Runtime checks

- Check for presence of WX when running a GUI app
- Ensure current Erlang runtime matches bytecode on Linux

unix/get_zx

@@ -6,8 +6,15 @@
 version=0.12.3
 zx="zx-$version"
 tarball="$zx.tar.gz"
+target="https://zxq9.com/projects/zomp/$tarball"
+
+if command -v wget &> /dev/null
+  then
+    wget -nv "$target"
+  else
+    curl -s "$target" --output "$tarball"
+fi
 
-wget -nv "https://zxq9.com/projects/zomp/$tarball"
 tar -zxf "$tarball"
 cd "$zx"
 chmod +x install

unix/zx

@@ -1,7 +1,7 @@
 #! /bin/bash
 
 if [ -f "$HOME/.bash_profile" ]
-then
+  then
     . "$HOME"/.bash_profile
 fi
 
@@ -9,12 +9,29 @@ export ZOMP_DIR="${ZOMP_DIR:-$HOME/zomp}"
 export ZX_VERSION=$(cat "$ZOMP_DIR/etc/version.txt")
 export ZX_DIR="$ZOMP_DIR/lib/otpr/zx/$ZX_VERSION"
 
+last_file="$ZOMP_DIR/last.erts"
+if [[ -f "$last_file" ]]
+    then
+        last_erts=$(cat "$last_file")
+    else
+        last_erts="NONE"
+fi
+
+curr_erts=$(erl -version 2>&1)
+if [[ $last_erts != $curr_erts ]]
+  then
+    pushd "$ZOMP_DIR/lib" > /dev/null
+    find . -name "*.beam" -type f -delete
+    echo "$curr_erts" > "$last_file"
+    popd > /dev/null
+fi
+
 start_dir="$PWD"
 cd "$ZX_DIR"
 if [ ! -f ebin/zx.beam ]
-then
+  then
     chmod +x make_zx
-    ./make_zx
+    ./make_zx 1>&2
 fi
 cd "$start_dir"
 erl -noshell -pa "$ZX_DIR/ebin" -run zx do -extra $@

unix/zxh

@@ -1,7 +1,7 @@
 #! /bin/bash
 
 if [ -f "$HOME/.bash_profile" ]
-then
+  then
     . "$HOME"/.bash_profile
 fi
 
@@ -9,12 +9,29 @@ export ZOMP_DIR="${ZOMP_DIR:-$HOME/zomp}"
 export ZX_VERSION=$(cat "$ZOMP_DIR/etc/version.txt")
 export ZX_DIR="$ZOMP_DIR/lib/otpr/zx/$ZX_VERSION"
 
+last_file="$ZOMP_DIR/last.erts"
+if [[ -f "$last_file" ]]
+    then
+        last_erts=$(cat "$last_file")
+    else
+        last_erts="NONE"
+fi
+
+curr_erts=$(erl -version 2>&1)
+if [[ $last_erts != $curr_erts ]]
+  then
+    pushd "$ZOMP_DIR/lib" > /dev/null
+    find . -name "*.beam" -type f -delete
+    echo "$curr_erts" > "$last_file"
+    popd > /dev/null
+fi
+
 start_dir="$PWD"
 cd "$ZX_DIR"
 if [ ! -f ebin/zx.beam ]
-then
+  then
     chmod +x make_zx
-    ./make_zx
+    ./make_zx 1>&2
 fi
 cd "$start_dir"
 erl -pa "$ZX_DIR/ebin" -run zx do -extra $@