bash file globbing anomaly -

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the bash manual (i'm using version 4.3.42 on osx) states vertical bar '|' character used separator multiple file patterns in file globbing. thus, following should work on system:

projectfiles=./config/**/*|./support/**/*

however, second pattern gives "permission denied" on last file in directory structure pattern never resolved projectfiles. i've tried variations on this, including wrapping patterns in parentheses, 

projectfiles=(./config/**/*)|(./support/**/*)

which laid out in manual, doesn't work either.

any suggestions on i'm doing wrong?

you're referring part in man bash:

   if extglob shell option enabled using shopt builtin, several    extended pattern matching operators recognized.  in   following    description, pattern-list list of 1 or more patterns separated    |.  composite patterns may formed using 1 or more of fol-    lowing sub-patterns:            ?(pattern-list)                  matches 0 or 1 occurrence of given patterns           *(pattern-list)                  matches 0 or more occurrences of given patterns           +(pattern-list)                  matches 1 or more occurrences of given patterns           @(pattern-list)                  matches 1 of given patterns           !(pattern-list)                  matches except 1 of given patterns

the | separator works in pattern-lists explained, when extglob enabled:

shopt -s extglob

try this:

projectfiles=*(./config/**/*|./support/**/*)

as @broslow pointed out in comment:

note can without extglob, ./{config,support}/**/*, expand path config , path support space delimited , pattern matching. or ./@(config|support)/**/* extglob. either of seems cleaner.

@chepner's comment worth mentioning:

also, globbing isn't performed @ during simple assignment; try foo=*, compare echo "$foo" echo $foo. globbing occur during array assignment; see foo=(*); echo "${foo[@]}"


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