update ansi coloring for warnings

Author: Schultzer

README.md

@@ -64,31 +64,32 @@ iex(6)> inspect(sql)
 ## Compile time errors
 run `mix sql.get` to generate your `sql.lock` file which is used for error reporting.
 
-```elixir
-  ==> myapp
-  Compiling 1 file (.ex)
-  warning:
-    the relation OPS does not exist
-    the relation email is mentioned 2 times but does not exist
-    the relation users does not exist
-    ~SQL"""
-    select
-      email,
-      1 + "OPS"
-    from
-      users
-    where
-      email = '[email protected]'
-    """
-    lib/myapp.ex:18: Myapp.list_users/0
-    (sql 0.4.0) lib/sql.ex:225: SQL.__inspect__/3
-    (sql 0.4.0) lib/sql.ex:115: SQL.build/4
-    (elixir 1.20.0-dev) src/elixir_dispatch.erl:263: :elixir_dispatch.expand_macro_fun/7
-    (elixir 1.20.0-dev) src/elixir_dispatch.erl:122: :elixir_dispatch.dispatch_import/6
-    (elixir 1.20.0-dev) src/elixir_clauses.erl:192: :elixir_clauses.def/3
-    (elixir 1.20.0-dev) src/elixir_def.erl:218: :elixir_def."-store_definition/10-lc$^0/1-0-"/3
-    (elixir 1.20.0-dev) src/elixir_def.erl:219: :elixir_def.store_definition/10
-```
+<pre>
+==> myapp
+Compiling 1 file (.ex)
+<span style="color: #00AA00;">warning:</span>
+  the relation <span style="color: #AA0000;">OPS</span> does not exist
+  the relation <span style="color: #AA0000;">email</span> is mentioned 2 times but does not exist
+  the relation <span style="color: #AA0000;">users</span> does not exist
+  ~SQL&quot;&quot;&quot;
+  <span style="color: #FF55FF">select</span>
+    <span style="color: #AA0000;">email</span>,
+    <span style="color: #AA5500;">1</span> <span style="color: #FF55FF">+</span> &quot;<span style="color: #AA0000;">OPS</span>&quot;
+  <span style="color: #FF55FF">from</span>
+    <span style="color: #AA0000;">users</span>
+  <span style="color: #FF55FF">where</span>
+    <span style="color: #AA0000;">email</span> <span style="color: #FF55FF">=</span> '<span style="color: #00AA00;">[email protected]</span>'
+  &quot;&quot;&quot;
+  lib/myapp.ex:18: Myapp.list_users/0
+  (sql 0.4.0) lib/sql.ex:225: SQL.__inspect__/3
+  (sql 0.4.0) lib/sql.ex:115: SQL.build/4
+  (elixir 1.20.0-dev) src/elixir_dispatch.erl:263: :elixir_dispatch.expand_macro_fun/7
+  (elixir 1.20.0-dev) src/elixir_dispatch.erl:122: :elixir_dispatch.dispatch_import/6
+  (elixir 1.20.0-dev) src/elixir_clauses.erl:192: :elixir_clauses.def/3
+  (elixir 1.20.0-dev) src/elixir_def.erl:218: :elixir_def."-store_definition/10-lc$^0/1-0-"/3
+  (elixir 1.20.0-dev) src/elixir_def.erl:219: :elixir_def.store_definition/10
+</pre>
+
 
 ## Benchmark
 You can find benchmark results [here](https://github.com/elixir-dbvisor/sql/benchmarks) or run `mix sql.bench`

lib/sql.ex

@@ -219,24 +219,27 @@ defmodule SQL do
     end
   end
 
+  @error IO.ANSI.red()
+  @reset IO.ANSI.reset()
+
   @doc false
   def __inspect__(tokens, context, stack) do
-    inspect = IO.iodata_to_binary(["\e[0m", "~SQL\"\"\""|[SQL.Format.to_iodata(tokens, context)|~c"\n\"\"\""]])
+    inspect = IO.iodata_to_binary([@reset, "~SQL\"\"\""|[SQL.Format.to_iodata(tokens, context)|~c"\n\"\"\""]])
     case context.errors do
       [] -> inspect
       errors ->
         {:current_stacktrace, [_|t]} = Process.info(self(), :current_stacktrace)
-        IO.warn([?\n,format_error(errors), IO.iodata_to_binary(["\e[0m", "  ~SQL\"\"\""|[SQL.Format.to_iodata(tokens, context, 1)|~c"\n  \"\"\""]])], [stack|t])
+        IO.warn([?\n,format_error(errors), IO.iodata_to_binary([@reset, "  ~SQL\"\"\""|[SQL.Format.to_iodata(tokens, context, 1)|~c"\n  \"\"\""]])], [stack|t])
         inspect
     end
   end
 
   @doc false
   def format_error(errors), do: Enum.group_by(errors, &elem(&1, 2)) |> Enum.reduce([], fn
-    {k, [{:special, _, _}]}, acc -> [acc|["  the operator \e[31m",k,"\e[0m is invalid, did you mean any of #{__suggest__(k)}\n"]]
-    {k, [{:special, _, _}|_]=v}, acc -> [acc|["  the operator \e[31m",k,"\e[0m is mentioned #{length(v)} times but is invalid, did you mean any of #{__suggest__(k)}\n"]]
-    {k, [_]}, acc -> [acc|["  the relation \e[31m",k,"\e[0m does not exist\n"]]
-    {k, v}, acc -> [acc|["  the relation \e[31m",k,"\e[0m is mentioned #{length(v)} times but does not exist\n"]]
+    {k, [{:special, _, _}]}, acc -> [acc|["  the operator", @error,k,@reset, " is invalid, did you mean any of #{__suggest__(k)}\n"]]
+    {k, [{:special, _, _}|_]=v}, acc -> [acc|["  the operator ",@error,k,@reset," is mentioned #{length(v)} times but is invalid, did you mean any of #{__suggest__(k)}\n"]]
+    {k, [_]}, acc -> [acc|["  the relation ",@error,k,@reset," does not exist\n"]]
+    {k, v}, acc -> [acc|["  the relation ",@error,k,@reset," is mentioned #{length(v)} times but does not exist\n"]]
   end)
 
   @doc false