[fix] fixes critical bugs due to hazardous rewriting

changelog.sh

@@ -2,21 +2,20 @@
 #Manages an /etc/changelog
 
 
-echo ${BASH_SOURCE[@]}
 APP_PATH=$( cd $(dirname ${BASH_SOURCE[0]}) && pwd )
 APP_NAME=$( basename ${BASH_SOURCE[0]})
 
-[[ -w /etc/changelog ]] || {
-    echo -e "\nYou cannot write to $CHANGELOG... This doesn't look serious!\n"
-    read -e -i y -n 1 -p "Run as sudo [Yn]? : " 
-    [[ "Y" == ${REPLY^} ]] && sudo -E "$APP_PATH/$APP_NAME" && exit 0
-}
-
-
 CHANGELOG=/etc/changelog
 # %CONFIG% This comment is used to build custom scripts 
 [[ -f "$APP_PATH/config.sh" ]] && source "$APP_PATH/config.sh"
 
+# Sanity check on changelog file 
+[[ -f "$CHANGELOG" ]] && [[ ! -w "$CHANGELOG" ]] && {
+    echo -e "\nYou cannot write to $CHANGELOG... This doesn't look serious!\n"
+    read -e -i y -n 1 -p "Run as sudo [Yn]? : " 
+    [[ "Y" == ${REPLY^} ]] && sudo -E "$APP_PATH/$APP_NAME" && exit 0
+}
+
 # functions 
 msg(){ echo -e "$@"; }
 panic(){ msg "${@} Exiting."; exit 1;}
@@ -52,6 +51,15 @@ change(){
   [[ "N" == ${RETURN^^} ]] && return 1
 }
 
+template(){
+FILE="$1"
+cat << HEREDOC 
+
+$(date "+%Y-%m-%d %H:%M") $CHANGELOG_USERNAME
+$( cat "$FILE" |sed 's/^/    /' )
+HEREDOC
+}
+
 hookContentComment(){
   [[ -z "$1" ]] && echo "Enter a simple comment. Ex: systemctl disable nginx" && return
   TMP="$1"
@@ -61,19 +69,12 @@ hookContentComment(){
 
 hookOutputFile(){
   [[ -z "$1" ]] && echo "Writing a local changelog entry to $CHANGELOG" && return
-  local t=$(mktemp)
-  TMP="$1"
-  cat << HEREDOC >$t
-
-
-$(date "+%Y-%m-%d %H:%M") $CHANGELOG_USERNAME
-
-$( echo -e "$@"|sed 's/^/    /' )
-HEREDOC
-
-  [[ -f $CHANGELOG ]] && cat /etc/changelog >> $t 
-  cat "$t" > $CHANGELOG
-  rm -f "$t"
+  local TMP=$(mktemp)
+  SOURCE="$1"
+  template "$SOURCE" > "$TMP"
+  [[ -f "$CHANGELOG" ]] && cat /etc/changelog >> "$TMP"
+  cat "$TMP" > $CHANGELOG
+  rm -f "$TMP"
 
 }
 
@@ -107,7 +108,7 @@ echo -e "\nWelcome to Serious Changelogs Inc. Do you have something for me?\n"
 [[ "  <>" == "$CHANGELOG_USERNAME" ]] && panic "srs.ly?"
 
 # check changelog exists
-[[ ! -f $CHANGELOG ]] && template "* Changelog: Added $CHANGELOG file\nIt was not serious. Fixed!\n\n"
+[[ ! -f "$CHANGELOG" ]] && template "* Changelog: Added $CHANGELOG file\nIt was not serious. Fixed!\n\n" > "$CHANGELOG"
 
 # parse command 
 change "$ENTRY_FILE"