rename /bin/have.bat to /vendor/lib/flag_exists.cmd

Please use %flag_exists% instead of using have

vendor/lib/flag_exists.cmd

@@ -0,0 +1,112 @@
+@echo off
+set "flag_exists=%~dp0flag_exists"
+setlocal
+
+if "%~1" equ "" goto :wrongSyntax
+
+if not defined CMDER_USER_FLAGS (
+  set "CMDER_USER_FLAGS= "
+)
+
+set "feNOT=false"
+goto :parseArgument
+
+:doShift
+  shift
+
+:parseArgument
+set "currenTarg=%~1"
+if /i "%currenTarg%" == "/?" (
+  goto :help
+) else if /i "%currenTarg%" equ "/help" (
+  goto :help
+) else if /i "%currenTarg%" equ "/h" (
+  goto :help
+) else if /i "%currenTarg%" equ "NOT" (
+  set "feNOT=true"
+  goto :doShift
+) else (
+  if "%~1" equ "" goto :wrongSyntax
+  if "%~2" equ "" goto :wrongSyntax
+  set "feArgName=%~1"
+  set "feCommand=%~2"
+  goto :detect
+)
+
+:detect
+:: to avoid erroneous deteciton like "/do" "/doNOT", both have a "/do"
+:: but if it works like "/do " "/doNOT ", "/do " won't match "/doN"
+set "CMDER_USER_FLAGS=%CMDER_USER_FLAGS% "
+set "feArgName=%feArgName% "
+:: echo.
+:: echo %CMDER_USER_FLAGS%
+:: echo %feNOT%
+:: echo %feArgName%
+:: echo %feCommand%
+:: echo.
+echo %CMDER_USER_FLAGS% | find /i "%feArgName%">nul
+if "%ERRORLEVEL%" == "0" (
+  if "%feNOT%" == "false" (
+    call "%feCommand%"
+  )
+) else (
+  if "%feNOT%" == "true" (
+    call "%feCommand%"
+  )
+)
+exit /b
+
+:wrongSyntax
+echo The syntax of the command is incorrect.
+echo.
+echo use /? for help
+echo.
+exit /b
+
+:help
+echo.
+echo %%flag_exists%%
+echo.
+echo Handles with custom arguments for cmder's init.bat.
+echo   written by xiazeyu, inspired DRSDavidSoft.
+echo.
+echo Usage:
+echo.
+echo %%flag_exists%% [NOT] argName command
+echo.
+echo   NOT      Specifies that %%flag_exists%% should carry out
+echo            the command only if the condition is false.
+echo.
+echo   argName  Specifies which argument name is to detect.
+echo.
+echo   command  Specifies the command to carry out if the
+echo            argument name is detected. It's recommand to
+echo            use a pair of double quotation marks to
+echo            wrap your command to avoid exceed expectation.
+echo.
+echo Examples:
+echo.
+echo   these examples are expected to be writted in /config/user-profile.cmd
+echo   it will use the environment varible "CMDER_USER_FLAGS"
+echo.
+echo   Case 1:
+echo.
+echo   The following command in user-profile.cmd would execute "notepad.exe"
+echo.
+echo     call %%flag_exists%% "/startNotepad" "cmd /c start notepad.exe"
+echo.
+echo   if you pass parameter to init.bat like:
+echo.
+echo     init.bat /startNotepad
+echo.
+echo   Case 2:
+echo.
+echo   The following command in user-profile.cmd would execute "notepad.exe"
+echo.
+echo     call %%flag_exists%% NOT "/dontStartNotepad" "cmd /c start notepad.exe"
+echo.
+echo   UNLESS you pass parameter to init.bat like:
+echo.
+echo     init.bat /dontStartNotepad
+echo.
+exit /b