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1 #!/bin/bash
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2 # A v. 2.0 Debian package is nothing but an ar(1) archive that contains
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3 # three members:
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4 # 1. A debian-binary file containing the string "2.0" and a newline,
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5 # 2. A compressed tar archive with a name of control,
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6 # 3. A compressed tar archive with a name of data.
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7 # (See https://en.wikipedia.org/wiki/Deb_%28file_format%29.) Make one.
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8 #
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9 # There are other ways to do this, but they tend to be so complex and
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10 # badly-documented that I found it easier to just roll my own.
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11
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12 # Name executed as
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13 myname="${0##*/}"
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14
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15 # We must specify single directory name and an output file.
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16 if [ $# -ne 2 ]
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17 then
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18 1>&2 echo "$myname: expecting directory and output file"
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19 exit 2
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20 fi
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21
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22 # Change to the directory, die if we can't
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23 cd "$1" || exit 2
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24
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25 # Do some sanity checks.
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26 for i in data control
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27 do
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28 if [ ! -d "$i" ]
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29 then
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30 1>&2 echo "$myname: '$1/$i', no such directory"
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31 exit 2
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32 fi
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33 done
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34
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35 # If there is no debian-binary file, make one.
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36 dbin="debian-binary"
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37 if [ ! -e "$dbin" ]
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38 then
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39 1>&2 echo "$myname: warning - '$dbin' does not exist, creating it"
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40 echo "2.0" > "$dbin" || exit 1
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41 fi
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42
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43 # Remember where we are, and bail on errors
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44 set -e
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45
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46 # Process data
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47 cd data
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48 find * -type f -print0 | xargs -0 md5sum > ../control/md5sums
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49 tar -c -z --owner=0 --group=0 -f ../data.tar.gz *
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50
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51 # Process control
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52 cd ../control
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53 tar -c -z --owner=0 --group=0 -f ../control.tar.gz *
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54
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55 # Finally, make deb file
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56 cd ..
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57 ar r "$2" "$dbin" control.tar.gz data.tar.gz
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