sensh: add meson build system

The top-level Makefile is difficult to use and add new source files. Add
a new build system so that a future set of breaking changes can remove
it.

README.md

@@ -10,15 +10,21 @@ which lines were entered by the user.
 
  - gcc
  - libqrtr
- - make
+ - meson or make
  - protobuf-c
  - qmic (https://github.com/andersson/qmic)
 
 # Installation
 
-There is a Makefile to compile this:
+This can be compiled using Meson:
 
-    $ make
+    $ meson setup build
+    $ ninja -C build
+
+There is also a Makefile to compile this, if you can get it to work:
+
+    $ mkdir build
+    $ make -k
 
 # Usage
 

meson.build

@@ -0,0 +1,34 @@
+#
+# Build system root
+#
+# Copyright (C) 2023 Richard Acayan
+#
+# This file is part of sensh.
+#
+# Sensh is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+project('sensh', 'c')
+
+libqrtr = meson.get_compiler('c').find_library('qrtr')
+libprotobuf_c = dependency('libprotobuf-c')
+
+subdir('protobuf')
+subdir('qmi')
+
+executable('sensh',
+  'sensh.c',
+  qmi,
+  protobufs,
+  dependencies : [libprotobuf_c, libqrtr])

protobuf/meson.build

@@ -0,0 +1,48 @@
+#
+# Protocol buffers build system
+#
+# Copyright (C) 2023 Richard Acayan
+#
+# This file is part of sensh.
+#
+# Sensh is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+protoc = find_program('protoc-c')
+
+protobuf_src = [
+  'sns_client_event_msg',
+  'sns_client_request_msg',
+  'sns_proximity_event',
+  'sns_std_attr_event',
+  'sns_std_attr_req',
+  'sns_std_sensor_event',
+  'sns_std_suid',
+  'sns_suid_event',
+  'sns_suid_req']
+
+protobufs = []
+
+foreach protobuf : protobuf_src
+  protobufs += custom_target(protobuf,
+    command : [
+      protoc,
+      '--c_out=@OUTDIR@',
+      '--proto_path=@CURRENT_SOURCE_DIR@',
+      '--dependency_out=@DEPFILE@',
+      '@INPUT@'],
+    input : protobuf + '.proto',
+    output : ['@BASENAME@.pb-c.c', '@BASENAME@.pb-c.h'],
+    depfile : '@BASENAME@.pb-c.d')
+endforeach

qmi/meson.build

@@ -0,0 +1,28 @@
+#
+# QMI Build system
+#
+# Copyright (C) 2023 Richard Acayan
+#
+# This file is part of sensh.
+#
+# Sensh is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+qmic = find_program('qmic')
+wrapper = files('qmic_wrapper.sh')
+
+qmi = custom_target('qmi_sns_client',
+  command : [wrapper, qmic, '@INPUT@', '@OUTDIR@'],
+  input : 'sns_client.qmi',
+  output : ['qmi_sns_client.c', 'qmi_sns_client.h'])

qmi/qmic_wrapper.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+#
+# QMI interface compiler wrapper
+#
+# Copyright (C) 2023 Richard Acayan
+#
+# This file is part of sensh.
+#
+# Sensh is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+qmic="$1"
+
+#
+# Usage: qmic_wrapper.sh QMIC INPUT OUTPUT_DIRECTORY
+#
+# Example: qmic_wrapper.sh /usr/bin/qmic ../qmi/sns_client.qmi qmi/
+#
+
+#
+# We need to move into the output directory so QMIC puts the files in the
+# correct place, but the path to the input might be relative to the directory
+# we are already in. Open the file now and pipe it to stdin so the pathname
+# gets processed relative to the correct directory.
+#
+exec < "$2"
+
+cd "$3"
+exec "$qmic" -k