22. scommit

NOTE : Korn shell /bin/ksh is got by installing pdksh*.rpm from Linux contrib cdrom

Save this file as text file and chmod a+rx on it.

#!/bin/ksh

# CVS program scommit
# Program to commit the changes and check in the file into CVS

# Every filename is composed of 3 parts - Home directory, sub-directory 
# and the filename. The full-path is $HOME/$subdir/$fname
# And in CVS the same directory structure is maintained (by 
# variable $subdir) therefore in cvs we will have $CVSROOT/$subdir/$fname
# In this program these 4 variables $HOME, $CVSROOT, $subdir and $fname
# play an important role. For example, sample values can be like
# HOME=/home/aldev, subdir=myproject/src CVSROOT=/home/cvsroot 
# and fname=foo.cpp

# Caution: Put double-quotes to protect the variables having 
#          spaces, like "$HOME/$subdir" if subdir is 'some foo.cpp'

cmdname=`basename $0`

Usage()
{
        print "\nUsage: $cmdname [-r revision_number] <filename>"
        print "The options -r are optional "
        print "For example - "
        print " $cmdname -r 1.1 foo.cpp"
        print " $cmdname foo.cpp "
        print " "
}

# Command getopt will not supported in next major release.
# Use getopts instead.
while getopts r: ii
do
        case $ii in
        r) FLAG1=$ii; OARG1="$OPTARG";;
        ?) Usage; exit 2;;
        esac
done
shift ` expr $OPTIND - 1 `

#echo FLAG1 = $FLAG1 , OARG1 = $OARG1

if [ $# -lt 1 ]; then
        Usage
        exit 2
fi

if [ -d $1 ]; then
        Usage
        exit 2
fi

homedir=` echo $HOME | cut -f1 -d' '  `
if [ "$homedir" = "" ]; then
        print "\nError: \$HOME is not set!!\n"
        exit
fi

# Find sub-directory
cur_dir=`pwd`
#echo $cur_dir
len=${#homedir}
len=$(($len + 2))
#echo $len

subdir=` echo $cur_dir | cut -b $len-2000 `
tmpaa=`dirname $1`
if [ "$tmpaa" = "." ]; then
        fname=$1
        if [ "$subdir" = "" ]; then
                subdir=$tmpaa
        fi
else
        fname=`basename $1`
        if [ "$subdir" = "" ]; then
                subdir=$tmpaa
        else
                subdir="$subdir/$tmpaa"
        fi
fi
# echo "subdir is : " $subdir
# echo "fname is : " $fname

# If file is already checked out by another user....
cvs_root=` echo $CVSROOT | cut -f1 -d' '  `
if [ "$cvs_root" = "" ]; then
        print "\nError: \$CVSROOT is not set!!\n"
        exit
fi
mkdir -p "$CVSROOT/$subdir/Locks" 2>/dev/null

# CVS directory in your local directory is required for all commands..
if [ ! -d  "$homedir/$subdir/CVS" ]; then
        tmpaa=` (cd "$CVSROOT/$subdir"; find * -prune -type f -print | head -1 ) `
        tmpbb=`basename $tmpaa | cut -d',' -f1 `
        if [ "$tmpaa" = "" -o ! -f "$CVSROOT/$subdir/$tmpbb,v" ]; then
                print "\nThe directory $homedir/$subdir/CVS does not exist"
                print "You must do a sget on `basename $subdir` directory. Give -"
                print "       cd $homedir/`dirname $subdir` "
                print "       sget `basename $subdir` "
                exit
        else
                # Now try to create CVS in local dir by sget
                (
                        cd "$homedir"
                        if [ "$subdir" = "." ]; then  # don't use dot, will mess up cvs
                                cvs -r checkout -A $tmpbb
                        else
                                cvs -r checkout -A "$subdir/$tmpbb"
                        fi
                )
        fi
fi

# Get the working revision number of the file....
# Use tmpfile as the arg cannot be set inside the sub-shell
tmpfile=$homedir/sedit-lock.tmp
\rm -f $tmpfile 2>/dev/null
if [ "$FLAG1" = "" ]; then
        (
        cd $homedir
                if [ "$subdir" = "." ]; then  # don't use dot, will mess up cvs
                        cvs status $fname 2>/dev/null | grep "Working revision:" | awk '{print $3}' >$tmpfile
                else
                        cvs status "$subdir/$fname" 2>/dev/null | grep "Working revision:" | awk '{print $3}' >$tmpfile
                fi
        )
        OARG1=`cat $tmpfile`
        \rm -f $tmpfile 2>/dev/null
fi

if [ "$OARG1" = "" ]; then
        print "The file $subdir/$fname is NEW, it is not in the CVS repository"
else
        lockfile="$CVSROOT/$subdir/Locks/$fname-$OARG1"

        if [ -e $lockfile ]; then
                # Check if this revision is owned by you...
                aa=` ls -l $lockfile | awk '{print $3}' `
                userid=`id | cut -d'(' -f2 | cut -d')' -f1 `
                if [ "$aa" != "$userid" ]; then
                        print " "
                        print "The file $subdir/$fname is NOT locked by you!!"
                        print "It is locked by unix user name $aa and your login name is $userid"
#                       print "If you are working concurrently with other developer"
#                       print "and you used -F option with sedit."
                        print "You need to wait untill other developer does scommit"
                        print "or sunlock"
                        print "Aborting the $cmdname ...."
                        print " "
                        exit 2
                fi
        else
                # The file must exist in cvs 
                if [ -f "$CVSROOT/$subdir/$fname,v" ]; then
                        print "You did not lock the file $subdir/$fname with sedit!!"
                        print "Aborting the $cmdname ...."
                        exit 2
                else
                        print "\nThe file $subdir/$fname does not exist in CVS repository yet!!"
                        print "You should have done sadd on $subdir/$fname ...."
                        exit 2
                fi
        fi
fi

# Operate inside sub-shell - and operate from root directory
(
        cd $homedir

        # Do not allow directory commits for now ...
        #if [ -d "$subdir/$fname" ]; then
        #       cvs commit "$subdir/$fname"
        #fi

        if [ "$subdir" = "." ]; then  # don't use dot, will mess up cvs
                cvs commit $fname
        else
                cvs commit "$subdir/$fname"
        fi
        exit_status=$?

        if [ $exit_status -eq 0 ]; then
                lockfile="$CVSROOT/$subdir/Locks/$fname-$OARG1"
                if [ -e $lockfile ]; then
                        \rm -f $lockfile
                fi

                # Must change the permissions on file in case
                # there are no changes to file
                chmod a-w "$HOME/$subdir/$fname"
                print "\nDone $cmdname. $cmdname successful"
                #print "\nTip (Usage): $cmdname <filename/directory name>\n"
        fi
)