Re: [gentoo-user] working with overlays

[Benno Schulenberg <benno.schulenberg@gmail.com>]

Bo Ørsted Andresen wrote:
> On Friday 22 December 2006 20:09, Benno Schulenberg wrote:
> > Bo once said (or was it someone else?) he
> > had such a script.  If so, Bo, please post the script.
>
> You may be referring to this post:
>
> http://thread.gmane.org/gmane.linux.gentoo.user/164432/focus=164437

Ah, yes.  Thanks.

Meanwhile my own script evolved a little further:

-----8<------------------------------------------
#!/bin/bash

# ovlay.sh  version 0.2

OVERLAY=/usr/local/portage
unset BUMP DELETE EDIT HELP NEWVERSION RENUMBER REST

if [[ -z $EDITOR ]]; then
	EDITOR="vim"
fi

for ARGUMENT in $*; do
	if [[ "$BUMP" == "take" ]]; then
		NEWVERSION="$ARGUMENT"
		BUMP="yes"
		continue
	fi
	case "$ARGUMENT" in
	"-b"|"--bump")		BUMP="take";;
	"-d"|"--delete")	DELETE="yes";;
	"-e"|"--edit")		EDIT="yes";;
	"-h"|"--help")		HELP="yes";;
	"-r"|"--renumber")	RENUMBER="yes";;
	*)			REST="$REST $ARGUMENT";;
	esac
done

# Redefine positional arguments:
set -- $REST

if [[ $HELP || -z "$1" ]]; then
	PROGRAM=${0##/[a-z]*/}
	echo "Usage:  $PROGRAM  [-e|--edit]  package_name  [patch_name...]"
	echo "        $PROGRAM  -d|--delete  package_name..."
	echo "        $PROGRAM  -b|--bump new_version_number  [-r|--renumber]  package_name"
	echo ""
	echo "Copies the latest ebuild of the specified package to the local overlay,"
	echo "and optionally allows you to bump it, insert patches, and edit it."
	exit 0
elif [[ "$BUMP" == "take" ]]; then
	echo "Specify a new version number."
	exit 2
elif [[ $RENUMBER && -z $BUMP ]]; then
	echo "Renumbering is only possible with version bumping."
	exit 2
fi

if [[ $DELETE ]]; then
	if [[ $BUMP || $EDIT || $RENUMBER ]]; then
		echo "Deletion does not go together with other options."
		exit 2
	fi
	while [[ "$1" ]]; do
		if ls -d /${OVERLAY}/*/$1 &>/dev/null; then
			rm -r /${OVERLAY}/*/$1
		else
			echo "There is no overlay for '$1'."
			exit 2
		fi
		shift
	done
	# Remove empty dirs (there must be a better way):
	ls -dl /${OVERLAY}/* | grep "x 2 root" | sed 's/.* //' |
		while read dir; do rmdir $dir; done
	exit 0
fi	

##shopt -s -o xtrace

EMERGEOUT="$(emerge -qOp $1 2>/dev/null)"
if [[ $? != 0 ]]; then
	EMERGEOUT="$(emerge -qOp =$1 2>/dev/null)"
	if [[ $? != 0 ]]; then
		echo "Package '$1' not found."
		exit 2
	fi
fi

NAMENUMBER=$(echo $EMERGEOUT | sed -e 's:^[^/]*\]::' -e 's:\[.*$::' -e 's: ::g')
CATPACK=${NAMENUMBER%%-[0-9]*}
PACKAGE=${NAMENUMBER##[a-z]*/}
FULLPATH=${OVERLAY}/${CATPACK}
NAME=${PACKAGE%%-[0-9]*}
VERSION=${PACKAGE##[a-z]*-}

if [[ $NAME != $1 && $PACKAGE != $1 ]]; then
	echo "*Internal error*: determination of package name is wrong."
	exit 4
fi

# When wanting to edit an already existing ebuild and not giving any further
# arguments, do not first recreate the ebuild, but just allow editting it:
if [[ $EDIT && -f /$FULLPATH/${PACKAGE}.ebuild && -z "$2" ]]; then
	vim /$FULLPATH/${PACKAGE}.ebuild
	ebuild ${FULLPATH}/${PACKAGE}.ebuild digest >/dev/null
	emerge -pqv =${PACKAGE}
	exit 0
fi

mkdir -p /${FULLPATH}
cp /usr/portage/${CATPACK}/${PACKAGE}.ebuild /${FULLPATH}/
cp -a /usr/portage/${CATPACK}/files /${FULLPATH}/

if [[ $BUMP ]]; then
	mv /${FULLPATH}/${PACKAGE}.ebuild /${FULLPATH}/${NAME}-${NEWVERSION}.ebuild
	if [[ $RENUMBER ]]; then
		# Renumber versioned patches:
		rename "${VERSION}" "${NEWVERSION}" /${FULLPATH}/files/*${VERSION}*
	fi
	PACKAGE=${NAME}-${NEWVERSION}
fi

# Insert any trailing arguments as patches:
if [[ "$2" ]]; then
	echo -e '\n\npost_src_unpack() { cd ${S}' >>/${FULLPATH}/${PACKAGE}.ebuild
	while [[ "$2" ]]; do
		if [[ ! -f $2 ]]; then
			echo "Patch file '$2' not found."
			exit 2
		fi
		cp $2 /${FULLPATH}/files/
		echo -e '\tepatch ${FILESDIR}/'$2 >>/${FULLPATH}/${PACKAGE}.ebuild
		shift
	done
	echo -e "}\n" >>/${FULLPATH}/${PACKAGE}.ebuild
fi

if [[ $EDIT ]]; then
	vim /$FULLPATH/${PACKAGE}.ebuild
fi

rm /$FULLPATH/files/digest-*

# Strangely this does not allow a double leading slash:
ebuild ${FULLPATH}/${PACKAGE}.ebuild digest >/dev/null

emerge -pqv =${PACKAGE}
-----8<------------------------------------------

Benno


-- 
Cetere mi opinias ke ne ĉio tradukenda estas.
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