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#!/bin/bash -e
export TMPDIR="`mktemp -d --tmpdir pbs-absrepo-convert.XXXXXXXXXX`"
cleanup() {
msg "$(gettext "Removing temporary files...")"
echo rm -rf "$TMPDIR"
}
trap cleanup EXIT
. /usr/bin/libremessages
abort() {
echo # force a fresh line
error "$(gettext "Aborting...")"
cleanup
}
_collect-data-gc() {
local base=$1
local files=`echo $base.new*`
cat -- $files 2>>/dev/null | sort -u > $base.tmp
rm -f -- $files
mv $base.tmp $base.new
}
collect-data-gc() {(
cd "$TMPDIR"
while [[ ! -f collect-data-filter-branch.done ]]; do
_collect-data-gc packages
_collect-data-gc repo-arch
sleep 10
done
mv packages.new packages
mv repo-arch.new repo-arch
rm -f collect-data-filter-branch.done
)}
##
# Usage: collect-data
# Assumptions:
# - currently in a working copy of the repo
# - git branch "master" exists and is untouched
# - TMPDIR is set and exists
# Effects:
# - creates file "${TMPDIR}/packages"
# - creates file "${TMPDIR}/repo-arch"
# - creates file "${TMPDIR}/architectures"
##
collect-data() {
msg "$(gettext "Collecting package data...")"
[[ $# = 0 ]] || { usage; return 1; }
collect-data-gc &
git filter-branch --tree-filter pbs-absrepo-convert--list master
# notify collect-data-gc that filter-branch is done
touch "${TMPDIR}/collect-data-filter-branch.done"
# wait for collect-data-gc to finish
while [[ ! -f "${TMPDIR}/packages" ]]; do
sleep 10;
done
# extract some data from those files
{
echo master
< "${TMPDIR}/repo-arch" sed -e 's/.*/-/' -e '/^any$/d'
} | sort -u > "${TMPDIR}/architectures"
}
##
# Usage: convert-package SOURCE PACKAGE
# Assumptions:
# - currently in a working copy of the repo
# - TMPDIR is set
# Effects:
# - creates git branch "packages/${SOURCE}/${PACKAGE}"
# - creates file "${TMPDIR}/packages-${PACKAGE}.commits"
# Side effects:
# - changes git working tree
# - prints output of git commands
##
convert-package() {
[[ $# = 2 ]] || { usage; return 1; }
local source=$1
local package=$2
local branch="packages/${source}/${package}"
local dir
if git checkout "packages/${package}" &>/dev/null; then
# special case (common; optimization)
git checkout -b "$branch"
git branch -D "packages/${package}"
dir=trunk
else
# general case (uncommon)
git checkout -b "$branch" orig
dir="${package}/trunk"
fi
git filter-branch -f --prune-empty --subdirectory-filter "$dir" "$branch"
git log --pretty=format:'%T %H' > "${TMPDIR}/packages-${package}.commits"
}
##
# Usage: convert-packages SOURCE
# Assumptions:
# - meets assumptions of `convert-package`
# - TMPDIR is set
# - file "${TMPDIR}/packages" contains a newline-separated list of packages
# Effects:
# - runs `convert-package` for every package listed in "${TMPDIR}/packages"
# - prints status updates about what it is doing
##
convert-packages() {
msg "$(gettext "Converting packages...")"
[[ $# = 1 ]] || { usage; return 1; }
local source=$1
local count="$(wc -l < "${TMPDIR}/packages")"
cat -n "${TMPDIR}/packages" | while read n package; do
msg2 "$(gettext "(%d/%d) %s")" "$n" "$count" "$package"
convert-package "$source" "$package"
done
}
##
# Usage: convert-arch ARCH
# Assumptions:
# - currently in a working copy of the repo
# Effects:
# - creates git branch "${ARCH}"
# Side effects:
# - changes git working tree
# - prints output of git commands
##
convert-arch() {
[[ $# = 1 ]] || { usage; return 1; }
local arch=$1
git checkout orig
git checkout -b "$arch"
git filter-branch -f --tree-filter \
"pbs-absrepo-convert--treefilter $arch" "$arch"
}
##
# Usage: convert-arches
# Assumptions:
# - meets assumptions of `convert-arch`
# - file "${TMPDIR}/architectures" contains a newline-separated list of arches
# - file "${TMPDIR}/packages-${PACKAGE}.commits" exists for every package
# Effects:
# - runs `convert-arch` for every arch listed in "${TMPDIR}/architectures"
# - prints status updates about what it is doing
##
convert-arches() {
msg "$(gettext "Converting architectures...")"
[[ $# = 0 ]] || { usage; return 1; }
local count="$(wc -l < "${TMPDIR}/architectures")"
cat -n "${TMPDIR}/architectures" | while read n arch; do
msg2 "$(gettext "(%d/%d) %s")" "$n" "$count" "$arch"
convert-arch "$arch"
done
}
main() {
trap abort EXIT
[[ $# = 1 ]] || { usage; return 1; }
local source=$1
local cachedir="$(pbs-plumb-config get core.cachedir)"
local sourcedir="$(pbs-plumb-config get core.sourcedir)"
# init #################################################################
msg "$(gettext "Creating working copy...")"
git clone "${cachedir}/${source}.git" "${TMPDIR}/repo"
cd "${TMPDIR}/repo"
git checkout -b orig
git checkout master
collect-data
git branch -D master
# main #################################################################
convert-packages "$source"
convert-arches "$source"
# save results #########################################################
msg "$(gettext "Copying into source directory...")"
[[ -d "$sourcedir" ]] || mkdir -p "$sourcedir"
git clone --mirror "${TMPDIR}/repo" "${sourcedir}/${source}.new.git"
if [[ -d "${sourcedir}/${source}.git" ]]; then
mv "${sourcedir}/${source}"{,.old}.git
fi
mv "${sourcedir}/${source}"{.new,}.git
if [[ ! -d "${sourcedir}/${source}.old.git" ]]; then
rm -rf "${sourcedir}/${source}".old.git
fi
trap cleanup EXIT
}
main "$@"
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