Warn on missing replacements; handle Ruby vars with single and double quotes

bin/create_config.sh

@@ -8,6 +8,7 @@
 # ----------------------------------------------------------------------
 # 2020-12-15  v0.0  <axel.hahn@iml.unibe.ch>
 # 2021-05-07  v1.0  <axel.hahn@iml.unibe.ch>  multiple replacement files
+# 2021-05-27  v1.1  <axel.hahn@iml.unibe.ch>  Warn on missing replacements; handle Ruby vars with single and double quotes
 # ======================================================================
 
 # ----------------------------------------------------------------------
@@ -78,10 +79,11 @@ if [ $? -ne 0 ]; then
     exit 2
 fi
 
-echo --- Replacements to apply:
-grep "^[a-zA-Z]" $replacefile | grep "=" 
-if [ $? -ne 0 ]; then
-    _err "ERROR: No replacements were found ... wrong syntax? Use KEY = VALUE."
+typeset -i iReplacements=$( grep "^[a-zA-Z]" $replacefile | grep "=" | wc -l )
+echo --- Replacements to apply: $iReplacements
+if [ $iReplacements -eq 0 ]; then
+    _err "ERROR: No replacements were found ... maybe a wrong syntax?"
+    _err "       Use KEY=VALUE; no spaces in front; now quotes around VALUE"
     exit 2
 fi
 
@@ -94,19 +96,27 @@ do
     key=$( echo $line | cut -f 2- -d ":" | cut -f 1 -d "=" ) 
     val=$( echo $line | cut -f 2- -d "=" )
 
-    regex="<\%\=\ *\@replace\[\"$key\"\]\ *\%>"
-    grep "$regex" $tmpfile >/dev/null || echo "WARNING: template [$tplfile] has no placeholder key [$key]"
-    # Ruby erb template syntax: <% @replace["mykey"] %>
-    # sed -i "s#<\%\ *\@replace\[\"$key\"\]\ *\%>#$val#g" $tmpfile
-    sed -i "s#$regex#$val#g" $tmpfile
+    # Ruby erb template syntax to write a variable: <% @replace["mykey"] %>
+    # Here are 2 regex to handle single and double quotes
+    regex1="<\%\=\ *\@replace\[\'$key\'\]\ *\%>"
+    regex2="<\%\=\ *\@replace\[\"$key\"\]\ *\%>"
+
+    # Show a warning if both regex do not match
+    grep "$regex1" $tmpfile >/dev/null \
+      || grep "$regex2" $tmpfile >/dev/null \
+      || echo "WARNING: template [$tplfile] has no placeholder key [$key]"
+
+    sed -i "s#$regex1#$val#g" $tmpfile
+    sed -i "s#$regex2#$val#g" $tmpfile
 done
 
 # --- verify changes
 echo
-echo --- changes:
+echo --- Changes:
 diff "$tplfile" "$tmpfile"
 if [ $? -eq 0 ]; then
     _err "ERROR: template was unchanged. Check placeholders in $tplfile and replacements:"
+    echo Content of relacement files:
     cat $replacefile
     exit 3
 fi
@@ -115,18 +125,19 @@ fi
 mv -f "${tmpfile}" "${outfile}" 
 
 echo
-echo --- output file:
+echo --- Output file:
 ls -l  "${outfile}" 
 if [ $? -ne 0 ]; then
     _err "ERROR: unable to write target file $outfile."
     exit 4
 fi
 
-grep '<\%\=\ *\@replace\[\"' ${outfile} >/dev/null
+echo --- Check missing replacements
+grep '<\%\=\ *\@replace\[' ${outfile} >/dev/null
 if [ $? -eq 0 ]; then
     echo
-    _warn "WARNING: Maybe you need to verify replacements (can be a false positive)"
-    grep '<\%\=\ *\@replace\[\"' ${outfile}
+    _warn "WARNING: Maybe you need to verify replacements (hmmm, could be a false positive too)"
+    grep '<\%\=\ *\@replace\[' ${outfile}
 else
     _ok "OK" 
 fi