I intend to use Tab Completion, then I try to load readline using the following command:
$ irb -r irb/completion
However, irb throws an error message shown below:
/usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require':LoadError: cannot load such file -- readline
Then I try to install readline using command:
gem install readline
But, RubyGems prompt me that
ERROR: Could not find a valid gem 'readline' (>= 0) in any repository
How can I fix it?
You have been troubled by the naming.
The repo name is rb-readline
You need to have the readline libraries installed when you compile Ruby.
Follow this blog: http://vvv.tobiassjosten.net/ruby-on-rails/fixing-readline-for-the-ruby-on-rails-console/
Related
In my terminal I use:
sudo gem install cocoapods
My terminal gives the error shown below. How can I solve this? I have tried a few variations and I cannot get it to work.
Building native extensions. This could take a while...
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
current directory: /Library/Ruby/Gems/2.6.0/gems/ffi-1.12.2/ext/ffi_c
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20200518-1427-ajbhbt.rb extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/include/ruby.h
You might have to install separate package for the ruby development
environment, ruby-dev or ruby-devel for example.
extconf failed, exit code 1
Gem files will remain installed in /Library/Ruby/Gems/2.6.0/gems/ffi-1.12.2 for inspection.
Results logged to /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-19/2.6.0/ffi-1.12.2/gem_make.out
Agree with Vinayaka and Bryan you're missing some ruby header files and it looks like they're required. Not sure about your environment setup but it may help to just reinstall the latest Xcode from scratch.
Also, I've had some recent problems with Cocoapods installed via terminal. The terminal installs the latest build of Cocoapods. If you're looking for something stable then maybe try the Cocoapods app. It's clunky and it can't read pod files from the latest version of Cocoapods (so you'll have to regenerate any existing podfiles) but its easier to work with especially for those who prefer a graphical environment.
We need to install Xcode's developer tools. The easiest way to do this is through terminal .
xcode-select --install
Later, if there are any write permission issues, use the below code.
sudo gem install cocoapods -n /usr/local/bin/..
P.S: -n specifies the directory where binaries are located.
Please try with
brew install cocoapods
I have developed a package with rpmbuild with unpre script error. The package on testing successfully installed but now Iam unable to remove the package (even with force option) or nodeps option
I have encountered the same situation. However I was able to uninstall the package with --noscripts option as in rpm -e <pkgname> --noscripts.
I want to find the differences between two versions of Perl using the corelist command line utility.
I tried running the following command:
corelist File::Spec
but I got an error:
-bash: corelist: command not found
How can I resolve this?
The error suggests that corelist is not installed on your machine. If not installed, you can install it via
Ubuntu: sudo apt-get install libmodule-corelist-perl
Centos: Via RPM here
Once you have it installed, you can find the differences between two versions of Perl as follows:
corelist --diff v5.12.0 v5.24.0
If you have problems installing it, there is a web version of corelist available online to which you can refer: http://perlpunks.de/corelist It supports doing differences between Perl versions too.
I recently installed Casperjs on server (centos) and when I try to run I get the following error:
File "/usr/local/bin/casperjs", line 11
except subprocess.CalledProcessError as err:
^
SyntaxError: invalid syntax
This is the result of running "casperjs --version" which should just print the version number. Although any other commands with casperjs also give the same output.
The steps that I followed to install are pretty standard:
git clone git://github.com/n1k0/casperjs.git
cd casperjs
git checkout tags/1.0.2
ln -sf `pwd`/bin/casperjs /usr/local/bin/casperjs
Also, I'm running version 1.9.6 of phantomjs which is required for casperjs.
Any ideas?
You could check if the version of python is greater than 2.6 or not
for my case , I type the command
python -v
and I get 2.4.3 on the old online redhat machine .
than you could try update your python version .
It might some help
XML::Parser fails to build on a quite fresh 64-bit Debian box. After issuing cpan XML::Parser, cpan fails with lots of errors about Expat.c and Expat.xs:
[...]
Expat.xs:2182: error: ‘CallbackVector’ has no member named ‘skip_until’
Expat.c: In function ‘XS_XML__Parser__Expat_Do_External_Parse’:
Expat.c:2904: error: ‘XML_Parser’ undeclared (first use in this function)
Expat.c:2904: error: expected ‘;’ before ‘parser’
Expat.xs:2194: error: ‘parser’ undeclared (first use in this function)
make[1]: *** [Expat.o] Error 1
make[1]: Leaving directory `/root/.cpan/build/XML-Parser-2.41-rpV6ok/Expat'
make: *** [subdirs] Error 2
TODDR/XML-Parser-2.41.tar.gz
/usr/bin/make -- NOT OK
Running make test
Can't test without successful make
Running make install
Make had returned bad status, install seems impossible
Message at the start of the output explains that expat-devel is needed for building.
Expat must be installed prior to building XML::Parser and I can't find
it in the standard library directories. Install 'expat-devel' package with your
OS package manager. See 'README'.
But expat-devel is not in Debian repository.
Is it possible to get over this without need to build/install expat from source?
The package you want to install is named libexpat1-dev. You could also just install libxml-parser-perl via apt-get. Or if you really want to install via CPAN try installing the Debian packages dependencies first via apt-get build-dep libxml-parser-perl.
libexpat1-dev contains both libexpat and expat.h, which are both mentioned in the message as well:
If expat is installed, but in a non-standard directory, then use the
following options to Makefile.PL:
EXPATLIBPATH=... To set the directory in which to find libexpat
EXPATINCPATH=... To set the directory in which to find expat.h
Installing libexpat1-dev seems to solve the problem:
$ aptitude install libexpat1-dev
There is always the manual method - to build/install expat from source.
(This example shows installing to an alternative location for XAMPP | LAMPP)
Download from:
http://sourceforge.net/projects/expat/files/expat/
tar zxf /[where-ever]/expat-2.1.0.tar.gz -C /tmp
cd /tmp/expat-2.1.0
/opt/lampp/bin/perl ./configure --prefix=/opt/lampp LDFLAGS=-L/opt/lampp/lib
make
make install
http://search.cpan.org - search for and download - XML::Parser
tar zxf /[where-ever]/XML-Parser-2.41.tar.gz -C /tmp
cd /tmp/XML-Parser-2.41
/opt/lampp/bin/perl ./Makefile.PL EXPATLIBPATH=/opt/lampp/lib EXPATINCPATH=/opt/lampp/include
make
make test
make install
Work like a charm in Ubuntu 15.04. The only thing that I need is install Perl XML Parser with:
sudo apt-get install libxml-parser-perl
And following the instructions here, I was able to import successfully all my ratings into Rhythmbox. Now, the only work that I need to do is create again the smart play lists, that is nothing compared with my entire libray ratings.
Today I had the same issue wanting to complile the new GIMP 2.9.4 beta on OSX 10.8 and the aid of homebrew.
First install perl
brew install perl
Then the XML::Parser module by going into the perl shell with
perl -MCPAN -e shell
And inside the shell install XML::Parser by typing
install XML::Parser
Exit shell
exit
Now, verify it has been installed successfully. If everything is ok, you will not see an error.
perl -e "require XML::Parser"
If the ./configure still fails missing XML::Parser, then intltools is not using the perl you have installed. Looking at the script tells me it does the test with $INTLTOOL_PERL -e "require XML::Parser". Trying a echo $INTLTOOL_PERL gave out nothing, so the magic is to set it with
export $INTLTOOL_PERL=perl
Now run ./configure again.
None of the above methods worked for me. I had the right environment variables setup but they were somehow not picked up by cpanm that I use to install perl modules. Expat was also installed.
Here is what I did to overcome the same problem that OP is reporting.
This is very close to what #LadyBuzz suggested.
Download the XML::Parser from cpan.org
Extract the tarball into directory and descend to it.
Open the Makefile.pl and edit the first lines to actually have the absolute paths to both: EXPATLIBPATH and EXPATINCPATH
Save the Makefile.pl, go up one level and create a new tarball with the Makefile.pl that you just edited.
Execute cpanm on the newly created tarball.
This resulted in successful installation of the module.