugins-base)
+#
+# If you need libraries from gst-plugins-base here, also add:
+# for libgstaudio-1.0: gstreamer-audio-1.0
+# for libgstvideo-1.0: gstreamer-video-1.0
+# for libgsttag-1.0: gstreamer-tag-1.0
+# for libgstpbutils-1.0: gstreamer-pbutils-1.0
+# for libgstfft-1.0: gstreamer-fft-1.0
+# for libgstinterfaces-1.0: gstreamer-interfaces-1.0
+# for libgstrtp-1.0: gstreamer-rtp-1.0
+# for libgstrtsp-1.0: gstreamer-rtsp-1.0
+# etc.
+gst_dep = dependency('gstreamer-1.0', version : gst_req,
+  fallback : ['gstreamer', 'gst_dep'])
+gst_base_dep = dependency('gstreamer-base-1.0', version : gst_req,
+  fallback : ['gstreamer', 'gst_base_dep'])
 
-AC_CONFIG_SRCDIR([plugins/${gstreplace}.c])
-AC_CONFIG_HEADERS([config.h])
-
-dnl required version of automake
-AM_INIT_AUTOMAKE([1.10])
-AC_CONFIG_MACRO_DIR([m4])
-
-dnl enable mainainer mode by default
-AM_MAINTAINER_MODE([enable])
-
-dnl check for tools (compiler etc.)
-AC_PROG_CC
-AM_PROG_CC_C_O
-
-dnl required version of libtool
-LT_PREREQ([2.2.6])
-LT_INIT
-
-dnl give error and exit if we don't have pkgconfig
-AC_CHECK_PROG(HAVE_PKGCONFIG, pkg-config, [ ], [
-  AC_MSG_ERROR([You need to have pkg-config installed!])
-])
-
-dnl Check for the required version of GStreamer core (and gst-plugins-base)
-dnl This will export GST_CFLAGS and GST_LIBS variables for use in Makefile.am
-dnl
-dnl If you need libraries from gst-plugins-base here, also add:
-dnl for libgstaudio-1.0: gstreamer-audio-1.0 >= \$GST_REQUIRED
-dnl for libgstvideo-1.0: gstreamer-video-1.0 >= \$GST_REQUIRED
-dnl for libgsttag-1.0: gstreamer-tag-1.0 >= \$GST_REQUIRED
-dnl for libgstpbutils-1.0: gstreamer-pbutils-1.0 >= \$GST_REQUIRED
-dnl for libgstfft-1.0: gstreamer-fft-1.0 >= \$GST_REQUIRED
-dnl for libgstinterfaces-1.0: gstreamer-interfaces-1.0 >= \$GST_REQUIRED
-dnl for libgstrtp-1.0: gstreamer-rtp-1.0 >= \$GST_REQUIRED
-dnl for libgstrtsp-1.0: gstreamer-rtsp-1.0 >= \$GST_REQUIRED
-dnl etc.
-PKG_CHECK_MODULES(GST, [
-  gstreamer-1.0 >= \$GST_REQUIRED
-  gstreamer-base-1.0 >= \$GST_REQUIRED
-  gstreamer-controller-1.0 >= \$GST_REQUIRED
-], [
-  AC_SUBST(GST_CFLAGS)
-  AC_SUBST(GST_LIBS)
-], [
-  AC_MSG_ERROR([
-      You need to install or upgrade the GStreamer development
-      packages on your system. On debian-based systems these are
-      libgstreamer1.0-dev and libgstreamer-plugins-base1.0-dev.
-      on RPM-based systems gstreamer1.0-devel, libgstreamer1.0-devel
-      or similar. The minimum version required is \$GST_REQUIRED.
-  ])
-])
-
-dnl check if compiler understands -Wall (if yes, add -Wall to GST_CFLAGS)
-AC_MSG_CHECKING([to see if compiler understands -Wall])
-save_CFLAGS="\$CFLAGS"
-CFLAGS="\$CFLAGS -Wall"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ ], [ ])], [
-  GST_CFLAGS="\$GST_CFLAGS -Wall"
-  AC_MSG_RESULT([yes])
-], [
-  AC_MSG_RESULT([no])
-])
-
-dnl set the plugindir where plugins should be installed (for plugins/Makefile.am)
-if test "x\${prefix}" = "x\$HOME"; then
-  plugindir="\$HOME/.gstreamer-1.0/plugins"
+# Set the directory where plugins should be installed.
+#
+# If the prefix is the user home directory, adjust the plugin installation
+# path so that GStreamer can find it. Requires meson >= 0.53.0
+fs = import('fs')
+if fs.is_samepath(get_option('prefix'), '~')
+  plugins_install_dir = '@0@/.local/share/gstreamer-1.0/plugins'.format(get_option('prefix'))
 else
-  plugindir="\\\$(libdir)/gstreamer-1.0"
-fi
-AC_SUBST(plugindir)
+  plugins_install_dir = '@0@/gstreamer-1.0'.format(get_option('libdir'))
+endif
 
-dnl set proper LDFLAGS for plugins
-GST_PLUGIN_LDFLAGS='-module -avoid-version -export-symbols-regex [_]*\(gst_\|Gst\|GST_\).*'
-AC_SUBST(GST_PLUGIN_LDFLAGS)
+plugin_deps = [gst_dep, gst_base_dep]
+tool_deps = [gst_dep]
 
-AC_CONFIG_FILES([Makefile plugins/Makefile tools/Makefile])
-AC_OUTPUT
+subdir('plugins')
+subdir('tools')
 EOF
 
-cat >$basedir/Makefile.am <<EOF
-SUBDIRS = plugins tools
-
-EXTRA_DIST = autogen.sh
-
-ACLOCAL_AMFLAGS = -I m4
-EOF
-
-mkdir -p $basedir/m4
 
 mkdir -p $basedir/plugins
 
-cat >$basedir/plugins/Makefile.am <<EOF
-plugin_LTLIBRARIES = lib$gstreplace.la
+cat >$basedir/plugins/meson.build <<EOF
+lib_args = common_args + []
 
 # sources used to compile this plug-in
-lib${gstreplace}_la_SOURCES = ${gstreplace}plugin.c ${gstreplace}.c ${gstreplace}.h
+plugin_sources = [
+  '${gstreplace}plugin.c',
+  '${gstreplace}.c',
+  '${gstreplace}.h'
+]
 
-# compiler and linker flags used to compile this plugin, set in configure.ac
-lib${gstreplace}_la_CFLAGS = \$(GST_CFLAGS)
-lib${gstreplace}_la_LIBADD = \$(GST_LIBS)
-lib${gstreplace}_la_LDFLAGS = \$(GST_PLUGIN_LDFLAGS)
+shlib = shared_library('${gstreplace}',
+  plugin_sources,
+  c_args : lib_args,
+  include_directories: [configinc],
+  dependencies : plugin_deps,
+  gnu_symbol_visibility : 'hidden',
+  install : true,
+  install_dir : plugins_install_dir,
+)
 
+# Make this library usable as a Meson subproject.
+gst_${replace}_dep = declare_dependency(
+  include_directories: include_directories('.'),
+  link_with : shlib)
+
+pkg_mod = import('pkgconfig')
+pkg_mod.generate(
+  name : '${gst__replace}',
+  filebase : '${gst__replace}',
+  description : 'Meson sample project.',
+  subdirs : 'src',
+  libraries : shlib,
+  version : '"@0@"'.format(meson.project_version()),
+)
 EOF
 
 
@@ -240,7 +203,7 @@ cat <<EOF
 /*
  * GStreamer
  * Copyright (C) $(date +%Y) $REAL_NAME <$EMAIL_ADDRESS>
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
@@ -323,7 +286,7 @@ generate | sed \
   -e "s/gstreplace/$gstreplace/g" \
   -e "s/replace/$replace/g" >$basedir/plugins/${gstreplace}plugin.c
 
-gst-indent $basedir/plugins/${gstreplace}plugin.c
+gst-indent $basedir/plugins/${gstreplace}plugin.c || echo "Warning: could not run gst-indent on the generated code." 1>&2
 rm -f $basedir/plugins/${gstreplace}plugin.c~
 
 cat >$basedir/plugins/${gstreplace}.c <<EOF
@@ -360,16 +323,21 @@ EOF
 
 mkdir -p $basedir/tools
 
-cat >$basedir/tools/Makefile.am <<EOF
-bin_PROGRAMS = ${gst__replace}
+cat >$basedir/tools/meson.build <<EOF
+exe_args = common_args + []
 
 # sources used to compile this program
-${gst_replace}_SOURCES = ${gstreplace}.c
-
-# compiler and linker flags used to compile the program, set in configure.ac
-${gst_replace}_CFLAGS = \$(GST_CFLAGS)
-${gst_replace}_LDADD = \$(GST_LIBS)
+tool_sources = [
+  '${gstreplace}.c',
+]
 
+executable('${gstreplace}',
+  tool_sources,
+  install: true,
+  c_args : exe_args,
+  include_directories: [configinc],
+  dependencies : tool_deps,
+)
 EOF
 
 cat >$basedir/tools/${gstreplace}.c <<EOF
@@ -385,5 +353,3 @@ cat >$basedir/tools/${gstreplace}.c <<EOF
 #include <stdio.h>
 int main (void) { printf ("FIXME\n"); return 0; }
 EOF
-
-