Date: Wed, 04 Jul 2012 17:34:13 -0700 From: Doug Barton <dougb@FreeBSD.org> To: Tim Kientzle <tim@kientzle.com> Cc: hackers@freebsd.org, Mike Meyer <mwm@mired.org> Subject: Re: Better error messages for command not found (was Re: Pull in upstream before 9.1 code freeze?) Message-ID: <4FF4E105.50502@FreeBSD.org> In-Reply-To: <8E9DECBB-3D1E-4129-A958-9DB0DF69ECC3@kientzle.com> References: <86bojxow6x.fsf@ds4.des.no> <4FF35864.5030109@FreeBSD.org> <CAC8HS2Hx%2BqV1zYSzyM6wYzbyA6BStd3HEwc-VDhv40DHM=qCvw@mail.gmail.com> <CAOjFWZ5ikPz_yDhEQutiXVG354qRHYJTn-M_S4Cx-=YRgFP7eQ@mail.gmail.com> <20120704185104.GA42355@DataIX.net> <4FF4B36A.2040608@FreeBSD.org> <20120704180134.7c649e1b@bhuda.mired.org> <4FF4BEED.10103@FreeBSD.org> <20120704225519.GB19945@DataIX.net> <4FF4CAD1.8080804@FreeBSD.org> <20120704234104.GA392@DataIX.net> <8E9DECBB-3D1E-4129-A958-9DB0DF69ECC3@kientzle.com>
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On 07/04/2012 17:30, Tim Kientzle wrote: > On Jul 4, 2012, at 4:41 PM, Jason Hellenthal wrote: >> >> On Wed, Jul 04, 2012 at 03:59:29PM -0700, Doug Barton wrote: >>> On 07/04/2012 15:55, Jason Hellenthal wrote: >>>> Seeing as sudo plays a big part of this >>> >>> No ... not only is sudo not a necessary component, it shouldn't be >>> involved at all. The feature works on debian/ubuntu for regular >>> userspace commands. >>> >> >> What are they using to authenticate for the install ? do you know ? > > Huh? What install? Who's talking about install? > > The version of this I've seen looks like this: > > $ svn co https://some.url/ > svn: Command not found. > To use this command, install one of the following packages: > devel/subversion > devel/subversion-freebsd > devel/subversion16 > > That's all it does: It just prints out a more informative error message. > It does not install anything, it requires no special permissions, > and does not (as far as I can see) introduce any security or > performance problems. > > The implementation is pretty simple: > * A tool for building a database that maps command names > to package names. (This would run against a ports tree or > package repository. Conceptually, it's pretty similar to > how port/package indexes get built today.) > * Some way to distribute that database (Probably as part of ISO > releases, maybe extend 'portsnap' or 'pkg_add' to update it?) > * A program to look up command names in that database > and print out the results. > * A shell hook to run said program whenever a "command not found" > error occurs. > > As a first prototype, the database could just be a text file > and the look up program could be a shell script that uses > grep and sed. Right-O. The db should almost certainly be updated and distributed as part of the (already automated) INDEX generation and distribution process. Doug -- This .signature sanitized for your protection
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