# How regenerate ri data? **URL:** \ **Category:** Ruby\ **Created:** [July 30, 2008, 12:05am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476 "2008-07-30T00:05:37Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 12:05am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/1 "2008-07-30T00:05:37Z")
[http://rubyforge.org/forum/forum.php?forum\_id=25981:](http://rubyforge.org/forum/forum.php?forum_id=25981:) > - ri now walks the ancestors of a class looking for a method e.g. ri > File#read displays documentation for IO#read (may require regeneration of > ri data) Sounds cool! But: Big-iMac-Attack:~ mattneub$ rdoc --version rdoc 2.1.0 Big-iMac-Attack:~ mattneub$ ri --version ri 2.1.0 Big-iMac-Attack:~ mattneub$ ri File#read Nothing known about File#read So it sounds like I do need to regenerate the ri data. How? Thx - m. ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 1:24am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/2 "2008-07-30T01:24:04Z")
On Jul 29, 2008, at 15:04 , matt neuburg wrote: > rdoc 2.1.0 > Big-iMac-Attack:~ mattneub$ ri --version > ri 2.1.0 > Big-iMac-Attack:~ mattneub$ ri File#read > Nothing known about File#read > > So it sounds like I do need to regenerate the ri data. How? Thx - m. % sudo make install-doc in the source tarball (assumes you installed your own ruby–if you didn’t, you deleted your rdoc data?) ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 5:25am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/3 "2008-07-30T05:25:32Z")
Ryan D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > in the source tarball (assumes you installed your own ruby–if you > didn’t, you deleted your rdoc data?) Didn’t help, presumably because the rdoc being used is the one in the tarball, not the new version…? m. ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 9:23am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/4 "2008-07-30T09:23:37Z")
On Jul 29, 2008, at 20:24 , matt neuburg wrote: > Didn’t help, presumably because the rdoc being used is the one in the > tarball, not the new version…? nope. same data. you’ve got something else going on. ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 9:49am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/5 "2008-07-30T09:49:59Z")
On Wed, Jul 30, 2008 at 6:04 AM, matt neuburg [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > So it sounds like I do need to regenerate the ri data. How? Thx - m. on your ruby source directory, try running ``` rdoc --all --ri ``` hth. kind regards -botp ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 31, 2008, 1:16am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/6 "2008-07-31T01:16:07Z")
On Jul 30, 2008, at 13:59 , matt neuburg wrote: > This rebuilt my documentation just fine. But > > ri File#read > > still gets a “nothing known” response. > > So, I’m using rdoc 2.1.0, I’ve regenerated the docmentation, but I’m > still not seeing this new feature working. Do other people see it > working? If so, what might be the problem here? works for me: ## % ri File::read --------------------------------------------------------------- IO::read IO.read(name, [length [, offset]] ) =\> string ``` Opens the file, optionally seeks to the given offset, then returns _length_ bytes (defaulting to the rest of the file). +read+ ``` ensures the file is closed before returning. ``` IO.read("testfile") #=> "This is line one\nThis is ``` line two\nT his is line three\nAnd so on…\n" IO.read(“testfile”, 20) #=\> “This is line one\nThi” IO.read(“testfile”, 20, 10) #=\> "ne one\nThis is line " ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 31, 2008, 2:10am UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/7 "2008-07-31T02:10:28Z")
On Jul 30, 2008, at 00:22 AM, Ryan D. wrote: > On Jul 29, 2008, at 20:24 , matt neuburg wrote: > > > Didn’t help, presumably because the rdoc being used is the one in the > > tarball, not the new version…? > > nope. same data. you’ve got something else going on. RDoc 2.1.0 won’t generate RDoc from 1.8 due to a bug introduced before 2.0 to handle C prototypes. I’ll release a 2.1.1 tonight or tomorrow and include proper instructions on how to do this. ---
**Author:** ![matt\_neuburg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@matt\_neuburg](https://www.ruby-forum.com/u/matt_neuburg)\ **Post date:** [July 30, 2008, 11:01pm UTC](https://www.ruby-forum.com/t/how-regenerate-ri-data/144476/8 "2008-07-30T23:01:01Z")
botp [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > On Wed, Jul 30, 2008 at 6:04 AM, matt neuburg [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > So it sounds like I do need to regenerate the ri data. How? Thx - m. > > on your ruby source directory, try running > > ``` > rdoc --all --ri > > ``` Actually what I did was to blow away /usr/local/share/ri/1.8/system and then sudo rdoc --all --ri-system This rebuilt my documentation just fine. But ri File#read still gets a “nothing known” response. So, I’m using rdoc 2.1.0, I’ve regenerated the docmentation, but I’m still not seeing this new feature working. Do other people see it working? If so, what might be the problem here? m.