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====== git cvsimport ==

The old [[cvs]] repository for Crossfire can be accessed using the git-cvsimport Perl script. \\
git-cvsimport is usually located in the {prefix}/libexec/git-core/ directory.

Basic syntax is :
  git cvsimport $GIT_CVSIMPORT_OPTS -C $module -o $module \
  -d:pserver:anonymous@crossfire.cvs.sourceforge.net:/cvsroot/crossfire $module
Where $module is one of the many arch, maps, crossfire (server), client .

===== Prerequisites ==
The git-cvsimport script should install with the normal git ''make install'' . \\
Then it needs cvs installed. 

Besides these above two it needs the separate **cvsps** binary installed. \\
CVSPS can be found for example at packages.debian.org 's search for filenames containing cvsps.

The cvsps source is comparatively small at around 60KB with only a simple Makefile. \\
''make && make install'' should install the cvsps binary by default to /usr/local(/bin) .
 

===== Script ==
Bash script to import and create a git archive for the many cvs modules for Crossfire. \\
The script assumes to be placed inside the same directory as the directory 'git_cvsimport' . \\
The folder git_cvsimport will not be created by this script, the user has to do it manually. 

The **cvsps** binary output gets written to a /tmp/gitXXXXXX.cvsps text file. \\
If a complete /tmp/gitXXXXXX.cvsps could be secured, it can be used to continue downloads \\
without re-run of the slow rlog part of the cobe by git-cvsimport using the **-P** option. 

<code bash>
#!/bin/ash

ERROR=${ERROR:=1}
ERR=${ERR:-$ERROR} #ERR var already used as /dev/null OR /dev/stderr
_err(){
test "$ERROR" || return 0
echo -e "$0:ERROR:$*"  >&2
}

_exit(){
local RV
test "$*" || { _err "Usage:_exit EXITCODE MESSAGE"; }
RV=$1
[ "${RV//[[:digit:]]/}" ] && { _err "\$1 must be a digit number."; RV=255; } || shift
echo "$*" >&2
case ${MY_SELF##*/} in
ash*|bash*|sh*) return $RV;;
*) exit $RV;;
esac
}

#GIT_CVSIMPORT_OPTS="-R -v -p Z9,v -P ../gitc45EwN.cvsps"
GIT_CVSIMPORT_OPTS="-R -v -p Z9,v"
MAX_RETRIES=10

MY_SELF=`realpath "$0"`
MY_DIR=${MY_SELF%/*}
cd "$MY_DIR" || _exit 3 "Could not change into '$MY_DIR'/ ."

cd git_cvsimport || _exit 3 "Could not change into folder git_cvsimport/ ."


#trap "pidof cvsps && kill -2 `pidof cvsps`" INT

for d in CVSROOT CFJavaEditor arch client iso_arch \
 alternate_images cfclient_sdl crossfire jxclient \
 maps maps-bigworld sounds
do mkdir $VERB -p $d
done

MODULES=`ls -1`
test "$MODULES" || _exit 3 "No cvs modules available."

# MAIN CODE
for module in $MODULES

do

test -d "$module" || continue

# don't run rlog on already checked out 
#( and therefore downloaded ) folders
echo                        #DEBUG
echo '# ================== #'
echo $module/               #DEBUG
echo                        #DEBUG
ls -1A $module/ | head -n10 #DEBUG
echo                        #DEBUG
ls -1A $module/ | tail -n10 #DEBUG

test "`ls -1A $module/ | wc -l`" -le 1 || continue #if only a .git folder, continue download

 c=0
 while :; do

 git cvsimport $GIT_CVSIMPORT_OPTS -C $module -o $module \
  -d:pserver:anonymous@crossfire.cvs.sourceforge.net:/cvsroot/crossfire $module

 RV=$?
 test $RV = 0 && break 1
 echo Returnvalue $RV #DEBUG

 echo '# ================== #'
 c=$((c+1))
 test $c -ge ${MAX_RETRIES:-10} && break 1
 sleep 12

 if test $RV = 255; then #perl die() always returns 255
  unset SIZE_GIT
  SIZE_GIT=`du -s -BKiB $module/.git | awk '{print $1}' | grep -o -E '[0-9]+'`
  SIZE_GIT=${SIZE_GIT:-501}
  if test "$SIZE_GIT" -le 500; then
  rm -rf $module/.git  || break 2
  fi
 fi
 
 echo "$MY_SELF: Retrying..."
 done

sleep 12

done

_say_some_code(){
cat >&1 <<EoI

/* gitsrc/builtin/rev-parse.c */
static void die_no_single_rev(int quiet)
{
	if (quiet)
		exit(1);
	else
		die("Needed a single revision");
}
EoI
}
</code>
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