Ensure correct tools installation in goenv mode (#332)

* Ensure correct tools installation in goenv mode

Tools will be installed in appropriated directory when
[goenv](https://github.com/syndbg/goenv) manages
GOPATH.

* Check goenv existence with which

* Try better (?) goenv detection command

* Do not check if tool is installed twice

Once a tool is known to be installed, that information is cached in
utils.installed_tools.

* Wait 500ms for action to take effect in tests

lua/go/install.lua

@@ -35,16 +35,38 @@ for tool, _ in pairs(url) do
 end
 
 local function is_installed(bin)
-  local env_path = os.getenv('PATH')
+  if utils.installed_tools[bin] then
-  if vim.fn.executable(bin) == 1 then
     return true
   end
+
   local sep = utils.sep2()
   local ext = utils.ext()
+
+
+  if utils.goenv_mode() then
+    local cwd = vim.fn.getcwd()
+    local cmd = "cd " .. cwd .. " && goenv which " .. bin .. " 2>&1"
+
+    local status = os.execute(cmd)
+
+    if status == 0 then
+      utils.installed_tools[bin] = true
+      return true
+    end
+    return false
+  end
+
+  if vim.fn.executable(bin) == 1 then
+    utils.installed_tools[bin] = true
+    return true
+  end
+
+  local env_path = os.getenv('PATH')
   local base_paths = vim.split(env_path, sep, true)
 
   for _, value in pairs(base_paths) do
     if uv.fs_stat(value .. DIR_SEP .. bin .. ext) then
+      utils.installed_tools[bin] = true
       return true
     end
   end
@@ -63,6 +85,9 @@ local function go_install_sync(pkg)
 
   u = u .. '@latest'
   local setup = { 'go', 'install', u }
+  if utils.goenv_mode() then
+    setup = { 'goenv', 'exec', 'go', 'install', u }
+  end
   local output = vim.fn.system(table.concat(setup, ' '))
   if vim.v.shell_error ~= 0 then
     vim.notify('install ' .. pkg .. ' failed: ' .. output, vim.log.levels.ERROR)
@@ -83,6 +108,9 @@ local function go_install(pkg)
 
   u = u .. '@latest'
   local setup = { 'go', 'install', u }
+  if utils.goenv_mode() then
+    setup = { 'goenv', 'exec', 'go', 'install', u }
+  end
 
   vim.fn.jobstart(setup, {
     on_stdout = function(_, data, _)

lua/go/utils.lua

@@ -47,6 +47,7 @@ function util.ext()
   end
   return ''
 end
+
 local function get_path_sep()
   if is_windows then
     return ';'
@@ -291,7 +292,8 @@ util.log = function(...)
   end
 end
 
-util.trace = function(...) end
+util.trace = function(...)
+end
 
 local rhs_options = {}
 
@@ -652,6 +654,7 @@ function util.get_active_buf()
 
   return result
 end
+
 -- for l:item in l:blist
 --     "skip unnamed buffers; also skip hidden buffers?
 --     if empty(l:item.name) || l:item.hidden
@@ -828,7 +831,6 @@ util.extract_filepath = function(msg, pkg_path)
   msg = msg or ''
   -- util.log(msg)
   --[[     or [[    findAllSubStr_test.go:234: Error inserting caseResult1: operation error DynamoDB: PutItem, exceeded maximum number of attempts]]
-
   -- or 'path/path2/filename.go:50:11: Error invaild
   -- or /home/ray/go/src/github/sample/app/driver.go:342 +0x19e5
   local ma = fn.matchlist(msg, [[\v\s*(\w+.+\.go):(\d+):]])
@@ -907,4 +909,21 @@ util.remove_ansi_escape = function(str)
   return str
 end
 
+-- Keeps track of tools that are already installed.
+-- The keys are the names of tools and the values are booleans 
+-- indicating whether the tools is available or not.
+util.installed_tools = {}
+
+-- Check if host has goenv in path.
+util.goenv_mode = function()
+  if is_windows then
+    -- always return false for Windows because goenv doesn't seem to be supported there.
+    return false
+  end
+
+  local cmd = "command -v goenv > /dev/null 2>&1"
+  local status = os.execute(cmd)
+  return status == 0
+end
+
 return util

lua/tests/go_tags_spec.lua

@@ -6,6 +6,9 @@ local cur_dir = vim.fn.expand("%:p:h")
 -- local status = require("plenary.reload").reload_module("go.nvim")
 -- status = require("plenary.reload").reload_module("nvim-treesitter")
 
+-- time to wait for action to take effect
+local wait_time = 500
+
 -- local ulog = require('go.utils').log
 describe("should run gotags", function()
   local cmd
@@ -37,7 +40,7 @@ describe("should run gotags", function()
     local gotags = require("go.tags")
     gotags.add()
     -- enable the channel response
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
     local fmt = vim.fn.join(vim.fn.readfile(name), "\n")
     -- ulog("tagged file: " .. fmt)
@@ -71,13 +74,13 @@ describe("should run gotags", function()
     local gotags = require("go.tags")
     gotags.rm('json')
     -- enable the channel response
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
 
     -- format the code
     local gofmt = require("go.format")
     gofmt.gofmt()
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
     local fmt = vim.fn.join(vim.fn.readfile(name), "\n")
     -- ulog("tagged file: " .. fmt)
@@ -111,12 +114,12 @@ describe("should run gotags", function()
     local gotags = require("go.tags")
     gotags.rm()
     -- enable the channel response
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
 
     local gofmt = require("go.format")
     gofmt.gofmt()
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
 
     local fmt = vim.fn.join(vim.fn.readfile(name), "\n")
@@ -152,12 +155,12 @@ describe("should run gotags", function()
     local gotags = require("go.tags")
     gotags.rm()
     -- enable the channel response
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
 
     local gofmt = require("go.format")
     gofmt.gofmt()
-    vim.wait(100, function()
+    vim.wait(wait_time, function()
     end)
 
     local fmt = vim.fn.join(vim.fn.readfile(name), "\n")