Merge pull request #178 from fcrespo82/which_command

Add which command.

bin/asdf

@@ -8,6 +8,7 @@ source $(dirname $(dirname $0))/lib/commands/install.sh
 source $(dirname $(dirname $0))/lib/commands/uninstall.sh
 source $(dirname $(dirname $0))/lib/commands/current.sh
 source $(dirname $(dirname $0))/lib/commands/where.sh
+source $(dirname $(dirname $0))/lib/commands/which.sh
 source $(dirname $(dirname $0))/lib/commands/version_commands.sh
 source $(dirname $(dirname $0))/lib/commands/list.sh
 source $(dirname $(dirname $0))/lib/commands/list-all.sh
@@ -46,6 +47,9 @@ case $1 in
 "where")
     where_command $callback_args;;
 
+"which")
+    which_command $callback_args;;
+    
 "local")
     local_command $callback_args;;
 

completions/asdf.bash

@@ -32,7 +32,7 @@ _asdf () {
       fi
       ;;
     *)
-      local cmds='plugin-add plugin-list plugin-remove plugin-update install uninstall update current where list list-all local global reshim'
+      local cmds='plugin-add plugin-list plugin-remove plugin-update install uninstall update current where which list list-all local global reshim'
       COMPREPLY=($(compgen -W "$cmds" -- $cur))
       ;;
   esac

help.txt

@@ -13,6 +13,7 @@ MANAGE PACKAGES
   asdf uninstall <name> <version>      Remove a specific version of a package
   asdf current <name>                  Display current version set or being used for package
   asdf where <name> <version>          Display install path for an installed version
+  asdf which <name>                    Display install path for current version
   asdf local <name> <version>          Set the package local version
   asdf global <name> <version>         Set the package global version
   asdf list <name>                     List installed versions of a package

lib/commands/which.sh

@@ -0,0 +1,55 @@
+current_version() {
+  local plugin_name=$1
+
+  check_if_plugin_exists $plugin_name
+
+  local search_path=$(pwd)
+  local version_and_path=$(find_version "$plugin_name" "$search_path")
+  local version=$(cut -d '|' -f 1 <<< "$version_and_path");
+  local version_file_path=$(cut -d '|' -f 2  <<< "$version_and_path");
+
+  check_if_version_exists $plugin_name $version
+  check_for_deprecated_plugin $plugin_name
+
+  if [ -z "$version" ]; then
+    echo "No version set for $plugin_name"
+    exit 1
+  else
+    echo "$version"
+    exit 0
+  fi
+}
+
+which_command() {
+  local plugin_name=$1
+  local plugin_path=$(get_plugin_path $plugin_name)
+  check_if_plugin_exists $plugin_name
+  local install_type="version"
+
+  local install_path=$(get_install_path $plugin_name $install_type $(current_version $plugin_name))
+
+  if [ -d $install_path ]; then
+    echo $install_path/bin/$plugin_name
+    exit 0
+  else
+    echo "Version not installed"
+    exit 1
+  fi
+}
+
+# Warn if the plugin isn't using the updated legacy file api.
+check_for_deprecated_plugin() {
+  local plugin_name=$1
+
+  local plugin_path=$(get_plugin_path "$plugin_name")
+  local legacy_config=$(get_asdf_config_value "legacy_version_file")
+  local deprecated_script="${plugin_path}/bin/get-version-from-legacy-file"
+  local new_script="${plugin_path}/bin/list-legacy-filenames"
+
+  if [ "$legacy_config" = "yes" ] && [ -f $deprecated_script ] && [ ! -f $new_script ]; then
+    echo "Heads up! It looks like your $plugin_name plugin is out of date. You can update it with:"
+    echo ""
+    echo "  asdf plugin-update $plugin_name"
+    echo ""
+  fi
+}

test/which_command.bats

@@ -0,0 +1,38 @@
+#!/usr/bin/env bats
+
+load test_helpers
+
+. $(dirname $BATS_TEST_DIRNAME)/lib/commands/which.sh
+. $(dirname $BATS_TEST_DIRNAME)/lib/commands/install.sh
+
+setup() {
+  setup_asdf_dir
+  install_dummy_plugin
+  run install_command dummy 1.0
+
+  PROJECT_DIR=$HOME/project
+  mkdir $PROJECT_DIR
+}
+
+teardown() {
+  clean_asdf_dir
+}
+
+@test "which should show dummy 1.0 main binary path" {
+  cd $PROJECT_DIR
+
+  echo 'dummy 1.0' >> $PROJECT_DIR/.tool-versions
+
+  run current_version "dummy"
+  [ "$output" = "1.0" ]
+
+  run which_command "dummy"
+  [ "$status" -eq 0 ]
+  [ "$output" = "$ASDF_DIR/installs/dummy/1.0/bin/dummy" ]
+}
+
+@test "which should error when the plugin doesn't exist" {
+  run which_command "foobar"
+  [ "$status" -eq 1 ]
+  [ "$output" = "No such plugin" ]
+}