rsync unknown filter rule merge -


i'm writing script using rsync synchronize 2 local folders. i'm building rsync command variables, set depending on whether .sync-filter file exists or not.

here's sync function:

function sync {     from="$1"     to="$2"     local filter_file=${from%/}"/.sync-filter"     local filter=""     if [[ -f ${filter_file} ]] ;         filter="--filter='merge ${filter_file}'"     fi     cmd="rsync -a --delete ${filter} ${from} ${to}"     `$cmd`     sleep 1 }

the result in terminal when running script:

execute command: rsync -a --delete --filter='merge ./.sync-filter' --exclude-from=./.sync-exclude . ../dst unknown filter rule: `'merge' rsync error: syntax or usage error (code 1) @ exclude.c(904) [client=3.1.1]

if manually run command, works no error.

anyone has clue?

after having same problem clue:

rsync expects (at least) filter-arg of command in own "argv" representation.

the bash-shell distinguishs following:

short test t.sh:

#!/bin/bash echo $1 echo $2 echo $3

test 1:

./t.sh b c

results in:

a b c

test 2:

./t.sh "a b" c

results in:

a b c

the called program (here t.sh) gets args in different way. question: rsync seems expect '--filter=...' in 1 "argv", means 1 argument in program.

i solved problem adding different parts of args further '"'. way first implementation should like:

cmd='rsync -a --delete "${filter}" ${from} ${to}'

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