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|
#!/bin/sh
# git-annex external special remote program
#
# This is basically the same as git-annex's built-in directory special remote.
#
# Install in PATH as git-annex-remote-directorya
#
# Copyright 2013 Joey Hess; licenced under the GNU GPL version 3 or higher.
set -e
# This program speaks a line-based protocol on stdin and stdout.
# When running any commands, their stdout should be redirected to stderr
# (or /dev/null) to avoid messing up the protocol.
runcmd () {
"$@" >&2
}
# Gets a value from the remote's configuration, and stores it in RET
getconfig () {
echo GETCONFIG "$1"
read resp
set -- $resp
case "$1" in
VALUE)
RET="$2"
;;
*)
RET=""
;;
esac
}
# Sets LOC to the location to use to store a key.
mylocation () {
echo HASHDIR "$1"
read resp
set -- $resp
case "$1" in
VALUE)
LOC="$hashdir/$1"
;;
*)
LOC=
;;
esac
}
echo VERSION 1
while read line; do
set -- $line
case "$1" in
INITREMOTE)
# XXX do anything necessary to create resources
# used by the remote. Try to be idempotent.
# Use GETCONFIG to get any needed configuration
# settings, and SETCONFIG to set any persistent
# configuration settings.
getconfig directory
mydirectory="$RET"
if [ -z "$mydirectory" ]; then
echo INITREMOTE-FAILURE "You need to set directory="
else
mkdir -p "$mydirectory"
echo INITREMOTE-SUCCESS
fi
;;
PREPARE)
# XXX Use GETCONFIG to get configuration settings,
# and do anything needed to get ready for using the
# special remote here.
getconfig directory
mydirectory="$RET"
echo PREPARE-SUCCESS
;;
TRANSFER)
key="$3"
file="$4"
case "$2" in
STORE)
# XXX upload file here
# XXX when possible, send PROGRESS
calclocation "$key"
mkdir -p "$(dirname "$LOC")"
runcmd cp -v "$file" "$LOC"
echo TRANSFER-SUCCESS STORE "$key"
;;
RETRIEVE)
# XXX download file here
calclocation "$key"
runcmd cp -v "$LOC" "$file"
echo TRANSFER-SUCCESS RETRIEVE "$key"
;;
esac
;;
CHECKPRESENT)
key="$2"
calclocation "$key"
if [ -e "$LOC" ]; then
echo CHECKPRESENT-SUCCESS "$key"
else
if [ -d "$mydirectory" ]; then
echo CHECKPRESENT-FAILURE "$key"
else
# If the directory does not exist,
# the remote is not available.
# (A network remote would similarly
# fail with CHECKPRESENT-UNKNOWN
# if it couldn't be contacted).
echo CHECKPRESENT-UNKNOWN "$key" "this remote is not currently available"
fi
fi
;;
REMOVE)
key="$2"
calclocation "$key"
# Note that it's not a failure to remove a
# key that is not present, so -f is used.
runcmd rm -f "$LOC"
echo REMOVE-SUCCESS "$key"
;;
*)
# The requests listed above are all the ones
# that are required to be supported, so it's fine
# to say that any other request is unsupported.
echo UNSUPPORTED-REQUEST
;;
esac
done
# XXX anything that needs to be done at shutdown can be done here
|
