in reply to why isn't cpan like npm?
"To date, I fear using CPAN because of past experience having to go through tens of minutes of questions in command line"
Citations please, specific distribution names required. This is not my near 20 year experience. A minute fraction maybe, but that's for your own good.
"1. Why isn't there an NPM for Perl?"
As someone who dabbles in JS/JQuery very, very infrequently, can you elaborate on what NPM is for so that those in this neighbourhood who may be ignorant (like me) can get a better picture?
"2. Why is JSON so popular if Perl already had the same concepts long before JS existed."
JSON, although related to JS by name, is simply a standard data storage format. XML has come into presence as well, but it (imho) sucks. It's just another storage mechanism that works cross-platform. It has nothing to do with Perl at all. In fact, Perl data structures match more closely to JSON structures than any other language. That said, I have given examples of using JSON to transfer serial data between Perl, Python, C, C++, C# ad-infinitum. Perl has core (and external) storage formats, but the ones you may be thinking of are not easily across platforms. Either way, JSON is just as popular as something like SQLite for example... it's just a way to store, transact upon and use data across platforms and languages.
"3. Why is there so few Perl versions for windows..."
berrybrew.
-stevieb
Re^2: why isn't cpan like npm?
by marto (Cardinal) on Apr 18, 2018 at 09:28 UTC
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"Citations please, specific distribution names required."
While some modules do prompt interactively, I think they mean the first time setup when running cpan, as they continue "... before I hopefully can get to entering command lines".
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Re^2: why isn't cpan like npm?
by CodeDmitry (Initiate) on Apr 20, 2018 at 15:31 UTC
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1. Here's a direct paste of me running cpan install Parse::Lex, :\ not a very great experience
$ cpan install Parse::Lex
/usr/lib/perl5/5.8/CPAN/Config.pm initialized.
CPAN is the world-wide archive of perl resources. It consists of about
100 sites that all replicate the same contents all around the globe.
Many countries have at least one CPAN site already. The resources
found on CPAN are easily accessible with the CPAN.pm module. If you
want to use CPAN.pm, you have to configure it properly.
If you do not want to enter a dialog now, you can answer 'no' to this
question and I'll try to autoconfigure. (Note: you can revisit this
dialog anytime later by typing 'o conf init' at the cpan prompt.)
Are you ready for manual configuration? [yes]
The following questions are intended to help you with the
configuration. The CPAN module needs a directory of its own to cache
important index files and maybe keep a temporary mirror of CPAN files.
This may be a site-wide directory or a personal directory.
First of all, I'd like to create this directory. Where?
CPAN build and cache directory? [/home/Dmitry/.cpan]
If you want, I can keep the source files after a build in the cpan
home directory. If you choose so then future builds will take the
files from there. If you don't want to keep them, answer 0 to the
next question.
How big should the disk cache be for keeping the build directories
with all the intermediate files?
Cache size for build directory (in MB)? [10]
By default, each time the CPAN module is started, cache scanning
is performed to keep the cache size in sync. To prevent from this,
disable the cache scanning with 'never'.
Perform cache scanning (atstart or never)? [atstart]
To considerably speed up the initial CPAN shell startup, it is
possible to use Storable to create a cache of metadata. If Storable
is not available, the normal index mechanism will be used.
Cache metadata (yes/no)? [yes]
The next option deals with the charset your terminal supports. In
general CPAN is English speaking territory, thus the charset does not
matter much, but some of the aliens out there who upload their
software to CPAN bear names that are outside the ASCII range. If your
terminal supports UTF-8, you say no to the next question, if it
supports ISO-8859-1 (also known as LATIN1) then you say yes, and if it
supports neither nor, your answer does not matter, you will not be
able to read the names of some authors anyway. If you answer no, names
will be output in UTF-8.
Your terminal expects ISO-8859-1 (yes/no)? [yes]
If you have one of the readline packages (Term::ReadLine::Perl,
Term::ReadLine::Gnu, possibly others) installed, the interactive CPAN
shell will have history support. The next two questions deal with the
filename of the history file and with its size. If you do not want to
set this variable, please hit SPACE RETURN to the following question.
File to save your history? [/home/Dmitry/.cpan/histfile]
Number of lines to save? [100]
The CPAN module can detect when a module that which you are trying to
build depends on prerequisites. If this happens, it can build the
prerequisites for you automatically ('follow'), ask you for
confirmation ('ask'), or just ignore them ('ignore'). Please set your
policy to one of the three values.
Policy on building prerequisites (follow, ask or ignore)? [ask]
The CPAN module will need a few external programs to work properly.
Please correct me, if I guess the wrong path for a program. Don't
panic if you do not have some of them, just press ENTER for those. To
disable the use of a download program, you can type a space followed
by ENTER.
Where is your gzip program? [/bin/gzip]
Where is your tar program? [/bin/tar]
Warning: unzip not found in PATH
Where is your unzip program? []
Where is your make program? [/bin/make]
Warning: lynx not found in PATH
Where is your lynx program? []
Where is your wget program? [/c/Program Files (x86)/sox-14-4-2/wget]
Warning: ncftpget not found in PATH
Where is your ncftpget program? []
Warning: ncftp not found in PATH
Where is your ncftp program? []
Where is your ftp program? [/bin/ftp]
Warning: gpg not found in PATH
Where is your gpg program? []
What is your favorite pager program? [/bin/less]
What is your favorite shell?
Every Makefile.PL is run by perl in a separate process. Likewise we
run 'make' and 'make install' in processes. If you have any
parameters (e.g. PREFIX, LIB, UNINST or the like) you want to pass
to the calls, please specify them here.
If you don't understand this question, just press ENTER.
Parameters for the 'perl Makefile.PL' command?
Typical frequently used settings:
PREFIX=~/perl non-root users (please see manual for more hin
+ts)
Your choice: []
Parameters for the 'make' command?
Typical frequently used setting:
-j3 dual processor system
Your choice: []
Parameters for the 'make install' command?
Typical frequently used setting:
UNINST=1 to always uninstall potentially conflicting files
Your choice: []
Sometimes you may wish to leave the processes run by CPAN alone
without caring about them. As sometimes the Makefile.PL contains
question you're expected to answer, you can set a timer that will
kill a 'perl Makefile.PL' process after the specified time in seconds.
If you set this value to 0, these processes will wait forever. This is
the default and recommended setting.
Timeout for inactivity during Makefile.PL? [0]
If you're accessing the net via proxies, you can specify them in the
CPAN configuration or via environment variables. The variable in
the $CPAN::Config takes precedence.
Your ftp_proxy?
Your http_proxy?
Your no_proxy?
You have no /home/Dmitry/.cpan/sources/MIRRORED.BY
I'm trying to fetch one
CPAN: LWP::UserAgent loaded ok
Fetching with LWP:
ftp://ftp.perl.org/pub/CPAN/MIRRORED.BY
Now we need to know where your favorite CPAN sites are located. Push
a few sites onto the array (just in case the first on the array won't
work). If you are mirroring CPAN to your local workstation, specify a
file: URL.
First, pick a nearby continent and country (you can pick several of
each, separated by spaces, or none if you just want to keep your
existing selections). Then, you will be presented with a list of URLs
of CPAN mirrors in the countries you selected, along with previously
selected URLs. Select some of those URLs, or just keep the old list.
Finally, you will be prompted for any extra URLs -- file:, ftp:, or
http: -- that host a CPAN mirror.
(1) Africa
(2) Asia
(3) Europe
(4) North America
(5) Oceania
(6) South America
Select your continent (or several nearby continents) []
Sorry! since you don't have any existing picks, you must make a
geographic selection.
(1) Africa
(2) Asia
(3) Europe
(4) North America
(5) Oceania
(6) South America
Select your continent (or several nearby continents) []
Sorry! since you don't have any existing picks, you must make a
geographic selection.
(1) Africa
(2) Asia
(3) Europe
(4) North America
(5) Oceania
(6) South America
Select your continent (or several nearby continents) [] 4
Sorry! since you don't have any existing picks, you must make a
geographic selection.
(1) Canada
(2) Costa Rica
(3) Mexico
(4) United States
Select your country (or several nearby countries) [] 1
Sorry! since you don't have any existing picks, you must make a
geographic selection.
(1) ftp://CPAN.mirror.rafal.ca/pub/CPAN/
(2) ftp://ftp.ottix.net/pub/CPAN/
(3) ftp://mirror.csclub.uwaterloo.ca/CPAN/
(4) ftp://mirror.its.dal.ca/cpan/
(5) http://cpan.metacpan.org/
(6) http://cpan.mirror.colo-serv.net/
(7) http://mirrors.gossamer-threads.com/CPAN/
Select as many URLs as you like (by number),
put them on one line, separated by blanks, e.g. '1 4 5' [] 1
Enter another URL or RETURN to quit: [] 2
"file:2/" doesn't look like an URL at first sight.
I'll ignore it for now.
You can add it to your /usr/lib/perl5/5.8/CPAN/Config.pm
later if you're sure it's right.
Enter another URL or RETURN to quit: [] 3
"file:3/" doesn't look like an URL at first sight.
I'll ignore it for now.
You can add it to your /usr/lib/perl5/5.8/CPAN/Config.pm
later if you're sure it's right.
Enter another URL or RETURN to quit: []
New set of picks:
ftp://CPAN.mirror.rafal.ca/pub/CPAN/
commit: wrote /usr/lib/perl5/5.8/CPAN/Config.pm
CPAN: Storable loaded ok
Fetching with LWP:
ftp://CPAN.mirror.rafal.ca/pub/CPAN/authors/01mailrc.txt.gz
Going to read /home/Dmitry/.cpan/sources/authors/01mailrc.txt.gz
CPAN: Compress::Zlib loaded ok
Fetching with LWP:
ftp://CPAN.mirror.rafal.ca/pub/CPAN/modules/02packages.details.txt.g
+z
Going to read /home/Dmitry/.cpan/sources/modules/02packages.details.tx
+t.gz
Database was generated on Fri, 20 Apr 2018 14:54:55 GMT
There's a new CPAN.pm version (v2.16) available!
[Current version is v1.7602]
You might want to try
install Bundle::CPAN
reload cpan
without quitting the current session. It should be a seamless upgrad
+e
while we are running...
Fetching with LWP:
ftp://CPAN.mirror.rafal.ca/pub/CPAN/modules/03modlist.data.gz
Going to read /home/Dmitry/.cpan/sources/modules/03modlist.data.gz
Going to write /home/Dmitry/.cpan/Metadata
Out of memory during request for 14 bytes, total sbrk() is 267628544 b
+ytes!
Out of memory during request for 16 bytes, total sbrk() is 267628544 b
+ytes!
Callback called exit, <FH> line 12.
END failed--call queue aborted, <FH> line 12.
Out of memory during request for 281 bytes, total sbrk() is 267628544
+bytes!
quote: As someone who dabbles in JS/JQuery very, very infrequently, can you elaborate on what NPM is for so that those in this neighbourhood who may be ignorant (like me) can get a better picture?
NPM is a package manager that comes with NodeJS installations. I mention it because I want to understand why Perl, a language with much older and experienced scripting community has so much harder to use package manager than NodeJS.
quote: Perl data structures match more closely to JSON structures than any other language.
I have to sidetrack a bit here, Perl modules are largely package based(a weird version of hash tables that are less intuitive to use yet somehow benchmark faster than hash tables). NodeJS modules are just hash tables with a bunch of memory leaks in them.
| [reply] [d/l] |
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You got several replies that said you should be using cpanm instead of cpan. I reiterate it. App::cpanminus is easier, and probably better, than the regular cpan tool in every way I can think. The docs show how it can be bootstrapped to install without using cpan.
| [reply] |
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sudo cpan Parse::Lex
[sudo] password for marto:
CPAN: Storable loaded ok (v2.53_01)
Reading '/home/marto/.local/share/.cpan/Metadata'
Database was generated on Fri, 16 Feb 2018 10:41:02 GMT
Reading '/home/marto/.local/share/.cpan/sources/authors/01mailrc.txt.g
+z'
CPAN: Compress::Zlib loaded ok (v2.068)
......................................................................
+......DONE
Reading '/home/marto/.local/share/.cpan/sources/modules/02packages.det
+ails.txt.gz'
Database was generated on Fri, 20 Apr 2018 11:17:02 GMT
CPAN: HTTP::Date loaded ok (v6.02)
.............
New CPAN.pm version (v2.16) available.
[Currently running version is v2.11]
You might want to try
install CPAN
reload cpan
to both upgrade CPAN.pm and run the new version without leaving
the current session.
...............................................................DONE
CPAN: LWP::UserAgent loaded ok (v6.15)
Fetching with LWP:
http://www.cpan.org/modules/03modlist.data.gz
CPAN: YAML loaded ok (v1.15)
Reading '/home/marto/.local/share/.cpan/sources/modules/03modlist.data
+.gz'
DONE
Writing /home/marto/.local/share/.cpan/Metadata
Running install for module 'Parse::Lex'
Fetching with LWP:
http://www.cpan.org/authors/id/P/PS/PSCUST/ParseLex-2.21.tar.gz
CPAN: Digest::SHA loaded ok (v5.95)
Fetching with LWP:
http://www.cpan.org/authors/id/P/PS/PSCUST/CHECKSUMS
Checksum for /home/marto/.local/share/.cpan/sources/authors/id/P/PS/PS
+CUST/ParseLex-2.21.tar.gz ok
CPAN: File::Temp loaded ok (v0.2304)
CPAN: CPAN::Meta::Requirements loaded ok (v2.140)
CPAN: Parse::CPAN::Meta loaded ok (v1.4414)
CPAN: CPAN::Meta loaded ok (v2.150005)
CPAN: Module::CoreList loaded ok (v5.20151213)
Configuring P/PS/PSCUST/ParseLex-2.21.tar.gz with Makefile.PL
Checking if your kit is complete...
Looks good
Warning: prerequisite Parse::Template 3.04 not found.
Generating a Unix-style Makefile
Writing Makefile for Parse::Lex
Writing MYMETA.yml and MYMETA.json
PSCUST/ParseLex-2.21.tar.gz
/usr/bin/perl Makefile.PL INSTALLDIRS=site -- OK
Running make for P/PS/PSCUST/ParseLex-2.21.tar.gz
---- Unsatisfied dependencies detected during ----
---- PSCUST/ParseLex-2.21.tar.gz ----
Parse::Template [requires]
Running install for module 'Parse::Template'
Fetching with LWP:
http://www.cpan.org/authors/id/P/PS/PSCUST/ParseTemplate-3.08.tar.gz
Checksum for /home/marto/.local/share/.cpan/sources/authors/id/P/PS/PS
+CUST/ParseTemplate-3.08.tar.gz ok
Configuring P/PS/PSCUST/ParseTemplate-3.08.tar.gz with Makefile.PL
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Parse::Template
Writing MYMETA.yml and MYMETA.json
PSCUST/ParseTemplate-3.08.tar.gz
/usr/bin/perl Makefile.PL INSTALLDIRS=site -- OK
Running make for P/PS/PSCUST/ParseTemplate-3.08.tar.gz
cp lib/Parse/Template.pm blib/lib/Parse/Template.pm
Manifying 1 pod document
PSCUST/ParseTemplate-3.08.tar.gz
/usr/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::H
+arness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/l
+ib', 'blib/arch')" t/*.t
t/debug.t ..... ok
t/rt_58128.t .. ok
t/test1.t ..... ok
t/test2.t ..... ok
t/test3.t ..... ok
t/test4.t ..... ok
t/test5.t ..... ok
t/test6.t ..... ok
All tests successful.
Files=8, Tests=32, 2 wallclock secs ( 0.20 usr 0.02 sys + 1.22 cusr
+ 0.12 csys = 1.56 CPU)
Result: PASS
PSCUST/ParseTemplate-3.08.tar.gz
/usr/bin/make test -- OK
Running make install
Manifying 1 pod document
Installing /usr/local/share/perl/5.22.1/Parse/Template.pm
Installing /usr/local/man/man3/Parse::Template.3pm
Appending installation info to /usr/lib/i386-linux-gnu/perl/5.22/perll
+ocal.pod
PSCUST/ParseTemplate-3.08.tar.gz
/usr/bin/make install -- OK
PSCUST/ParseLex-2.21.tar.gz
Has already been unwrapped into directory /home/marto/.local/share/.
+cpan/build/ParseLex-2.21-SyvmkU
PSCUST/ParseLex-2.21.tar.gz
Has already been prepared
Running make for P/PS/PSCUST/ParseLex-2.21.tar.gz
cp lib/Parse/ALex.pm blib/lib/Parse/ALex.pm
cp lib/Parse/LexEvent.pm blib/lib/Parse/LexEvent.pm
cp lib/Parse/Token-t.pm blib/lib/Parse/Token-t.pm
cp lib/Parse/Token.pm blib/lib/Parse/Token.pm
cp lib/Parse/CLex.pm blib/lib/Parse/CLex.pm
cp lib/Parse/Lex.pm blib/lib/Parse/Lex.pm
cp lib/Parse/Trace.pm blib/lib/Parse/Trace.pm
cp lib/Parse/YYLex.pm blib/lib/Parse/YYLex.pm
Manifying 7 pod documents
PSCUST/ParseLex-2.21.tar.gz
/usr/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::H
+arness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/l
+ib', 'blib/arch')" t/*.t
t/debug.t ..... ok
t/rt_58128.t .. ok
t/test1.t ..... ok
t/test2.t ..... ok
t/test3.t ..... ok
t/test4.t ..... ok
t/test5.t ..... ok
t/test6.t ..... ok
t/test7.t ..... ok
t/test8.t ..... ok
All tests successful.
Files=10, Tests=29, 3 wallclock secs ( 0.21 usr 0.03 sys + 2.76 cus
+r 0.19 csys = 3.19 CPU)
Result: PASS
PSCUST/ParseLex-2.21.tar.gz
/usr/bin/make test -- OK
Running make install
Manifying 7 pod documents
Installing /usr/local/share/perl/5.22.1/Parse/LexEvent.pm
Installing /usr/local/share/perl/5.22.1/Parse/Token-t.pm
Installing /usr/local/share/perl/5.22.1/Parse/Token.pm
Installing /usr/local/share/perl/5.22.1/Parse/Lex.pm
Installing /usr/local/share/perl/5.22.1/Parse/CLex.pm
Installing /usr/local/share/perl/5.22.1/Parse/YYLex.pm
Installing /usr/local/share/perl/5.22.1/Parse/Trace.pm
Installing /usr/local/share/perl/5.22.1/Parse/ALex.pm
Installing /usr/local/man/man3/Parse::CLex.3pm
Installing /usr/local/man/man3/Parse::LexEvent.3pm
Installing /usr/local/man/man3/Parse::Token.3pm
Installing /usr/local/man/man3/Parse::Trace.3pm
Installing /usr/local/man/man3/Parse::ALex.3pm
Installing /usr/local/man/man3/Parse::YYLex.3pm
Installing /usr/local/man/man3/Parse::Lex.3pm
Appending installation info to /usr/lib/i386-linux-gnu/perl/5.22/perll
+ocal.pod
PSCUST/ParseLex-2.21.tar.gz
/usr/bin/make install -- OK
Are you sure you're not hitting a limit (for example) enforced on your user? Also perl 5.8 is ancient, and as explained earlier, cpanm is much better than cpan. Essentially it looks like you're hitting a system limit and are running a very old perl when the modern world is much better :) | [reply] [d/l] [select] |
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