zsrhc hash directories only if they exist; add ~systemd

[crpb]

• Why? On *BSD you won't have any need for ~linux, ~deb, ~systemd nor
  will ~slog or ~www exist on every system.

[mika]

Hm, no real objections from my side about the ~systemd one, just curious why you're looking for adding this one? :)
(I e.g. sometimes need /var/lib/systemd/coredump and always have to recall its location :p)

Wondering whether the explicit test for the directories (slightly) increases runtime during execution, or if that's something we can certainly ignore. But I understand your reasoning, directories don't necessarily exist on all systems, while i I still would like to be able to type cd ~www even if it doesn't exist because it clearly state so, but not sure that's only me? :)

nitpick: please fix s/zsrhc/zshrc:/ in the commit message, so we don't skip this during release process by mistake then :)

@ft @zeha @jkirk what do you think?

[crpb]

cd ~www

well, there is cd ~www-data as the user will also be hashed

[mika]

cd ~www

well, there is cd ~www-data as the user will also be hashed

Hm:

mika@corazon ~ % cd ~www
cd:cd:6: no such file or directory: /var/www
1 mika@corazon ~ % cd ~www-data
cd:cd:6: no such file or directory: /var/www

vs

mika@web01 ~ % cd ~www     
mika@web01 ~www % pwd
/var/www
mika@web01 ~www % cd
mika@web01 ~ % cd ~www-data
mika@web01 ~www % pwd
/var/www

Is there any problem I'm missing? 🤔

[crpb]

Is there any problem I'm missing? 🤔

install nginx/lighttpd/apache/whatever and the directoy will magically be created i heard :-)

afs /var/www i guess thats postinst scripts..

[mika]

Is there any problem I'm missing? 🤔

install nginx/lighttpd/apache/whatever and the directoy will magically be created i heard :-)

afs /var/www i guess thats postinst scripts..

Sorry, can you please rephrase that, I don't understand what you mean :(

FTR, on my web01 system /var/www exists, as well as www-data user:

mika@web01 ~ % getent passwd www-data 
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin

[ft]

I don't mind the patch itself. In my config I have a function that does something like that.

With this applied, however, does the reference card still generate correctly?

[crpb]

With this applied, however, does the reference card still generate correctly?

this lead me to #225 🤣 where i was the culprit

but the hashes look good here with this pr checked out and running make test.

[zeha]

I don't have an opinion on which directories are added here really. I'd question some of the existing ones as maybe obsolete?

I am mildly concerned with the amount of stuff the config stats on startup.