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scripts/populate: add -m option, to merge source and dest

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Merge the source rootfs into the (pre-existing) destination rootfs,
and populate the result accordingly.
This commit is contained in:
Yann E. MORIN" 2010-03-24 22:36:51 +01:00
parent ceca768ee6
commit a67a23877f
1 changed files with 27 additions and 9 deletions
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36
scripts/populate.in
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@ -61,6 +61,18 @@ OPTIONS
-f force execution: if destination directory already exists, it will be
removed first; if a specified library (above) was not found, continue.
Note: if using -m and the destination directory already exists, it
is *not* removed, see below.
-m Merge the source root directory with the destination root directory.
If the latter does not exist, it is created, and -m is ignored.
If the destination droot directory exists, then the content of the
source root directory is copied in there, and the result is populated
as usual.
It can be usefull if constructing a rootfs incrementally from many
smaller source root directories, or if your destination root directory
is an NFS export that your target mounts as / (and you don't want to
re-run exportfs -av everytime). USE WITH CARE!
-v Be verbose. By default, populate is absolutely silent.
@ -71,10 +83,11 @@ CT_ROOT_SRC_DIR=
CT_ROOT_DST_DIR=
CT_LIB_LIST=
CT_LIB_FILE=
CT_FORCE=no
CT_MERGE=
CT_FORCE=
CT_PRINTF=:
OPTIND=1
while getopts ":s:d:r:l:L:fvh" CT_OPT; do
while getopts ":s:d:r:l:L:fmvh" CT_OPT; do
case "${CT_OPT}" in
s) CT_ROOT_SRC_DIR="${OPTARG}";;
d) CT_ROOT_DST_DIR="${OPTARG}";;
@ -82,6 +95,7 @@ while getopts ":s:d:r:l:L:fvh" CT_OPT; do
l) CT_LIB_LIST="${CT_LIB_LIST}:${OPTARG}";;
L) CT_LIB_FILE="${OPTARG}";;
f) CT_FORCE=y;;
m) CT_MERGE=y;;
v) CT_PRINTF=printf;;
h) doHelp
exit 0
@ -108,9 +122,16 @@ if [ ! -d "${CT_SYSROOT_DIR}" ]; then
echo "$myname: '${CT_SYSROOT_DIR}': no such file or directory"
exit 1
fi
if [ -d "${CT_ROOT_DST_DIR}" -a "${CT_FORCE}" != "y" ]; then
echo "$myname: '${CT_ROOT_DST_DIR}': already exists"
exit 1
# If the dest dir does not exist, all is well
# If merging, we accept an existing dest directory
# If forcing and not merging, we remove an exiting dest directory
# If not forcing and not merging, we do not accept an exiting dest directory
if [ -d "${CT_ROOT_DST_DIR}" ]; then
case "${CT_FORCE}:${CT_MERGE}" in
*:y) ;;
y:) rm -rf "${CT_ROOT_DST_DIR}";;
:) echo "$myname: '${CT_ROOT_DST_DIR}': already exists" && exit 1 ;;
esac
fi
src_inode=$(stat -c '%i' "${CT_ROOT_SRC_DIR}/.")
dst_inode=$(stat -c '%i' "${CT_ROOT_DST_DIR}/." 2>/dev/null || true)
@ -125,10 +146,7 @@ if [ -n "${CT_LIB_FILE}" -a ! \( -f "${CT_LIB_FILE}" -a -r "${CT_LIB_FILE}" \) ]
exit 1
fi
# Get rid of potentially older destination directory
rm -rf "${CT_ROOT_DST_DIR}"
# Create the working copy
# Create the working copy, no issue if already existing
mkdir -p "${CT_ROOT_DST_DIR}"
# Make all path absolute