feat: Displays a warning when a plugin from the tools-version list do…

…es not exist (#1033)

* feat: Displays a warning when the plugin from the tools-version does not exist

When calling the install command, it tried to look for versions for all
the plugins available and installed them. With this change, it will attempt to
find versions for all the installed plugins and plugins defined in the
`.tool-versions`.

Fixes #574

* feat: Changes the algorithm to detect not installed plugins

This patch changes the algorithm. It preserves the original logic for
the plugin resolution, but at the same time, reports entries with plugins not
available.

* fix: Addresses the pull request comments.

- Changes the comparison to be strict rather than partial.
- Prints a list of missing plugins.
- Exists if at least one plugin is not present.
- Adds unit tests.

lib/commands/command-install.bash

@@ -62,6 +62,7 @@ install_one_local_tool() {
     exit 1
   fi
 }
+
 install_local_tool_versions() {
   local plugins_path
   plugins_path=$(get_plugin_path)
@@ -70,12 +71,45 @@ install_local_tool_versions() {
   search_path=$(pwd)
 
   local some_tools_installed
+  local some_plugin_not_installed
+
+  local tool_versions_path
+  tool_versions_path=$(find_tool_versions)
 
+  # Locate all the plugins installed in the system
+  local plugins_installed
   if ls "$plugins_path" &>/dev/null; then
     for plugin_path in "$plugins_path"/*; do
       local plugin_name
       plugin_name=$(basename "$plugin_path")
+      plugins_installed="$plugins_installed $plugin_name"
+    done
+    plugins_installed=$(printf "%s" "$plugins_installed" | tr " " "\n")
+  fi
+
+  if [ -z "$plugins_installed" ]; then
+    printf "Install plugins first to be able to install tools\\n"
+    exit 1
+  fi
+
+  # Locate all the plugins defined in the versions file.
+  local tools_file
+  if [ -f "$tool_versions_path" ]; then
+    tools_file=$(strip_tool_version_comments "$tool_versions_path" | cut -d ' ' -f 1)
+    for plugin_name in $tools_file; do
+      if ! printf '%s\n' "${plugins_installed[@]}" | grep -q "^$plugin_name\$"; then
+        printf "%s plugin is not installed\n" "$plugin_name"
+        some_plugin_not_installed='yes'
+      fi
+    done
+  fi
 
+  if [ -n "$some_plugin_not_installed" ]; then
+    exit 1
+  fi
+
+  if [ -n "$plugins_installed" ]; then
+    for plugin_name in $plugins_installed; do
       local plugin_version_and_path
       plugin_version_and_path="$(find_versions "$plugin_name" "$search_path")"
 
@@ -88,9 +122,6 @@ install_local_tool_versions() {
         done
       fi
     done
-  else
-    printf "Install plugins first to be able to install tools\\n"
-    exit 1
   fi
 
   if [ -z "$some_tools_installed" ]; then

test/install_command.bats

@@ -133,6 +133,24 @@ teardown() {
   [ ! -f $ASDF_DIR/installs/dummy/1.1.0/version ]
 }
 
+@test "install_command fails if the plugin is not installed" {
+  cd $PROJECT_DIR
+  echo 'other_dummy 1.0.0' > $PROJECT_DIR/.tool-versions
+
+  run asdf install
+  [ "$status" -eq 1 ]
+  [ "$output" =  "other_dummy plugin is not installed" ]
+}
+
+@test "install_command fails if the plugin is not installed without collisions" {
+  cd $PROJECT_DIR
+  printf "dummy 1.0.0\ndum 1.0.0" > $PROJECT_DIR/.tool-versions
+
+  run asdf install
+  [ "$status" -eq 1 ]
+  [ "$output" =  "dum plugin is not installed" ]
+}
+
 @test "install_command fails when tool is specified but no version of the tool is configured in config file" {
   echo 'dummy 1.0.0' > $PROJECT_DIR/.tool-versions
   run asdf install other-dummy