Disable user plugin when the same artifact is a dev dependency in lein.bat.

bin/lein.bat

@@ -26,19 +26,15 @@ if "%ORIGINAL_PWD:~-1%x" == "\x" set "ORIGINAL_PWD=%ORIGINAL_PWD%\"
 call :FIND_DIR_CONTAINING_UPWARDS project.clj
 if "%DIR_CONTAINING%" neq "" cd "%DIR_CONTAINING%"
 
-set LEIN_PLUGINS="
+
+set DEV_PLUGINS="
 for %%j in (".\lib\dev\*.jar") do (
-    set LEIN_PLUGINS=!LEIN_PLUGINS!;%%~fj
+    set DEV_PLUGINS=!DEV_PLUGINS!;%%~fj
 )
-set LEIN_PLUGINS=!LEIN_PLUGINS!"
+set DEV_PLUGINS=!DEV_PLUGINS!"
 
-set LEIN_USER_PLUGINS="
-for %%j in ("%LEIN_HOME%\plugins\*.jar") do (
-    set LEIN_USER_PLUGINS=!LEIN_USER_PLUGINS!;%%~fj
-)
-set LEIN_USER_PLUGINS=!LEIN_USER_PLUGINS!"
-
-set CLASSPATH="%CLASSPATH%";%LEIN_USER_PLUGINS%;%LEIN_PLUGINS%;test;src
+call :BUILD_UNIQUE_USER_PLUGINS
+set CLASSPATH="%CLASSPATH%";%DEV_PLUGINS%;%UNIQUE_USER_PLUGINS%;test;src
 
 rem Apply context specific CLASSPATH entries
 set CONTEXT_CP=""
@@ -81,6 +77,61 @@ set CLOJURE_JAR=%USERPROFILE%\.m2\repository\org\clojure\clojure\1.2.1\clojure-1
 goto RUN
 
 
+rem Builds a classpath fragment consisting of user plugins
+rem which aren't already present as a dev dependency.
+:BUILD_UNIQUE_USER_PLUGINS
+call :BUILD_PLUGIN_SEARCH_STRING %DEV_PLUGINS%
+set UNIQUE_USER_PLUGINS="
+for %%j in ("%LEIN_HOME%\plugins\*.jar") do (
+    call :MAKE_SEARCH_TOKEN %%~nj
+    echo %PLUGIN_SEARCH_STRING%|findstr ;!SEARCH_TOKEN!; > NUL
+    if !ERRORLEVEL! == 1 (
+        set UNIQUE_USER_PLUGINS=!UNIQUE_USER_PLUGINS!;%%~fj
+    )
+)
+set UNIQUE_USER_PLUGINS=!UNIQUE_USER_PLUGINS!"
+goto :EOF
+
+rem Builds a search string to match against when ensuring
+rem plugin uniqueness.
+:BUILD_PLUGIN_SEARCH_STRING
+for %%j in (".\lib\dev\*.jar") do (
+    call :MAKE_SEARCH_TOKEN %%~nj
+    set PLUGIN_SEARCH_STRING=!PLUGIN_SEARCH_STRING!;!SEARCH_TOKEN!
+)
+set PLUGIN_SEARCH_STRING=%PLUGIN_SEARCH_STRING%;
+goto :EOF
+
+rem Takes a jar filename and returns a reversed jar name without version.
+rem Example: lein-multi-0.1.1.jar -> itlum-niel
+:MAKE_SEARCH_TOKEN
+call :REVERSE_STRING %1
+call :STRIP_VERSION !RSTRING!
+set SEARCH_TOKEN=!VERSIONLESS!
+goto :EOF
+
+rem Reverses a string.
+:REVERSE_STRING
+set NUM=0
+set INPUTSTR=%1
+set RSTRING=
+:REVERSE_STRING_LOOP
+call set TMPCHR=%%INPUTSTR:~%NUM%,1%%%
+set /A NUM+=1
+if not "x%TMPCHR%" == "x" (
+    set RSTRING=%TMPCHR%%RSTRING%
+    goto REVERSE_STRING_LOOP
+)
+goto :EOF
+
+rem Takes a string and removes everything from the beginning up to
+rem and including the first dash character.
+:STRIP_VERSION
+set INPUT=%1
+for /F "delims=- tokens=1*" %%a in ("%INPUT%") do set VERSIONLESS=%%b
+goto :EOF
+
+
 :NO_LEIN_JAR
 echo.
 echo %LEIN_JAR% can not be found.