Update to use new mkinfo from tcell

This update incorporates the new terminfo updates in tcell into micro
essentially merging zyedidia/mkinfo into micro. The zyedidia/mkinfo
program should no longer be necessary and micro should automatically
generate a tcell database on its own if it cannot find a terminal
entry. The tcell database will be located in `configDir/.tcelldb`.

Ref #20
Ref #922

cmd/micro/micro.go

@@ -14,6 +14,7 @@ import (
 	"github.com/mitchellh/go-homedir"
 	"github.com/yuin/gopher-lua"
 	"github.com/zyedidia/clipboard"
+	"github.com/zyedidia/micro/cmd/micro/terminfo"
 	"github.com/zyedidia/tcell"
 	"github.com/zyedidia/tcell/encoding"
 	"layeh.com/gopher-luar"
@@ -183,6 +184,9 @@ func InitScreen() {
 	// Should we enable true color?
 	truecolor := os.Getenv("MICRO_TRUECOLOR") == "1"
 
+	tcelldb := os.Getenv("TCELLDB")
+	os.Setenv("TCELLDB", configDir+"/.tcelldb")
+
 	// In order to enable true color, we have to set the TERM to `xterm-truecolor` when
 	// initializing tcell, but after that, we can set the TERM back to whatever it was
 	oldTerm := os.Getenv("TERM")
@@ -194,12 +198,15 @@ func InitScreen() {
 	var err error
 	screen, err = tcell.NewScreen()
 	if err != nil {
-		fmt.Println(err)
 		if err == tcell.ErrTermNotFound {
-			fmt.Println("Micro does not recognize your terminal:", oldTerm)
-			fmt.Println("Please go to https://github.com/zyedidia/mkinfo to read about how to fix this problem (it should be easy to fix).")
+			terminfo.WriteDB(configDir + "/.tcelldb")
+			screen, err = tcell.NewScreen()
+			if err != nil {
+				fmt.Println(err)
+				fmt.Println("Fatal: Micro could not initialize a screen.")
+				os.Exit(1)
+			}
 		}
-		os.Exit(1)
 	}
 	if err = screen.Init(); err != nil {
 		fmt.Println(err)
@@ -215,6 +222,8 @@ func InitScreen() {
 		screen.EnableMouse()
 	}
 
+	os.Setenv("TCELLDB", tcelldb)
+
 	// screen.SetStyle(defStyle)
 }
 

cmd/micro/terminfo/README.md

@@ -0,0 +1,6 @@
+# Terminfo parser
+
+This terminfo parser was written by the authors of [tcell](github.com/gdamore/tcell). We are using it here
+to compile the terminal database if the terminal entry is not found in set of precompiled terminals.
+
+The source for `mkinfo.go` is adapted from tcell's `mkinfo` tool to be more of a library.