remove zsync
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zawz
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1 changed files with 0 additions and 449 deletions
449
zsync/zsync
449
zsync/zsync
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@ -1,449 +0,0 @@
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#!/bin/sh
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##
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## NO T OPTION FOR RSYNC
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# globals
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syncdir=".zsync"
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lock_file=".zsync/lock"
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ignore_file=".zsync/ignore"
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tree_full=".zsync/tree_full"
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tree_hash=".zsync/tree_hash"
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config_file=".zsync/config"
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rsync_opts='-rvlpE'
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tmpdir=${TMPDIR-/tmp}
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# usage
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fname=$(basename "$0")
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usage()
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{
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echo "$fname [operation]
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Operations:
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server <server> Setup sync on current folder with server target
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run [file...] Run sync with server
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push [file...] Regular run but push all conflicts
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pull [file...] Regular run but pull all conflicts
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dry [file...] Run a simulated sync but do not perform any action
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drypush [file...] Dry run as push
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drypull [file...] Dry run as pull
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forcepush Push by force the entire tree. Will replace and delete remote files
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forcepull Pull by force the entire tree. Will replace and delete local files"
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}
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## generic tools
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# $@ = paths
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check_paths()
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{
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for N
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do
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echo "$N" | grep "^/" && echo "Path cannot start with /" >&2 && return 1
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echo "$N" | grep -w ".." && echo "Path cannot contain .." >&2 && return 1
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done
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return 0
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}
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tmpdir() {
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echo "$tmpdir/zsync_$(tr -dc '[:alnum:]' </dev/urandom | head -c20)"
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}
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## CONFIG
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init_config() {
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mkdir -p "$syncdir" || return 2
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which rsync >/dev/null 2>&1 || { echo rsync not installed on server >&2 ; return 3; }
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touch "$config_file" || return 5
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}
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get_server() {
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[ ! -f "$config_file" ] && return 1
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servconf=$(sed 's|^[ \t]*||g' "$config_file" | grep -E '^server[ \t]' | sed 's|^server[ \t]*||g' | tail -n1)
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raddr=$(echo "$servconf" | cut -d ':' -f1)
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rdir=$(echo "$servconf" | cut -d ':' -f2-)
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}
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# $1 = server arg
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setup_server()
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{
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init_config || return $?
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[ -z "$1" ] && echo "$fname server user@host:path" && return 1
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sed -i '/^[ \t]*server[ \t]/d' "$config_file"
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echo "server $1" >> "$config_file"
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}
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ignores=""
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get_ignores() {
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if [ -f "$ignore_file" ]
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then
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ignores="($(tr '\n' '|' < "$ignore_file"))"
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else
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ignores='(^$)'
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fi
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ignores=$(echo "$ignores" | sed ' s/|)/)/g ; s/^()$/^$/g ')
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}
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## LOCK
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lock_local() { touch "$lock_file"; }
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unlock_local() { rm "$lock_file"; }
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lock_server() { ssh "$raddr" "cd '$rdir' && touch '$lock_file'"; }
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unlock_server() { ssh "$raddr" "cd '$rdir' && rm '$lock_file'"; }
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lock_all() { lock_local && lock_server ; }
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unlock_all() { ret=0; unlock_local || ret=$? ; unlock_server || ret=$?; return $ret ; }
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local_lock_check() {
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[ ! -f "$lock_file" ] || { echo "Local sync locked, wait for sync completion" >&2 && return 1; }
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}
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server_lock_check() {
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ssh "$raddr" "cd '$rdir' && [ ! -f '$lock_file' ]" || { echo "Server is busy, wait for sync completion" >&2 && return 1; }
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}
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# init
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init_local() {
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mkdir -p "$syncdir" || return 2
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which rsync >/dev/null 2>&1 || { echo rsync not installed on server >&2 ; return 3; }
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local_lock_check || return 4
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touch "$lock_file" || return 5
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}
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init_server() {
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ssh "$raddr" "
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cd '$rdir' || exit 1
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mkdir -p '$syncdir' || exit 2
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which rsync >/dev/null 2>&1 || { echo rsync not installed on server >&2 ; exit 3; }
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[ -f '$lock_file' ] && { echo Server is busy, wait for sync completion ; exit 4; }
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touch '$lock_file' || exit 5
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"
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}
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## LIST GET
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local_hash_list()
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{
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{ ( set -e
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find . -type f ! -regex "^./$syncdir/.*" | sed 's|^./||g' | tr '\n' '\0' | xargs -0 md5sum | cut -c1-33,35- | grep -vE "$ignores"
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find . -type l | sed 's|^./||g' | while read -r ln
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do
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find "$ln" -maxdepth 0 -printf '%l' | md5sum | sed "s|-|$ln|g"
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done | cut -c1-33,35- | grep -vE "$ignores"
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) || return $?; } | sort
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}
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server_hash_list()
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{
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ssh "$raddr" "set -e
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cd '$rdir'
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find . -type f ! -regex '^./$syncdir/.*' | sed 's|^./||g' | tr '\n' '\0' | xargs -0 md5sum | cut -c1-33,35- | grep -vE '$ignores'
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find . -type l | sed 's|^./||g' | while read -r ln
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do
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find \"\$ln\" -maxdepth 0 -printf '%l' | md5sum | sed \"s|-|\$ln|g\"
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done | cut -c1-33,35- | grep -vE '$ignores'
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" | sort
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}
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local_full_list() {
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find . -mindepth 1 ! -regex "^./$syncdir\$" ! -regex "^./$syncdir/.*" | sed 's|^./||g' | grep -vE "$ignores" | sort
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}
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server_full_list() {
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ssh "$raddr" "set -e
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cd '$rdir'
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find . -mindepth 1 ! -regex '^./$syncdir\$' ! -regex '^./$syncdir/.*' | sed 's|^./||g' | grep -vE '$ignores'
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"| sort
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}
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write_lists()
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{
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local_full_list > "$tree_full"
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local_hash_list > "$tree_hash"
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}
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## FILTERS
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run_ignore() {
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[ -n "$ignores" ] && grep -vE "$ignores" "$@"
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}
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# $1 = regex , $@ = args
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grep_after_sum()
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{
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reg=$1
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shift 1
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grep --color=never -E "^[0-9a-f]{32} $reg" "$@"
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}
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# $@ = match these
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merge()
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{
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if [ $# -gt 0 ]
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then
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re="$1"
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shift 1
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for N
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do
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re="$re|$N"
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done
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grep -E "^($re)"
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return 0
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else # don't change input
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cat
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fi
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}
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reduce_list()
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{
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list="$(cat /dev/stdin)"
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I=1
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while true
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do
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ln=$(echo "$list" | sed -n "$I"p) # get nth line
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[ -z "$ln" ] && break
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list=$(echo "$list" | grep -v "^$ln/")
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I=$((I+1))
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done
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echo "$list"
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}
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## DIFFERENCES
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# find changes from list
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# $1 = list file , $@ = targets
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# requisite: file contains both hash and filename and is sorted
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list_diff()
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{
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file=$1
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shift 1
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[ ! -f "$tree_hash" ] && { cut -c34- "$file" ; return 0; }
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diff --old-line-format="" --unchanged-line-format="" "$tree_hash" "$file" | cut -c34- | merge "$@"
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}
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# find deleted from list
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# $1 = list file , $@ = targets
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# requisite: file contains only filename and is sorted
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get_deleted()
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{
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file=$1
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shift 1
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[ ! -f "$tree_full" ] && return 0
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diff --new-line-format="" --unchanged-line-format="" "$tree_full" "$file" | reduce_list | grep -vE "$ignores" | merge "$@"
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}
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## TRANSACTIONS
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# read list from stdin
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# $1 = dry mode
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send() {
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if [ "$1" = "dry" ]
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then
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echo "* files to send"
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cat
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else
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printf '* '
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rsync $rsync_opts --files-from=- --exclude=".zsync" -e ssh "$(pwd)" "$raddr:$rdir" || return $?
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fi
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}
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# read list from stdin
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# $1 = dry mode
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recieve() {
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if [ "$1" = "dry" ]
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then
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echo "* files to recieve"
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cat
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else
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printf '* '
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rsync $rsync_opts --files-from=- -e ssh "$raddr:$rdir" "$(pwd)" || return $?
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fi
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}
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# read list from stdin
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# $1 = dry mode
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delete_server() {
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if [ "$1" = "dry" ]
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then
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echo "* deleted to send"
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cat
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else
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echo "* sending deleted"
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ssh "$raddr" "cd '$rdir' || exit 1
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trashutil='gio trash'
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which trash-put >/dev/null 2>&1 && trashutil=trash-put
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while read -r ln
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do
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\$trashutil \"\$ln\" && echo \"\$ln\" || exit \$?
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done
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" || return $?
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fi
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}
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# read delete from stdin
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# $1 = dry mode
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delete_local() {
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if [ "$1" = "dry" ]
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then
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echo "* deleted to recieve"
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cat
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else
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echo "* recieving deleted"
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trashutil='gio trash'
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which trash-put >/dev/null 2>&1 && trashutil=trash-put
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while read -r ln
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do
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$trashutil "$ln" && echo "$ln" || return $?
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done
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fi
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}
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forcepull()
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{
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local ret=0
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get_server || return $?
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init_local || return $?
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init_server || { unlock_local ; return $?; }
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rsync $rsync_opts -r --delete -e ssh "$raddr:$rdir" "$(pwd)/." || ret=$?
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unlock_all
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write_lists
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return $ret
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}
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forcepush()
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{
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local ret=0
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get_server || return $?
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init_local || return $?
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init_server || { unlock_local ; return $?; }
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rsync $rsync_opts -r --delete -e ssh "$(pwd)/." "$raddr:$rdir" || ret=$?
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unlock_all
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write_lists
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return $ret
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}
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# $1 = method (null/'push'/'pull') , $2 = dry (null/'dry') , $@ = files
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sync()
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{
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method=$1
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dry=$2
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shift 2
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check_paths "$@" || return $?
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get_server || { echo "Server not configured on this instance" >&2 && return 1; }
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get_ignores
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# init and check local
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init_local || return $?
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# init, check, and lock server
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init_server || {
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ret=$?
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unlock_local
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return $ret
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}
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tdir=$(tmpdir)
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mkdir -p "$tdir"
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local_full_list > "$tdir/local_full"
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local_hash_list > "$tdir/local_hash"
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server_full_list > "$tdir/server_full"
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server_hash_list > "$tdir/server_hash"
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# get changed on both sides
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local_newer=$( list_diff "$tdir/local_hash" "$@") || { rm -rf "$tdir" ; unlock_all ; return 1; }
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server_newer=$(list_diff "$tdir/server_hash" "$@") || { rm -rf "$tdir" ; unlock_all ; return 1; }
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# get deleted on both sides
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deleted_local=$( get_deleted "$tdir/local_full" "$@") || { rm -rf "$tdir" ; unlock_all ; return 1; }
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deleted_server=$(get_deleted "$tdir/server_full" "$@") || { rm -rf "$tdir" ; unlock_all ; return 1; }
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# get collisions
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collisions=$(printf "%s\n%s\n" "$local_newer" "$server_newer" | sort | uniq -d)
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[ -n "$collisions" ] && [ "$method" != push ] && [ "$method" != pull ] && {
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echo "-- There are file collisions" >&2
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echo "$collisions"
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rm -rf "$tdir"
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unlock_all
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return 100
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}
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# remove collisions from opposing method
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[ -n "$collisions" ] && {
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if [ "$method" = "pull" ]
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then
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local_newer=$(printf "%s\n%s\n" "$collisions" "$local_newer" | sort | uniq -u)
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else
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server_newer=$(printf "%s\n%s\n" "$collisions" "$server_newer" | sort | uniq -u)
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fi
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}
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if [ -n "$local_newer" ] || [ -n "$server_newer" ] || [ -n "$deleted_local" ] || [ -n "$deleted_server" ]
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then
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# operations
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if [ "$method" = "pull" ]
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then
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[ -n "$server_newer" ] && echo "$server_newer" | recieve "$dry"
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[ -n "$local_newer" ] && echo "$local_newer" | send "$dry"
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else
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[ -n "$local_newer" ] && echo "$local_newer" | send "$dry"
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[ -n "$server_newer" ] && echo "$server_newer" | recieve "$dry"
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fi
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# delete has no impact on timestamps
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[ -n "$deleted_local" ] && echo "$deleted_local" | delete_server "$dry"
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[ -n "$deleted_server" ] && echo "$deleted_server" | delete_local "$dry"
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# real run
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[ "$dry" != "dry" ] && {
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# update lists
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write_lists
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}
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fi
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rm -rf "$tdir"
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unlock_all
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}
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which rsync >/dev/null || { echo "rsync not installed" >&2 && exit 1; }
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# options
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unset arg_c
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while getopts ":hC:" opt;
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do
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case $opt in
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C)
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[ -z "$OPTARG" ] && echo "Option -C requires an argument" >&2 && exit 1
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arg_c="$OPTARG"
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;;
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h) usage && exit 1 ;;
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\?) echo "Unknown option: $OPTARG" >&2 && usage && exit 1 ;;
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esac
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done
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shift $((OPTIND-1))
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# raddr=zawz@zawz.net
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# rdir=sync/tmp
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[ -f "$server_file" ] && get_server
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# preprocess
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[ -n "$arg_c" ] && { cd "$arg_c" || exit $?; } # -C opt
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[ $# -lt 1 ] && usage && exit 1
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arg=$1
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shift 1
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# actions
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case $arg in
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server) setup_server "$@" ;;
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run) sync "" "" "$@" ;;
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pull) sync pull "" "$@" ;;
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push) sync push "" "$@" ;;
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dry) sync "" dry "$@" ;;
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drypush) sync push dry "$@" ;;
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drypull) sync pull dry "$@" ;;
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forcepush) forcepush ;;
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forcepull) forcepull ;;
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*) usage && exit 1 ;;
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esac
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