Improve install_os_dependencies.sh (#605)

* rename requirements.apt -> requirements-trusty.apt
and requirements.apt.xenial -> requirements-xenial.apt

* improve install_os_dependencies.sh

* remove unused non-python requirements

* rename "install" function to "install_packages" and
"upgrade" function to "upgrade_packages" to solve shellcheck lint errors

{{cookiecutter.project_slug}}/utility/install_os_dependencies.sh

@@ -1,14 +1,17 @@
 #!/bin/bash
 
 WORK_DIR="$(dirname "$0")"
-OS_REQUIREMENTS_FILENAME="$WORK_DIR/requirements.apt"
+DISTRO_NAME=$(lsb_release -sc)
 
-VER=$(lsb_release -sr)
-if [ "$VER" == "16.04" ]; then
-  OS_REQUIREMENTS_FILENAME="requirements.apt.xenial"
-else
-  OS_REQUIREMENTS_FILENAME="requirements.apt"
+OS_REQUIREMENTS_FILENAME="$WORK_DIR/requirements-$DISTRO_NAME.apt"
+
+
+if [ "$DISTRO_NAME" != "xenial" ] && [ "$DISTRO_NAME" != "trusty" ]; then
+  echo "Only the Ubuntu 14.04 (Trusty) and 16.04 (Xenial) is supported by this script";
+  echo "You can see requirements-trusty.apt or requirements-xenial.apt file to help search the equivalent package in your system";
+  exit 1;
 fi
+
 # Handle call with wrong command
 function wrong_command()
 {
@@ -31,15 +34,15 @@ function usage_message()
 
 # Read the requirements.apt file, and remove comments and blank lines
 function list_packages(){
-     grep -v "#" ${OS_REQUIREMENTS_FILENAME} | grep -v "^$";
+     grep -v "#" "${OS_REQUIREMENTS_FILENAME}" | grep -v "^$";
 }
 
-function install()
+function install_packages()
 {
     list_packages | xargs apt-get --no-upgrade install -y;
 }
 
-function upgrade()
+function upgrade_packages()
 {
     list_packages | xargs apt-get install -y;
 }
@@ -53,7 +56,7 @@ function install_or_upgrade()
     if [[ $EUID -ne 0 ]]; then
         echo -e "\nYou must run this with root privilege" 2>&1
         echo -e "Please do:\n" 2>&1
-        echo "sudo ./${0##*/} $PARAN" 2>&1
+        echo "sudo ./$WORK_DIR/${0##*/} $PARAN" 2>&1
         echo -e "\n" 2>&1
 
         exit 1
@@ -63,9 +66,9 @@ function install_or_upgrade()
 
         # Install the basic compilation dependencies and other required libraries of this project
         if [ "$PARAN" == "install" ]; then
-            install;
+            install_packages;
         else
-            upgrade;
+            upgrade_packages;
         fi
 
         # cleaning downloaded packages from apt-get cache
@@ -84,5 +87,5 @@ case "$1" in
     upgrade) install_or_upgrade "upgrade";;
     list) list_packages;;
     help) usage_message;;
-    *) wrong_command $1;;
+    *) wrong_command "$1";;
 esac

{{cookiecutter.project_slug}}/utility/requirements-trusty.apt

@@ -1,4 +1,4 @@
-##basic build dependencies of various Django apps for Ubuntu 14.04
+##basic build dependencies of various Django apps for Ubuntu Trusty 14.04
 #build-essential metapackage install: make, gcc, g++,
 build-essential
 #required to translate
@@ -25,3 +25,4 @@ libwebp-dev
 
 ##django-extensions
 graphviz-dev
+

{{cookiecutter.project_slug}}/utility/requirements-xenial.apt

@@ -0,0 +1,28 @@
+##basic build dependencies of various Django apps for Ubuntu Xenial 16.04
+#build-essential metapackage install: make, gcc, g++,
+build-essential
+#required to translate
+gettext
+{% if cookiecutter.use_python2 == 'n' -%}
+python3-dev
+{% else %}
+python-dev
+{%- endif %}
+
+##shared dependencies of:
+##Pillow, pylibmc
+zlib1g-dev
+
+##Postgresql and psycopg2 dependencies
+libpq-dev
+
+##Pillow dependencies
+libtiff5-dev
+libjpeg8-dev
+libfreetype6-dev
+liblcms2-dev
+libwebp-dev
+
+##django-extensions
+graphviz-dev
+

{{cookiecutter.project_slug}}/utility/requirements.apt.xenial

@@ -1,44 +0,0 @@
-##basic build dependencies of various Django apps for Ubuntu 14.04
-#build-essential metapackage install: make, gcc, g++, 
-build-essential
-#required to translate
-gettext
-python-dev
-
-##shared dependencies of:
-##Pillow, pylibmc
-zlib1g-dev
-
-##Postgresql and psycopg2 dependencies
-libpq-dev
-
-##Pillow dependencies
-libtiff5-dev
-libjpeg8-dev
-libfreetype6-dev
-liblcms2-dev
-libwebp-dev
-
-
-##django-extensions
-graphviz-dev
-
-##hitch
-python-setuptools
-python3-dev
-python-virtualenv
-python-pip
-firefox
-automake
-libtool
-libreadline6
-libreadline6-dev
-libreadline-dev
-libsqlite3-dev
-libxml2
-libxml2-dev
-libssl-dev
-libbz2-dev
-wget
-curl
-llvm