Zsh Mailing List Archive
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Re: Glob problem

On 10/22/13 14:49, Brent Briggs wrote:

Adding the (N) Glob Qualifier made a difference but is I'm still not quite there yet.

pattern=git*(N)
print -l $path/$~pattern

Output:
----------
/opt/local/bin
/opt/local/sbin
/usr/bin
/bin
/usr/sbin
/sbin
/usr/local/bin
/usr/local/MacGPG2/bin

This is my full path listing minus the final entry /Users/brent/bin. I know this is a bit of an incidental question but why is the final path entry missing from this output?

Trying this gets me a little closer.

pattern=git*(N)
for entry in $path
do
	print -l $entry/$~pattern
done

Output:
----------
/opt/local/bin/git
/opt/local/bin/git-credential-osxkeychain
/opt/local/bin/git-cvsserver
/opt/local/bin/git-receive-pack
/opt/local/bin/git-shell
/opt/local/bin/git-upload-archive
/opt/local/bin/git-upload-pack
/opt/local/bin/gitk
-- blank --
/usr/bin/git
/usr/bin/git-cvsserver
/usr/bin/git-receive-pack
/usr/bin/git-shell
/usr/bin/git-upload-archive
/usr/bin/git-upload-pack
-- blank --
-- blank --
-- blank --
-- blank --
-- blank --

Blank lines are printed for the directories that contain no pattern matches. Any quick way to get rid of these?


I'm sure there is a better way, but this should work:

v=(); for entry in $path; do v+=($entry/$~pattern); done; print -l $v





On Oct 22, 2013, at 2:12 PM, Peter Miller<peter.d.miller@xxxxxxxxxx>  wrote:


On 10/22/13 14:02, Brent Briggs wrote:

Thanks for all the responses. The glob is now being generated properly. However, I am still having a problem getting my loop to run completely through.

pattern=git*
for entry in $path
do
     print -l $entry/$~pattern
done

Output:
----------
/opt/local/bin/git
/opt/local/bin/git-credential-osxkeychain
/opt/local/bin/git-cvsserver
/opt/local/bin/git-receive-pack
/opt/local/bin/git-shell
/opt/local/bin/git-upload-archive
/opt/local/bin/git-upload-pack
/opt/local/bin/gitk
zsh: no matches found: /opt/local/sbin/git*

/opt/local/sbin/ being the second entry in my path.


Also tried:

print -l $path/$~pattern

try

pattern=git*(N)
print -l $path/$~pattern

that will tell zsh to ignore globs that don't have any matches.


Output:
----------
zsh: no matches found: /Users/brent/bin/git*

/Users/brent/bin/ being the last entry in my path.

Looks like I need to use a conditional to test if any pattern matches exist, per directory, before trying to print them. I wasn't able to find a solution in the manual that facilitates testing for the existence of pattern matches. I would like to solve this problem using only globbing if possible. I am probably missing something simple.



On Oct 22, 2013, at 1:05 PM, Philippe Troin<phil@xxxxxxxx>   wrote:


On Tue, 2013-10-22 at 12:45 -0400, Brent Briggs wrote:


I am simply trying to list all matches for a specified pattern in an
array of directory paths, the $path array for example. Here is my
attempt. Where am I going wrong?

Globs are not ran after variable substitution by default.
To run filename generation (aka globs) after variable substitution, use
$~var.

Your example:


pattern=git*
for entry in $path
do
    # Print all files in the path that match the pattern.
    print $entry/$pattern
done

Can be rewritten as:

        pattern=git*
        for entry in $path
        do
            # Print all files in the path that match the pattern.
            print $entry/$~pattern
        done

It can be simplified further as:

        pattern=git*
        print $path/$~pattern

Phil.
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