plugins/nvm: Fix docs, clean up code, and add license

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>

plugins/nvm/README.md

@@ -38,12 +38,12 @@ completions=(
 
 ## `.nvmrc` autoload
 
-If set, the plugin will automatically load a node version when if finds a
+If set, the plugin will automatically load a node version when it finds a
 `.nvmrc` file[3] in the current working directory indicating which node version to load.
-This can be done adding the following to your `.bashrc`:
+This can be done by adding the following to your `.bashrc`:
 
 ```bash
-export OMB_PLUGIN_NVM_AUTO_USE=true
+OMB_PLUGIN_NVM_AUTO_USE=true
 ```
 
 [1]: https://github.com/nvm-sh/nvm

plugins/nvm/nvm.plugin.sh

@@ -10,59 +10,90 @@
 # Try to load nvm only if command not already available
 if ! _omb_util_command_exists nvm; then
   # shellcheck source=/dev/null
-  [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+  [[ -s $NVM_DIR/nvm.sh ]] && source "$NVM_DIR/nvm.sh"
 fi
 
+#------------------------------------------------------------------------------
 # Optional .nvmrc autoload
-if _omb_util_command_exists nvm && [[ ${OMB_PLUGIN_NVM_AUTO_USE} == true ]]; then
-  find-up () {
-    path=$(pwd)
-    while [[ "$path" != "" && ! -e "$path/$1" ]]; do
-        path=${path%/*}
+#
+# This part is originally from the official nvm documentation
+# (README.md).  Here is the license of the original project:
+#
+# The MIT License (MIT)
+#
+# Copyright (c) 2010 Tim Caswell
+# Copyright (c) 2014 Jordan Harband
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation files
+# (the "Software"), to deal in the Software without restriction,
+# including without limitation the rights to use, copy, modify, merge,
+# publish, distribute, sublicense, and/or sell copies of the Software,
+# and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+if _omb_util_command_exists nvm && [[ ${OMB_PLUGIN_NVM_AUTO_USE-} == true ]]; then
+  _omb_plugin_nvm_find_up() {
+    local path=$PWD
+    while [[ $path && ! -e $path/$1 ]]; do
+      path=${path%/*}
     done
     echo "$path"
   }
   
-  cdnvm(){
-    cd "$@" || return $?
-    nvm_path=$(find-up .nvmrc | tr -d '\n')
+  _omb_plugin_nvm_cd(){
+    cd "$@" || return "$?"
+    local nvm_path=$(_omb_plugin_nvm_find_up .nvmrc)
 
     # If there are no .nvmrc file, use the default nvm version
-    if [[ ! $nvm_path = *[^[:space:]]* ]]; then
+    if [[ $nvm_path != *[^[:space:]]* ]]; then
 
-      declare default_version;
-      default_version=$(nvm version default);
+      local default_version
+      default_version=$(nvm version default)
 
       # If there is no default version, set it to `node`
       # This will use the latest version on your machine
       if [[ $default_version == "N/A" ]]; then
-          nvm alias default node;
-          default_version=$(nvm version default);
+        nvm alias default node
+        default_version=$(nvm version default)
       fi
 
       # If the current version is not the default version, set it to use the default version
       if [[ $(nvm current) != "$default_version" ]]; then
-          nvm use default;
+        nvm use default
       fi
 
     elif [[ -s $nvm_path/.nvmrc && -r $nvm_path/.nvmrc ]]; then
-      declare nvm_version
-      nvm_version=$(<"$nvm_path"/.nvmrc)
+      local nvm_version
+      nvm_version=$(< "$nvm_path"/.nvmrc)
 
       # Add the `v` suffix if it does not exists in the .nvmrc file
       if [[ $nvm_version != v* ]]; then
-          nvm_version="v""$nvm_version"
+        nvm_version=v$nvm_version
       fi
 
       # If it is not already installed, install it
-      if [[ $(nvm ls "$nvm_version" | tr -d '[:space:]') == "N/A" ]]; then
-          nvm install "$nvm_version";
+      if nvm ls "$nvm_version" | grep -qx '[[:space:]]*N/A[[:space:]]*'; then
+        nvm install "$nvm_version"
       fi
 
       if [[ $(nvm current) != "$nvm_version" ]]; then
-          nvm use "$nvm_version";
+        nvm use "$nvm_version"
       fi
     fi
   }
-  alias cd='cdnvm'
+  alias cd='_omb_plugin_nvm_cd'
 fi
+#------------------------------------------------------------------------------