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Sat, 20 Nov 2021 20:46:53 -0800 (PST) MIME-Version: 1.0 From: Zach Riggle Date: Sat, 20 Nov 2021 22:46:42 -0600 Message-ID: Subject: Setting GLOB_DOTS for a single command To: Zsh Users Content-Type: multipart/alternative; boundary="000000000000763a6105d1453222" X-Seq: 27354 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: --000000000000763a6105d1453222 Content-Type: text/plain; charset="UTF-8" Hello all! I recently learned about GLOB_DOTS, which is pretty useful in some scenarios, e.g. echo *(md-1) To show all files modified within the last day. However, in some cases I want to see hidden files (e.g. ./.foo) as well. The globdots option is excellent for this! Is there an easy way to set this for a single expression? I know I can use a function / anonymous function combined with LOCAL_OPTIONS to get this, but I wondered if there's something more clever. show() { setopt | grep glob } echo ----- Before ----- show (){ setopt globdots echo ----- Inside ----- show setopt localoptions } echo ----- After ----- show I expect that there's something I can do for scripts that I fully control, to declare some function ('globdots') which is invoked with noglob, and can then internally set the flag, and then trigger expansion of each argument in "$@". globdots() { setopt globdots local arguments=( $@ ) # TODO: Force filename expansion on each item in ${@} or ${arguments[@]} "${arguments[@]}" setopt localoptions } touch .hidden_file # Does NOT show .hidden_file ls -1d *(md-1) # DOES show .hidden_file noglob globdots ls -1d *(md-1) However, I'm not sure what portion of Section 14 (Expansion) to read to figure out how that works. It initially looked like the (e) flag (per 14.3.2.22) would do this, but it doesn't appear to. I can just invoke "eval" on something that I KNOW will be a glob expression to get it to expand, but blindly calling eval will execute things that are NOT glob expressions, and I only want filename expansion. What I have found that DOES work (but overkill and a hack) is just to shell out to zsh again, while passing in all options that are currently set -- plus globdots. () { set -x yo() { local myopts=( $(setopt) globdots ) local myargs=() local arg for arg in "$@"; do myargs+=( "$(zsh -c "setopt $o &>/dev/null; command echo $arg" )" ) done "${myargs[@]}" } touch .hidden_file noglob yo echo *hidden*(mm-1) } This of course is wasteful, and I expect there's a better solution. Then there's also the issue of causing filename expansion to occur when unintended -- for example, if '*' is indeed just a string argument, and should not be subject to expansion. I think this corner case I can ignore, as any user will explicitly be asking for glob expansion. *Finally, I wanted to say that I genuinely appreciate the help and answers I've gotten from this community. You're all very welcoming, experienced, and get down to the point / answers quickly. If there's any way that I can help support Zsh development or the community around it, please let me know.* *Zach Riggle* --000000000000763a6105d1453222 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello all!

I recently learned abou= t GLOB_DOTS, which is pretty useful in some scenarios, e.g.

<= /div>
<= div>echo *(md-1)

To show all files modifie= d within the last day.=C2=A0 However, in some cases I want to see hidden fi= les (e.g. ./.foo) as well.=C2=A0 The globdots=C2=A0option is excellent for = this!

Is there an easy way to set this for a singl= e expression?

I know I can use a function / anonym= ous function combined with=C2=A0LOCAL_OPTIONS to get this, but I wondered i= f there's something more clever.

=C2=A0 =C2=A0= show() {
=C2=A0 =C2=A0 =C2=A0 =C2=A0 setopt | grep glob
=C2=A0 =C2= =A0 }

=C2=A0 =C2=A0 echo ----- Before -----
=C2=A0 =C2=A0 show
=C2=A0 =C2=A0 (){
=C2=A0 =C2=A0 =C2=A0 =C2=A0 setopt globdots
= =C2=A0 =C2=A0 =C2=A0 =C2=A0 echo ----- Inside -----
=C2=A0 =C2=A0 =C2=A0= =C2=A0 show
=C2=A0 =C2=A0 =C2=A0 =C2=A0 setopt localoptions
=C2=A0 = =C2=A0 }

=C2=A0 =C2=A0 echo ----- After -----
=C2=A0 =C2=A0 show<= br>

I expect that there's something I can do f= or scripts that I fully control, to declare some function ('globdots= 9;) which is invoked with=C2=A0noglob, and can then internally set the flag= , and then trigger expansion of each argument in "$@".=C2=A0=C2= =A0

=C2=A0 =C2=A0 globdots() {
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 setopt globdots
=C2=A0 =C2=A0 =C2=A0 =C2=A0 local argu= ments=3D( $@ ) # TODO: Force filename expansion on each item in ${@} or ${a= rguments[@]}
=C2=A0 =C2=A0 =C2=A0 =C2=A0 "${arguments[@]}"
= =C2=A0 =C2=A0 =C2=A0 =C2=A0 setopt localoptions
=C2=A0 =C2=A0 }

= =C2=A0 =C2=A0 touch .hidden_file

=C2=A0 =C2=A0 # Does NOT show .hidd= en_file
=C2=A0 =C2=A0 ls -1d *(md-1)

=C2=A0 =C2=A0 # DOES show .h= idden_file
=C2=A0 =C2=A0 noglob globdots ls -1d *(md-1)
=

However, I'm not sure what portio= n of Section 14 (Expansion) to read to figure out how that works.=C2=A0 It = initially looked like the (e) flag (per 14.3.2.22) would do this, but it do= esn't appear to.=C2=A0=C2=A0

I can just invoke= "eval" on something that I KNOW will be a glob expression to get= it to expand, but blindly calling eval will execute things that are NOT gl= ob expressions, and I only want filename expansion.

What I have found that DOES work (but overkill and a hack) is just to she= ll out to zsh again, while passing in all options that are currently set --= plus globdots.

=C2=A0 =C2=A0 () {
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 set -x
=C2=A0 =C2=A0 =C2=A0 =C2=A0 yo() {
=C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 local myopts=3D( $(setopt) globdots )=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 local myargs=3D()
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 local arg
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 for arg in "$@"; do
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 myargs+=3D( "$(zsh -c "setopt $o &= ;>/dev/null; command echo $arg" )" )
=C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 done
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 &quo= t;${myargs[@]}"
=C2=A0 =C2=A0 =C2=A0 =C2=A0 }
=C2=A0 =C2=A0 =C2= =A0 =C2=A0 touch .hidden_file
=C2=A0 =C2=A0 =C2=A0 =C2=A0 noglob yo echo= *hidden*(mm-1)
=C2=A0 =C2=A0 }

This of course is wasteful, and I expec= t there's a better solution.

Then there's also the issue of causing filename expansion to = occur when unintended -- for example, if '*' is indeed just a strin= g argument, and should not be subject to expansion.=C2=A0 I think this corn= er case I can ignore, as any user will explicitly be asking for glob expans= ion.

Finally, I wanted to say that I genuinely appreciate t= he help and answers I've gotten from this community.=C2=A0 You're a= ll very welcoming, experienced, and get down to the point / answers quickly= .=C2=A0 If there's any way that I can help support Zsh development or t= he community around it, please let me know.

Zach Riggle<= br>
--000000000000763a6105d1453222--