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Although PHP (and quite out of necessity, I would add ...) is much more “modularized” by (Linux) distros these days, Perl also is divided-up by many distros and sometimes there doesn’t seem to be too much reason to it.   Even so-called “core” facilities can be affected.   In the Ubuntu distro, for instance, here’s a very small subset of the available (Ubuntu) packages which, in one way or another, deal with Perl and encoding:

libencode-locale-perl - utility to determine the locale encoding crip - terminal-based ripper/encoder/tagger tool libbencode-perl - Perl module for BitTorrent serialisation format libcatmandu-importer-getjson-perl - load JSON-encoded data from a serv +er using a GET HTTP request libdbix-class-encodedcolumn-perl - extension to encode column values a +utomatically libencode-arabic-perl - perl implementation for Arabic encodings libencode-detect-perl - Encode::Encoding subclass that detects the enc +oding of data libencode-eucjpms-perl - Perl library for Microsoft Compatible Japanes +e Encodings libencode-hanextra-perl - perl module providing extra sets of Chinese +character encodings libencode-imaputf7-perl - modification of UTF-7 encoding for IMAP libencode-jis2k-perl - perl module providing JIS X 0212 (aka JIS 2000) + Encodings libencode-perl - module providing interfaces between Perl's strings an +d the system libencode-zapcp1252-perl - zap Windows Western gremlin characters libgrabcd-readconfig-perl - rip and encode audio CDs - common files libhtml-html5-entities-perl - module to encode and decode character en +tities defined in HTML5 libidna-punycode-perl - module to encode Unicode string in Punycode libimager-qrcode-perl - Generate QR code with Imager using libqrencode liblatex-encode-perl - Perl module to encode characters for LaTeX form +atting libmail-verp-perl - Variable Envelope Return Paths (VERP) address enco +der/decoder libmarc-parser-raw-perl - parser for ISO 2709 encoded MARC records libmarc-xml-perl - Perl library to access MARC data encoded as XML libmime-base32-perl - Base32 encoder/decoder libmime-encwords-perl - Perl interface to deal with RFC 2047 encoded w +ords libnet-idn-encode-perl - Internationalizing Domain Names in Applicatio +ns (IDNA) libnumber-recordlocator-perl - Perl module that encodes integers into +a short "locator string" libsereal-encoder-perl - fast, compact, powerful binary serialization +module libsession-storage-secure-perl - module implementing a secure way to e +ncode session data libtex-encode-perl - Perl module to transform UTF-8 strings into TeX libtext-csv-encoded-perl - encoding-aware comma-separated values manip +ulator liburi-encode-perl - Perl module to encode and decode strings to URIs

So, these are things which affect both Perl and CPAN but do so in ways that neither of them per se entirely knows about.   And, different distro packagers, each operating independently, inevitably made different decisions about what to put where.   Although they try very hard to correctly handle dependencies, mistakes do get made.

Comment:   In some cases, I dealt with this problem by treating it like the “install Perl on a shared-hosting system” use-case, by creating an application-specific CPAN library and installing modules there, pointing each application to its own CPAN repository when it runs, and thereby insulating them (somewhat) from what is installed at the system (Ubuntu-package) level and from other applications which were running on the same environment at the same time.   (This was to deal with a particularly-messy mash-up of legacy applications that were being ported to Linux from something else.   This slightly-helped the team to deal with each of them one-at-a-time.)   In other cases, I simply made good use of the distro-provided facilities that let me extract a package-list from one machine and automatically synchronize it to others.

In reply to Re: Shouldn't enc2xs always be included as part of Encode? by sundialsvc4
in thread Shouldn't enc2xs always be included as part of Encode? by BeneSphinx

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