[9fans] Tags for files

[9fans] Tags for files

[Fco. J. Ballesteros]

There's a new tag utility at /n/sources/nemo/sys/src/cmd/tag
(see its man page) to attach arbitrary tags to files and search
for files using their tags (a la gmail).

It's just born here, but I think it's addictive.

     EXAMPLE
          This generates a new database.
               ; tag/scan
          This tags $home/src/adb.c as a cool program and searches for
          a cool tag program.
               ; tag/Tag $home/src/tag/adb.c cool
               ; tag/adb -s cool tag

hth

PS:  Use with caution :-)

Re: [9fans] Tags for files

[Russ Cox]

> There's a new tag utility at /n/sources/nemo/sys/src/cmd/tag
> (see its man page) to attach arbitrary tags to files and search
> for files using their tags (a la gmail).

I'm trying to understand this.  It looks to me like in addition to
what you've said above, you can write filters that get run every
time a file is noticed to have been created or changed, so
that tags can be automatically attached. 

Can you give examples of what kind of searches you do?

Russ

Re: [9fans] Tags for files

[boyd, rounin]

> Can you give examples of what kind of searches you do?

yeah

Re: [9fans] Tags for files

[Fco. J. Ballesteros]

> I'm trying to understand this.  It looks to me like in addition to
> what you've said above, you can write filters that get run every
> time a file is noticed to have been created or changed, so
> that tags can be automatically attached. 

Yes. The thing is that the scan script generates an initial set of 
tags for the files. The tags are actually generated by any /bin/tag/f*
script that is found. This is to save you the work of defining tags
that could be defined by a program. For example, I have used
the muid and permissions from the output of ls -l and the
name of elements in the full path name as the initial set of tags.

This is an example. This entry is for $home/src/9/block.c

/src/9/block.c muid=[nemo] perm=--rw-r--r-- usr nemo src 9 block.c

> Can you give examples of what kind of searches you do?

This would allow me to run "F 9 block" from acme. Other searches I do
are

F planb net slides
F tag sys src
F rwxrwxrwx sys
F os course slides


and the like. So far, I have not defined tags by hand. It seems that
in my case the names in the path suffice. But, for example, I added
the permissions as a tag soon after I started to use the program.

Re: [9fans] Tags for files

[Fco. J. Ballesteros]

> Yes. The thing is that the scan script generates an initial set of 
> tags for the files. The tags are actually generated by any /bin/tag/f*

Forgot to say that it works as you said. The first time you run scan,
all files noticed are tagged. Following runs of scan would auto-tag just the
new files.

Re: [9fans] Tags for files

[Kenji Okamoto]

>      EXAMPLE
>           This generates a new database.
>                ; tag/scan
>           This tags $home/src/adb.c as a cool program and searches for
>           a cool tag program.
>                ; tag/Tag $home/src/tag/adb.c cool
>                ; tag/adb -s cool tag

Can this tag a program in the past, probably in venti, and search it
from the current fossil file server?

Kenji

Re: [9fans] Tags for files

[Fco. J. Ballesteros]

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You can store the tag db in your dump, and adjust F
to use that one.

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From: Kenji Okamoto <okamoto@granite.cias.osakafu-u.ac.jp>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Tags for files
Date: Thu, 14 Oct 2004 09:56:05 +0900
Message-ID: <27edcf9c1341dccf1770f67eb4ef3d3a@granite.cias.osakafu-u.ac.jp>

>      EXAMPLE
>           This generates a new database.
>                ; tag/scan
>           This tags $home/src/adb.c as a cool program and searches for
>           a cool tag program.
>                ; tag/Tag $home/src/tag/adb.c cool
>                ; tag/adb -s cool tag

Can this tag a program in the past, probably in venti, and search it
from the current fossil file server?

Kenji