GitHash.bat

I'm writing a little batch script to create a C header containing the current git commit hash.

the bottom `echo CommitID_U >>Header` line is not working.

I'm trying to capitalize the hash, and then append the hash to a previously echo'd line without an interveneing newline, and despite trying to disable delayed expansion and reenable it and do every trick I can think of, nothing is working.

code:

    @ECHO OFF

    SETLOCAL EnableExtensions
    SETLOCAL EnableDelayedExpansion

    SET Header=%~dp0..\Library\include\Private\CommitID.h

    echo !Header!

    echo|set /p="#define Version_CommitID " >!Header!

    FOR /F %%A IN ('git branch --show-current') DO SET GitBranch=%%A

    FOR /F %%A IN ('git rev-parse !GitBranch!') DO SET CommitID=%%A

    SET CommitID_U=!CommitID!
    CALL :HexUpper CommitID_U
    echo !CommitID_U!
    GOTO:EOF

    :HexUpper
    FOR %%i IN ("0=0" "1=1" "2=2" "3=3" "4=4" "5=5" "6=6" "7=7" "8=8" "9=9" "a=A" "b=B" "c=C" "d=D" "e=E" "f=F") DO CALL SET "%1=%%%1:%%~i%%"
    GOTO:EOF

    echo !CommitID_U! >>!Header!

    ENDLOCAL