179 lines
5.7 KiB
Bash
179 lines
5.7 KiB
Bash
# $Id$
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# Acknowledgment:
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# The following code is a modified version of an original work written by
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# Greg Schafer for the "DIY Linux" project and is included here with his
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# permission.
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# ref: http://www.diy-linux.org
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#
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#
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# ---------------------------------------------------------------------------- #
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# Here are the ICA functions.
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# ---------------------------------------------------------------------------- #
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#
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# Here we prepare for the Iterative Comparison Analysis (ICA). Essentially, we
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# copy most of our chroot phase files to a new location then perform some
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# manipulations on the copied files to make diff comparisons easier. The steps
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# involved are:-
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# (1) copy the whole tree (minus the PRUNEPATH defined below) to the CMP_DIR
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# location. Use tar as it seems like the most appropriate tool for copying
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# large directory trees around.
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# (2) delete all symlinks.
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# (3) gunzip all `*.gz' files.
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# (4) delete all hardlinked files (of course trying to leaving the "master"
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# intact)
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# (5) convert all `*.a' files (ar archives) into a directory of the same name
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# containing the unpacked object files.
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# (6) fully strip the whole lot (but being careful to strip only the debug
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# symbols from object `*.o' files).
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#----------------------------------#
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do_ica_prep() { #
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#----------------------------------#
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: <<inline_doc
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desc:
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usage:
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input vars:
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externals: --
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modifies: --
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returns: --
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on error:
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on success:
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inline_doc
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local CMP_DIR F L BN
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local ALL_FILES=/tmp/allfiles.$$
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local UNIQUE_FILES=/tmp/uniquefiles.$$
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local PRUNEPATH="$TT_PFX $PATCHES_DIR $SCRATCH_DIR $TARBALLS_DIR \
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/dev /home /mnt /proc /root /sys /tmp /usr/src /lost+found"
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if [ ! -f "${STAMP_DIR}/icaprep" ]; then
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CMP_DIR="${SCRATCH_DIR}/cmp/iter${ITER}"
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test -d "$CMP_DIR" || mkdir -p $CMP_DIR
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echo -e "\n${BORDER}\n${CYAN}[ICA] - starting ICA preparation for\c"
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echo -e " Iteration ${ITER}.${OFF}\n"
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# Create a file that we can pass to tar as an "exclude list".
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# There might be an easier way to achieve tar exclusions? Strip
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# the leading /.
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for F in $PRUNEPATH; do
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echo ${F#*/} >> $TMP_FILE
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done
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echo -n "Copying files to ${CMP_DIR}... "
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cd /
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tar -X $TMP_FILE -cf - . | tar -C $CMP_DIR -xf - || {
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echo -e "\n\n${RED}ERROR:${OFF} tar copy failed!\n" >&2
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exit 1
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}
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echo "done."
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rm -f $TMP_FILE
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echo -n "Removing symbolic links in ${CMP_DIR}... "
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find $CMP_DIR -type l | xargs rm -f
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echo "done."
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echo -n "Gunzipping \".gz\" files in ${CMP_DIR}... "
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find $CMP_DIR -name '*.gz' | xargs gunzip
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echo "done."
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# This was a bit tricky. You'll probably have to do it by hand
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# to see what's actually going on. The "sort/uniq" part is
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# inspired from the example DirCmp script from the book "Shell
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# Programming Examples" by Bruce Blinn, published by Prentice
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# Hall. We are essentially using the `-ls' option of the find
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# utility to allow manipulations based on inode numbers.
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#
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# FIXME - this is a bit unreliable - rem out for now
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#echo -n "Removing hardlinked file copies in ${CMP_DIR}... "
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#find $CMP_DIR -ls | sort -n > $ALL_FILES
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#find $CMP_DIR -ls | sort -n -u > $UNIQUE_FILES
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#cat $UNIQUE_FILES $ALL_FILES | sort | uniq -u | awk '{ print $11 }' | xargs rm -f
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#rm -f $ALL_FILES $UNIQUE_FILES
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#echo "done."
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# ar archives contain date & time stamp info that causes us
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# grief when trying to find differences. Here we perform some
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# hackery to allow easy diffing. Essentially, replace each
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# archive with a dir of the same name and extract the object
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# files from the archive into this dir. Despite their names,
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# libieee.a & libmcheck.a are not actual ar archives.
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#
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echo -n "Extracting object files from \".a\" files in ${CMP_DIR}... "
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L=$(find $CMP_DIR -name '*.a' ! -name 'libieee.a' ! -name 'libmcheck.a')
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for F in $L; do
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mv $F ${F}.XX
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mkdir $F
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cd $F
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BN=${F##*/}
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ar x ../${BN}.XX || {
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echo -e "\n\n${RED}ERROR:${OFF} ar archive extraction failed!\n" >&2
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exit 1
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}
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rm -f ../${BN}.XX
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done
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echo "done."
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echo -n "Stripping (debug) symbols from \".o\" files in ${CMP_DIR}... "
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find $CMP_DIR -name '*.o' | xargs strip -p -g 2>/dev/null
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echo "done."
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echo -n "Stripping (all) symbols from files OTHER THAN \".o\" files in ${CMP_DIR}... "
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find $CMP_DIR ! -name '*.o' | xargs strip -p 2>/dev/null || :
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echo "done."
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echo -e "\n${CYAN}[ICA] - ICA preparation for Iteration ${ITER}\c"
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echo -e " complete.${OFF}\n${BORDER}"
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do_stamp icaprep
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fi
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}
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#----------------------------------#
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do_ica_work() { # Do the ICA grunt work.
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#----------------------------------#
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: <<inline_doc
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desc:
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usage: do_ica_work 1 2
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do_ica_work 2 3
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input vars: $1 iteration number to use
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$2 iteration number to use
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externals: --
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modifies: --
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returns: --
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on error:
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on success:
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inline_doc
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local ICA_DIR="${SCRATCH_DIR}/cmp"
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local RAWDIFF=/tmp/rawdiff.$$
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local REPORT="${SCRATCH_DIR}/logs/REPORT.${1}V${2}"
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cd $ICA_DIR
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echo -n "Diffing iter${1} and iter${2}... "
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diff -ur iter${1} iter${2} > $RAWDIFF || :
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echo "done."
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echo -e "The list of binary files that differ:\n" > $REPORT
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grep "iles.*differ$" $RAWDIFF >> $REPORT
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echo -e "\n" >> $REPORT
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echo -e "The list of files that exist \"only in\" 1 of the directories:\n" >> $REPORT
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if grep "^Only in" $RAWDIFF >/dev/null 2>&1; then
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grep "^Only in" $RAWDIFF >> $REPORT
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else
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echo NONE >> $REPORT
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fi
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grep -v "iles.*differ$" $RAWDIFF | grep -v "^Only in" > ${SCRATCH_DIR}/logs/${1}V${2}.ASCII.DIFF
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rm -f $RAWDIFF
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}
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