replacing OS vars: use .orig files to prevent overwriting

1 files changed, 30 insertions, 5 deletions

diff --git a/priv/templates/extended_bin b/priv/templates/extended_bin
index b752229..3c406aa 100755
--- a/priv/templates/extended_bin
+++ b/priv/templates/extended_bin
@@ -98,9 +98,23 @@ if [ -z "$VMARGS_PATH" ]; then
     fi
 fi
 
+orig_vmargs_path="$VMARGS_PATH.orig"
 if [ $RELX_REPLACE_OS_VARS ]; then
-    awk '{while(match($0,"[$]{[^}]*}")) {var=substr($0,RSTART+2,RLENGTH -3);gsub("[$]{"var"}",ENVIRON[var])}}1' < $VMARGS_PATH > $VMARGS_PATH.2.config
-    VMARGS_PATH=$VMARGS_PATH.2.config
+    #Make sure we don't break dev mode by keeping the symbolic link to 
+    #the user's vm.args
+    if [ ! -L "$orig_vmargs_path" ]; then
+       #we're in copy mode, rename the vm.args file to vm.args.orig
+       mv "$VMARGS_PATH" "$orig_vmargs_path"
+    fi
+
+    awk '{while(match($0,"[$]{[^}]*}")) {var=substr($0,RSTART+2,RLENGTH -3);gsub("[$]{"var"}",ENVIRON[var])}}1' < "$orig_vmargs_path" > "$VMARGS_PATH"
+ else
+    #We don't need to replace env. vars, just rename the
+    #symlink vm.args.orig to vm.args, and keep it as a
+    #symlink.
+    if [ -L "$orig_vmargs_path" ]; then
+       mv "$orig_vmargs_path" "$VMARGS_PATH" 
+    fi
 fi
 
 # Make sure log directory exists
@@ -115,12 +129,23 @@ if [ -z "$RELX_CONFIG_PATH" ]; then
     fi
 fi
 
+orig_relx_config_path="$RELX_CONFIG_PATH.orig"
 if [ $RELX_REPLACE_OS_VARS ]; then
-    #Make sure we don't break dev mode by keeping the symbolic link
-    orig_relx_config_path="$RELX_CONFIG_PATH.orig"
-    mv "$RELX_CONFIG_PATH" "$orig_relx_config_path"
+    #Make sure we don't break dev mode by keeping the symbolic link to 
+    #the user's sys.config
+    if [ ! -L "$orig_relx_config_path" ]; then
+       #We're in copy mode, rename sys.config to sys.config.orig
+       mv "$RELX_CONFIG_PATH" "$orig_relx_config_path"
+    fi
 
     awk '{while(match($0,"[$]{[^}]*}")) {var=substr($0,RSTART+2,RLENGTH -3);gsub("[$]{"var"}",ENVIRON[var])}}1' < "$orig_relx_config_path" > "$RELX_CONFIG_PATH"
+ else
+    #We don't need to replace env. vars, just rename the
+    #symlink sys.config.orig to sys.config. Keep it as 
+    #a symlink.
+    if [ -L "$orig_relx_config_path" ]; then
+       mv "$orig_relx_config_path"  "$RELX_CONFIG_PATH"
+    fi
 fi
 
 # Extract the target node name from node.args