:<<"::CMDLITERAL"
@ECHO OFF
GOTO :CMDSCRIPT
::CMDLITERAL

echo -n Finding git revision...
gitrev="$(git describe --always --dirty --tags 2>/dev/null)"
echo ${gitrev}

gitrev_num="$(git describe --always 2>/dev/null)"

echo -n Finding number of git commits...
gitnum_commits="$(git rev-list --count HEAD 2>/dev/null)"
echo ${gitnum_commits}

gitrev_dirty=0
if [ ! "${gitrev}" ]; then
	gitrev_num=0
elif [ ! "${gitrev_num}" ]; then
	case "${gitrev}" in
		*-dirty)
		gitrev_dirty=1
	esac
	gitrev_num="${gitrev//-dirty}"
else
	case "${gitrev}" in
		*-dirty)
		gitrev_dirty=1
	esac
fi

if [ -n "${gitrev}" ]; then
	version="git-${gitrev}"
else
	version="unknown"
fi

IFS=, read -r cyear cyr cmonth cdoy cday chour cmin csec <<EOF
$(git show --pretty="format:%cd" --no-patch --date="format:%#Y,%#y,%#m,%#j,%#d,%#H,%#M,%#S")
EOF
IFS=, read -r year yr month doy day hour min sec <<EOF
$(date +%#Y,%#y,%#m,%#j,%#d,%#H,%#M,%#S)
EOF

cat >../Core/Inc/config.h <<EOF
/* config.h - autogenerated at build-time -- do not edit */

#ifndef _CONFIG_H_
#define _CONFIG_H_

/* Git */
#define GIT (1)
#define GIT_REV "${gitrev}"
#define GIT_REV_NUMERIC (0x${gitrev_num})
#define GIT_REV_DIRTY (${gitrev_dirty})
#define GIT_NUM_COMMITS (${gitnum_commits})

#define SCM_VERSION "${version}"

/* Commit Date & Time */
#define COMMIT_YEAR (${cyear})
#define COMMIT_YR (${cyr})
#define COMMIT_MONTH (${cmonth})
#define COMMIT_DOY (${cdoy})
#define COMMIT_DAY (${cday})
#define COMMIT_HOUR (${chour})
#define COMMIT_MINUTE (${cmin})
#define COMMIT_SECOND (${csec})

/* Build Date & Time */
#define BUILD_YEAR (${year})
#define BUILD_YR ($(expr $year % 100))
#define BUILD_MONTH (${month})
#define BUILD_DOY (${doy})
#define BUILD_DAY (${day})
#define BUILD_HOUR (${hour})
#define BUILD_MINUTE (${min})
#define BUILD_SECOND (${sec})

#endif /* _CONFIG_H_ */
EOF

exit $?

:CMDSCRIPT
SETLOCAL EnableDelayedExpansion
REM Store a newline in this variable.
REM N.B.: The two blank lines are necessary!
SET _NL=^


REM Find Git revision and append '-dirty' if there are uncommitted changes.
<NUL set /p _dummy=Finding git revision...
FOR /F "USEBACKQ tokens=*" %%a IN (`git describe --always --dirty --tags 2^> NUL`) DO (
	SET "gitrev=%%a"
)
ECHO  "%gitrev%"

FOR /F "USEBACKQ tokens=*" %%a IN (`git describe --always`) DO (
	SET "gitrev_num=%%a"
	SET "gitrev_dirty=0"
)

REM Find number of Git commits.
<NUL set /p _dummy=Finding number of git commits...
FOR /F "USEBACKQ tokens=*" %%a IN (`git rev-list --count HEAD 2^> NUL`) DO (
	SET "gitnum_commits=%%a"
)
ECHO  "%gitnum_commits%"

REM Store the revision in a version variable and prepend the SCM.
IF NOT "x%gitrev%" == "x" (
	SET "version=git-%gitrev%"
) ELSE (
	SET "version=unknown"
)
ECHO Set version="%version%"

REM Set numerical and dirty bits appropriately.
REM For git:
IF "x%gitrev%" == "x" (
	SET "gitrev_num=0"
	SET "gitrev_dirty=0"
) ELSE IF "x%gitrev_num%" == "x" (
	IF NOT "x!gitrev:-dirty=!" == "x%gitrev%" (
		SET "gitrev_dirty=1"
	) ELSE (
		SET "gitrev_dirty=0"
	)
	SET "gitrev_num=%gitrev:-dirty=%"
) ELSE (
	IF NOT "x!gitrev:-dirty=!" == "x%gitrev%" (
		SET "gitrev_dirty=1"
	) ELSE (
		SET "gitrev_dirty=0"
	)
)

REM Commit Date Information
IF "x%gitrev%" neq "x" (
	<NUL set /p _dummy=Finding git commit date and time...
	FOR /F "USEBACKQ tokens=1-8 delims=^," %%m IN (`git show --pretty^="format:%%cd" --no-patch --date^="format:%%#Y,%%#y,%%#m,%%#j,%%#d,%%#H,%%#M,%%#S" 2^> NUL`) DO (
		SET "cyear=%%m"
		SET "cyr=%%n"
		SET "cmonth=%%o"
		SET "cdoy=%%p"
		SET "cday=%%q"
		SET "chour=%%r"
		SET "cmin=%%s"
		SET "csec=%%t"
	)
	ECHO "!cyear!/!cmonth!/!cday! !chour!:!cmin!:!csec!"
)

REM Build Date Information
<NUL set /p _dummy=Finding build date and time...
SET /A i=0, sum=0
REM accumulate day-offSETs for every month in %accum[1...12]%
for %%a in (31 28 31 30 31 30 31 31 30 31 30 31) do (
   SET /A i+=1
   SET /A accum[!i!]=sum, sum+=%%a
)

REM apply date value from date command
REM date is locale-specific!
FOR /F "USEBACKQ tokens=2-4 delims=/ " %%a IN (`DATE /T 2^> NUL`) DO (
	SET "CurrDate=%%c%%b%%a"
)
REM WMIC retrieves current system date/time in standardized format;
REM parse its output by FOR /F, then store it in %CurrDate%
FOR /F "USEBACKQ tokens=2 delims==" %%a IN (`wmic OS GET LocalDateTime /VALUE 2^> NUL ^| FIND "=" 2^> NUL`) DO (
	SET "CurrDate=%%a"
)

REM extract %year%, %month%, and %day%
SET /A year=1%CurrDate:~0,4%-10000, month=1%CurrDate:~4,2%-100, day=1%CurrDate:~6,2%-100
REM extract %hour%, %minute%, and %second%
SET /A hour=1%CurrDate:~8,2%-100, minute=1%CurrDate:~10,2%-100, second=1%CurrDate:~12,2%-100
REM compute several moduli needed for determining whether year is leap year
SET /A yearMOD4=%CurrDate:~0,4% %% 4
SET /A yearMOD100=%CurrDate:~0,4% %% 100, yearMOD400=%CurrDate:~0,4% %% 400
REM calculate %dayOfYear% as it were not a leap year
SET /A dayOfYear=!accum[%month%]!+day
REM adapt %dayOfYear% only in case %month% is past February (29th)
IF %month% gtr 2 (
    REM check for leap year and adapt %dayOfYear% accordingly
    IF %yearMOD4% equ 0 SET /A dayOfYear+=1
    IF %yearMOD400% neq 0 IF %yearMOD100% equ 0 SET /A dayOfYear-=1
)
REM return result
set "y0=000%year%"
set "n0=0%month%"
set "d0=0%day%"
set "h0=0%hour%"
set "m0=0%minute%"
set "s0=0%second%"
echo "!y0:~-4!/!n0:~-2!/!d0:~-2! !h0:~-2!:!m0:~-2!:!s0:~-2!"

REM Fill in the blanks.
SET config=/* config.h - autogenerated at build-time -- do not edit */!_NL!^
!_NL!^
#ifndef _CONFIG_H_!_NL!^
#define _CONFIG_H_!_NL!^
!_NL!^
/* Git */
IF "x%gitrev%" == "x" SET config=!config!!_NL!^#undef GIT!_NL!^


IF NOT "x%gitrev%" == "x" SET config=!config!!_NL!^#define GIT (1)!_NL!^
#define GIT_REV "%gitrev%"!_NL!^
#define GIT_REV_NUMERIC (0x%gitrev_num%)!_NL!^
#define GIT_REV_DIRTY (%gitrev_dirty%)!_NL!^
#define GIT_NUM_COMMITS (%gitnum_commits%)!_NL!^


SET config=!config!#define SCM_VERSION "%version%"!_NL!^
!_NL!^
/* Commit Date ^& Time */!_NL!^
#define COMMIT_YEAR (%cyear%)!_NL!^
#define COMMIT_YR (%cyr%)!_NL!^
#define COMMIT_MONTH (%cmonth%)!_NL!^
#define COMMIT_DOY (%cdoy%)!_NL!^
#define COMMIT_DAY (%cday%)!_NL!^
#define COMMIT_HOUR (%chour%)!_NL!^
#define COMMIT_MINUTE (%cmin%)!_NL!^
#define COMMIT_SECOND (%csec%)!_NL!^
!_NL!^
/* Build Date ^& Time */!_NL!^
#define BUILD_YEAR (%year%)!_NL!^
#define BUILD_YR (%yearMOD100%)!_NL!^
#define BUILD_MONTH (%month%)!_NL!^
#define BUILD_DOY (%dayOfYear%)!_NL!^
#define BUILD_DAY (%day%)!_NL!^
#define BUILD_HOUR (%hour%)!_NL!^
#define BUILD_MINUTE (%minute%)!_NL!^
#define BUILD_SECOND (%second%)!_NL!^
!_NL!^
#endif /* _CONFIG_H_ */

echo !config! > ..\Core\Inc\config.h