Added mksm, SMLinux's package build file generator

mksm

@@ -0,0 +1,226 @@
+#!/bin/bash
+# Part of SMLinux distribution
+# Package build file generator
+set -e
+
+# Date format
+FILEDATE="$(date +%Y%m%d%H%M%S)"
+
+# Archive files
+ARCHIVEFILES=( *.tar.* *.zip *.t?z )
+
+# Function to generate usage options
+mkusage() {
+   cat << EOF
+
+mksm is a tool to generate SMLinux-compatible package build files. It currently
+supports generation of build files for sources that support compilation using:
+-> Make
+-> Autoconf
+-> Cmake
+-> Meson
+
+Usage: mksm <application_name> <application_version> <build_system>
+
+**You must be inside the directory containing source tarball when running mksm.**. 
+For example if you want to build glib 2.60.0, 
+
+$ mkdir glib && cd glib
+$ wget <glib-source-tarball-URL>
+$ ls 
+... 
+glib-2.60.0.tar.xz
+...
+
+$ mksm glib 2.60.0 meson
+
+EOF
+}
+
+# If/else to check if first argument is set. If it isn't, invoke mkusage
+# function and exit
+if [ -z $1 ] ; then
+  mkusage
+  exit 0
+fi
+  
+
+# Explanation same as above, but this time, if first argument is set then
+# set use it as a value for $APPNAME variable
+if [ -n "$1" ] ; then
+  if [ "$1" = "-h" ] || [ "$1" = "-help" ] || [ "$1" = "--help" ] ; then
+    mkusage
+    exit 0
+  else
+    APPNAME="$1"
+   fi
+fi
+
+# If/else to check if second argument is set. If it is, set it as a value
+# for $VERSION variable. If it isn't, throw an error and exit.
+if [ -n "$2" ] ; then
+  VERSION="$2"
+else
+  echo "Version not defined. Kindly define it. Exiting!"
+  exit 1
+fi
+
+# If/else to check if third argument is set. If it is, set it as a value for
+# $BUILDSYS variable. If it isn't, throw an error and exit.
+if [ -n "$3" ] ; then
+  if [ "$3" = "make" ] ; then
+     BUILDSYS="make" 
+  elif [ "$3" = "autoconf" ] ; then
+     BUILDSYS="autoconf" 
+  elif [ "$3" = "cmake" ] ; then
+     BUILDSYS="cmake" 
+  elif [ "$3" = "meson" ] ; then
+     BUILDSYS="meson" 
+  else 
+     echo "ERROR: Invalid build system. Aborting!"
+     exit 1
+  fi
+else
+  echo "Build system not defined. Kindly define one from make, autoconf, cmake or meson. Exiting!"
+  exit 1
+fi
+
+# If $APPNAME, $VERSION and $BUILDSYS variables are set, generate a build file.
+if [ -n "$APPNAME" ] && [ -n "$VERSION" ] && [ -n "$BUILDSYS" ] ; then
+  echo "Generating build file for application '"$APPNAME"' version '"$VERSION"' which uses build system '"$BUILDSYS"'..."
+  echo ""
+  echo "Current directory is $PWD"
+  echo ""
+
+  # Copy the sample build file based on the build system argument passed
+  if [ -f "$APPNAME.SMBuild" ] ; then
+    echo "Found an existing $APPNAME.SMBuild in the current directory." 
+    echo "Backing it up inside a directory 'old' and creating a new one here." 
+    mkdir -p old
+    mv "$APPNAME.SMBuild" old/"$APPNAME.SMBuild.$FILEDATE"
+  fi
+   
+   # This one came in handy:
+   # https://unix.stackexchange.com/questions/505949/expanding-only-certain-variables-inside-a-heredoc
+   # Expand variables in this heredoc
+   cat << EOF > $APPNAME.SMBuild
+APP=$APPNAME
+VERSION=$VERSION
+BUILD=1sml
+HOMEPAGE=""
+DOWNLOAD=""
+DESC=""
+REQUIRES="musl"
+EOF
+   
+   # Single-quoted 'EOF' prevents variables from being expanded in this heredoc
+   cat << 'EOF' >> $APPNAME.SMBuild
+   
+build() {
+  mkandenterbuilddir
+  rm -rf $APP-$VERSION
+
+  tar xf $SRCDIR/$APP-$VERSION.tar.?z*
+  cd $APP-$VERSION
+  fixbuilddirpermissions
+
+EOF
+   
+   # Again prevent variables from being expanded in this heredoc
+   gen_autoconf() {
+     cat << 'EOF' >> $APPNAME.SMBuild
+  ./configure \
+    --prefix="" \
+    --sysconfdir=/etc
+
+  make 
+  make install DESTDIR=$PKG
+
+  cp LICENSE $PKGDOCS/
+
+  mkfinalpkg
+}
+EOF
+}
+
+   gen_make() {
+    cat << 'EOF' >> $APPNAME.SMBuild
+  make
+  make install DESTDIR=$PKG
+
+  cp LICENSE $PKGDOCS/
+
+  mkfinalpkg
+}
+EOF
+}
+   # And again
+   gen_cmake() {
+    cat << 'EOF' >> $APPNAME.SMBuild
+  mkdir smbuild && cd smbuild
+  cmake .. \
+    -DCMAKE_INSTALL_PREFIX="/" \
+    -DCMAKE_C_FLAGS="$CFLAGS" \
+    -DCMAKE_CXX_FLAGS="$CXXFLAGS" \
+    -Wno-dev
+
+  make
+  make install DESTDIR=$PKG
+  
+  cp ../LICENSE $PKGDOCS/
+
+  mkfinalpkg
+}
+EOF
+}
+   
+   # Again :)
+   gen_meson() {
+    cat << 'EOF' >> $APPNAME.SMBuild
+  mkdir smbuild && cd smbuild
+  meson .. \
+    --prefix="/" 
+
+  ninja
+  DESTDIR="$PKG" ninja install
+
+  cp ../LICENSE $PKGDOCS/
+
+  mkfinalpkg
+}
+EOF
+}
+
+   case "$BUILDSYS" in 
+      autoconf) gen_autoconf ;;
+      make) gen_make ;;
+      cmake) gen_cmake ;;
+      meson) gen_meson ;;
+   esac
+
+   chmod +x $APPNAME.SMBuild
+   echo "...done"
+   echo ""
+
+fi
+
+# Generate sha512sums in the build file
+
+  echo "Adding new SHA512SUMS in $APPNAME.SMBuild..."
+  printf '\n' >> "$APPNAME".SMBuild
+  printf 'SHA512SUMS="\n' >> "$APPNAME".SMBuild
+
+  # File types
+  FILES=( *.tar.* *.zip *.t?z *.patch *.diff *.c *.h )
+
+  # Checksum digest to be used along with arguments
+  CHECKSUMBINARY="sha512sum"
+
+  for FILE in ${FILES[@]} ; do
+     if [ -f "$FILE" ] ; then
+       $CHECKSUMBINARY $FILE >> "$APPNAME".SMBuild
+     fi
+  done
+  printf '"' >> "$APPNAME".SMBuild
+  exit 0
+