Add perl-info function & plenv subcommand aliases (#1303)

* Add perl-info function
* Add alias for plenv subcommands
* Load perlbrew if needed
* Load plenv if needed
* Use PERLBREW_ROOT as priority to detect Perlbrew

modules/perl/README.md

@@ -30,6 +30,14 @@ Perlbrew
 An alternative to the above is to use [Perlbrew][2], which allows for the
 management of multiple, isolated Perl installations in the home directory.
 
+plenv
+-----
+
+Yet another alternative is [plenv][3]. This is inspired from rbenv and enables
+switching between multiple binary installations.
+
+The subcommands of plenv is similar with rbenv.
+
 Aliases
 -------
 
@@ -51,13 +59,50 @@ Aliases
   - `plbu` uninstalls a Perl version.
   - `plbx` temporarily sets the Perl version to use.
 
+### plenv
+
+  - `plv` manages Perl environments.
+  - `plvc` List all available plenv commands.
+  - `plvl` Set or show the local application-specific Perl version.
+  - `plvg` Set or show the global Perl version.
+  - `plvs` Set or show the shell-specific Perl version.
+  - `plvi` Install a Perl version using the perl-build plugin.
+  - `plvu` Uninstall a specific Perl version.
+  - `plvr` Rehash plenv shims (run this after installing executables).
+  - `plvv` Show the current Perl version and its origin.
+  - `plvV` List all Perl versions available to plenv.
+  - `plvw` Display the full path to an executable.
+  - `plvW` List all Perl versions that contain the given executable.
+  - `plvm` List cpan modules in current perl.
+  - `plvM` Migrate cpan modules from other version.
+  - `plvI` Install cpanm.
+
+Functions
+---------
+
+  - `perl-info` exposes information about the Perl environment via the
+    `$perl_info` associative array.
+
+Theming
+-------
+
+To display the name of the currach Perl version in a prompt, define the
+following style in the `prompt_name_setup` function.
+
+    # %v - perl version.
+    zstyle ':prezto:module:perl:info:version' format 'version:%v'
+
+Then add `$perl_info[version]` to `$PROMPT` or `$RPROMPT` and call
+`perl-info` in the `prompt_name_precmd` hook function.
+
 Authors
 -------
 
-*The authors of this module should be contacted via the [issue tracker][3].*
+*The authors of this module should be contacted via the [issue tracker][4].*
 
   - [Sorin Ionescu](https://github.com/sorin-ionescu)
 
 [1]: http://www.perl.org
 [2]: http://perlbrew.pl
-[3]: https://github.com/sorin-ionescu/prezto/issues
+[3]: https://github.com/tokuhirom/plenv
+[4]: https://github.com/sorin-ionescu/prezto/issues

modules/perl/functions/perl-info

@@ -0,0 +1,30 @@
+#
+# Exposes information about the Perl environment via the $perl_info associative
+# array.
+#
+# Authors:
+#   JINNOUCHI Yasushi <delphinus@remora.cx>
+#
+
+local version
+local version_format
+local version_formatted
+
+# Clean up previous $perl_info.
+unset perl_info
+typeset -gA perl_info
+
+if (( $+commands[perlbrew] )); then
+  version="${PERLBREW_PERL##*perl-}"
+elif (( $+commands[plenv] )); then
+  version=$(plenv version-name)
+elif (( $+commands[perl] )); then
+  version=$(perl -e 'printf "%vd", $^V')
+fi
+
+# Format version.
+if [[ -n "$version" ]]; then
+  zstyle -s ':prezto:module:perl:info:version' format 'version_format'
+  zformat -f version_formatted "$version_format" "v:$version"
+  perl_info[version]="$version_formatted"
+fi

modules/perl/init.zsh

@@ -10,6 +10,29 @@ if (( ! $+commands[perl] )); then
   return 1
 fi
 
+#
+# Load Perlbrew or plenv
+#
+
+# Load Perlbrew into the shell session.
+if [[ -s "${PERLBREW_ROOT:-$HOME/perl5/perlbrew}/etc/bashrc" ]]; then
+  source "${PERLBREW_ROOT:-$HOME/perl5/perlbrew}/etc/bashrc"
+
+  # Load Perlbrew completion.
+  if [[ -s "${PERLBREW_ROOT:-$HOME/perl5/perlbrew}/etc/perlbrew-completion.bash" ]]; then
+    source "${PERLBREW_ROOT:-$HOME/perl5/perlbrew}/etc/perlbrew-completion.bash"
+  fi
+
+# Load manually installed plenv into the shell session.
+elif [[ -s "$HOME/.plenv/bin/plenv" ]]; then
+  path=("$HOME/.plenv/bin" $path)
+  eval "$(plenv init - --no-rehash zsh)"
+
+# Load package manager installed plenv into the shell session.
+elif (( $+commands[plenv] )); then
+  eval "$(plenv init - --no-rehash zsh)"
+fi
+
 #
 # Local Module Installation
 #
@@ -41,6 +64,7 @@ alias pld='perldoc'
 alias ple='perl -wlne'
 
 # Perlbrew
+if (( $+commands[perlbrew] )); then
   alias plb='perlbrew'
   alias plba='perlbrew available'
   alias plbi='perlbrew install'
@@ -50,3 +74,21 @@ alias plbO='perlbrew switch-off'
   alias plbs='perlbrew switch'
   alias plbu='perlbrew use'
   alias plbx='perlbrew uninstall'
+
+elif (( $+commands[plenv] )); then
+  alias plv='plenv'
+  alias plvc='plenv commands'
+  alias plvl='plenv local'
+  alias plvg='plenv global'
+  alias plvs='plenv shell'
+  alias plvi='plenv install'
+  alias plvu='plenv uninstall'
+  alias plvr='plenv rehash'
+  alias plvv='plenv version'
+  alias plvV='plenv versions'
+  alias plvw='plenv which'
+  alias plvW='plenv whence'
+  alias plvm='plenv list-modules'
+  alias plvM='plenv migrate-modules'
+  alias plvI='plenv install-cpanm'
+fi