Ticket title is 'Unable to set pool property self_heal to exclude,rebuild'
Status is 'In Progress'
https://daosio.atlassian.net/browse/DAOS-17659

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Thanks a lot for the quick responses, everyone.

This patch doesn't feel right---hope I'm not misleading:

• The , does not require escaping as far as the shell is concerned.
• The shell removes the escaping before our code sees the arguments. (See my Python experiment below. I also tried C just in case Python is too smart, but I got the same result.)
• We need to document (in dmg help or man page?) what syntaxes are supported for setting pool property self_heal.
• The unit test doesn't reflect the real inputs from the shell.

% python -c 'import sys; print(sys.argv)' a b=c d=e,f g='h i' j='k,l' n=o\,p 
['-c', 'a', 'b=c', 'd=e,f', 'g=h i', 'j=k,l', 'n=o,p']

Yeah, after applying this patch, I got the same errors when setting self_heal to exclude,rebuild:

bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude
pool set-prop succeeded
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude,rebuild
ERROR: dmg: invalid property "rebuild" (must be key:val)
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:'exclude,rebuild'
ERROR: dmg: invalid property "rebuild" (must be key:val)
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude\,rebuild
ERROR: dmg: invalid property "rebuild" (must be key:val)

This worked, however:

bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:\'exclude,rebuild\'
pool set-prop succeeded

Sounds like the set-prop syntax design [<key:val[,key:val...]>] doesn't work well with the self_heal value syntax design flag0[,flag1...].

Yeah, after applying this patch, I got the same errors when setting self_heal to exclude,rebuild:

bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude
pool set-prop succeeded
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude,rebuild
ERROR: dmg: invalid property "rebuild" (must be key:val)
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:'exclude,rebuild'
ERROR: dmg: invalid property "rebuild" (must be key:val)
bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:exclude\,rebuild
ERROR: dmg: invalid property "rebuild" (must be key:val)

This worked, however:

bash-5.1$ ~/daos/install/bin/dmg -o ~/daos_control.yml -i pool set-prop p0 self_heal:\'exclude,rebuild\'
pool set-prop succeeded

Sounds like the set-prop syntax design [<key:val[,key:val...]>] doesn't work well with the self_heal value syntax design flag0[,flag1...].

If escaping single or double quotes isn't acceptable should the parser check if the option following the comma matches compatible flag name? try match keyval else try match flag? what do you think?

If escaping single or double quotes isn't acceptable should the parser check if the option following the comma matches compatible flag name? try match keyval else try match flag? what do you think?

Could we use some other set of characters to wrap the values (maybe [])? Otherwise, like @liw said, it feels like we made a design mistake somewhere along the line.

I'm not completely against users having to escape the quotes, but they may find it a bit annoying (and hard to figure out what they did wrong if they don't escape them).

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