dpkg and LFS

[Andrew Elian]

Hello all,

I've just finished off LFS 6.8 with dpkg 1.15.8.10 as the package
manager.  It's my pet project, although using dpkg does add another layer of
complexity.  Over the course of doing this, I created a shell script to help out
with runtime dependencies and would like to share it with you.  I figure
that there's an outside chance someone else might get some use out of
it.  Of course, suggestions are always welcome.

---*---*---

#!/bin/sh
set -e

# dep.sh: Shell script to help out with dependencies
# Created by Andrew Elian <e_lio...@hotmail.com>
# 
# Copyright ???? Who'd want to copy this anyway ???? 2010
# Okay, then GPL it is.
#
# There are *official* debian tools which look like they do the same thing.
# Hmmm.  Might have to look into those
# 
# Needs a DEPFILE, dpkg and the usual command line tools
# to work correctly
#
# DEPFILE is a flat text file with the listing of
# deb packages installed and their respective deb dep
# eg. essential-files_0.1_amd64.deb: essential-files (= 0.1)

DEPFILE="/usr/share/dLFS/Dependencies"

if [ $1 = "-h" ]; then
      echo "dep.sh, the dpkg dependency finder version 0.3"
      echo "Finds all runtime dependencies in current directory: dep.sh"
      echo "Finds all runtime dependencies of app or shared object: dep.sh foo"
      exit 0
fi

if  [ "$1" = "" ]; then
  echo "Finding shared libs and executables"
  process=$(
    for A in $(find . | xargs file |grep -e "executable" -e "shared" | grep ELF 
| cut -f 1 -d:)
      do
        objdump -p $A |
        grep NEEDED |
        cut -d ' ' -f 18 # Use just the name
    done
  )
else
  process=$(objdump -p "$1" |grep NEEDED | cut -d ' ' -f 18)
fi

# Find which packages the libs and executables belong to
results(){
for package in $process
  do                                                                            
                                           
    dpkg -S $package |                                                          
                                           
      cut -d: -f1 |
        sort -u >> /tmp/dep-tempfile.1
  done
}

# Get the dep part from Dependencies
compare(){
for C in $(sort -u /tmp/dep-tempfile.1)
  do
    grep -i "${C}_" $DEPFILE |
      grep -v '#' | # ignore lines with hash marks - are comments
        cut -d : -f 2 >> /tmp/dep-tempfile.2
  done
}

# Tidy up the output. sed adds a comma, xargs puts it into one line 
# and then sed takes just the last comma off
output(){
sed 's/)/),/' /tmp/dep-tempfile.2 | xargs | sed 's/\(.*\)./\1/'
}

clean(){
  rm /tmp/dep-tempfile.1 /tmp/dep-tempfile.2
}

### Main Program ###
echo "Getting Results"
results
echo "Comparing against $DEPFILE"
compare
echo
output
echo
echo "Cleaning up"
clean
echo "All Done!"

---*---*---

Cheers,
ae
-- 
My Blog: http://elian001.wordpress.com
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