rsync-sstate

#!/bin/bash
set -e

die()
{
    echo >&2 "ERROR: $*"
    exit 1
}

usage()
{
    cat <<EOF
Usage: $(basename $0) [options] ../sstates/"

Options:
    --prune                remove local shared-state files not on server (rsync --delete)
    --gen <sstate-gen>     sstate generation to fetch (default '$GEN')
    --repo <rsync-path>    source sstates repository
    --help                 guess what
EOF
}

die_usage()
{
    echo >&2 "ERROR: $*"
    usage
    exit 1
}

GITTOP=$(git rev-parse --show-toplevel)
[ -r "$GITTOP" ] || die "failed to locate git toplevel, cannot read '$GITTOP'"
[ -r "$GITTOP/.gitlab-ci.yml" ] || die "failed to locate git toplevel, cannot read '$GITTOP/.gitlab-ci.yml'"

# defaults before config and cli parsing

EXTRAFLAGS=()
GEN=$(grep BUILD_GEN .gitlab-ci.yml | sed 's/ *BUILD_GEN: *"\(.*\)"/\1/')

# config file

for conffile in "$GITTOP/.gitlab-oe.conf" ~/.gitlab-oe.conf; do
    [ -r "$conffile" ] || continue
    . "$conffile"
    break # only use the first existing config
done

# comand line

while [ $# -gt 0 ]; do
    case "$1" in
        --gen) GEN="$2"; shift ;;
        --prune) EXTRAFLAGS+=(--delete) ;;
        --repo) REPO="$2"; shift ;;
        --help) usage; exit 0 ;;
        *) break ;;
    esac
    shift
done

[ $# = 1 ] || die_usage "exactly one argument expected"
DEST="$1"

[ -n "$GEN" ] || die "cannot determine sstate generation"

# core

SSTATE="${REPO}/sstate-cache-${GEN}"

BASEGEN=${GEN}
SSTATES="$SSTATE"
while true; do
    case "$BASEGEN" in
        *+*)
            BASEGEN=${BASEGEN%+*}
            BASESSTATE="${REPO}/sstate-cache-${BASEGEN}"
            SSTATES="$BASESSTATE $SSTATES"
            ;;
        *)
            break
            ;;
    esac
done

rsync --rsh "ssh -p 1023" -aHv \
      "${EXTRAFLAGS[@]}" \
      $SSTATES "$DEST"