Allow insecure connections to Gitlab (#234)

This MR makes it possible to ignore bad x509 certificates when connecting to Gitlab, by creating a custom HTTP connection. The option is exposed via the setup function. This is a PATCH release.

README.md

@@ -92,6 +92,8 @@ gitlab_url=https://my-personal-gitlab-instance.com/
 
 The plugin will look for the `.gitlab.nvim` file in the root of the current project by default. However, you may provide a custom path to the configuration file via the `config_path` option. This must be an absolute path to the directory that holds your `.gitlab.nvim` file.
 
+For more settings, please see `:h gitlab.nvim.connecting-to-gitlab`
+
 ## Configuring the Plugin
 
 Here is the default setup function. All of these values are optional, and if you call this function with no values the defaults will be used:
@@ -108,6 +110,9 @@ require("gitlab").setup({
       imply_local = false, -- If true, will attempt to use --imply_local option when calling |:DiffviewOpen|
     },
   },
+  connection_settings = {
+    insecure = false, -- Like curl's --insecure option, ignore bad x509 certificates on connection
+  },
   help = "g?", -- Opens a help popup for local keymaps when a relevant view is focused (popup, discussion panel, etc)
   popup = { -- The popup for comment creation, editing, and replying
     exit = "<Esc>",

cmd/client.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"crypto/tls"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -18,6 +19,10 @@ type DebugSettings struct {
 	GoResponse bool `json:"go_response"`
 }
 
+type ConnectionOptions struct {
+	Insecure bool `json:"insecure"`
+}
+
 type ProjectInfo struct {
 	ProjectId string
 	MergeId   int
@@ -40,8 +45,8 @@ type Client struct {
 /* initGitlabClient parses and validates the project settings and initializes the Gitlab client. */
 func initGitlabClient() (error, *Client) {
 
-	if len(os.Args) < 6 {
-		return errors.New("Must provide gitlab url, port, auth token, debug settings, and log path"), nil
+	if len(os.Args) < 7 {
+		return errors.New("Must provide gitlab url, port, auth token, debug settings, log path, and connection settings"), nil
 	}
 
 	gitlabInstance := os.Args[1]
@@ -62,6 +67,14 @@ func initGitlabClient() (error, *Client) {
 		return fmt.Errorf("Could not parse debug settings: %w, %s", err, debugSettings), nil
 	}
 
+	/* Parse connection options */
+	connectionSettings := os.Args[6]
+	var connectionObject ConnectionOptions
+	err = json.Unmarshal([]byte(connectionSettings), &connectionObject)
+	if err != nil {
+		return fmt.Errorf("Could not parse connection settings: %w, %s", err, connectionSettings), nil
+	}
+
 	var apiCustUrl = fmt.Sprintf(gitlabInstance + "/api/v4")
 
 	gitlabOptions := []gitlab.ClientOptionFunc{
@@ -76,6 +89,16 @@ func initGitlabClient() (error, *Client) {
 		gitlabOptions = append(gitlabOptions, gitlab.WithResponseLogHook(responseLogger))
 	}
 
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{
+			InsecureSkipVerify: connectionObject.Insecure,
+		},
+	}
+
+	retryClient := retryablehttp.NewClient()
+	retryClient.HTTPClient.Transport = tr
+	gitlabOptions = append(gitlabOptions, gitlab.WithHTTPClient(retryClient.HTTPClient))
+
 	client, err := gitlab.NewClient(authToken, gitlabOptions...)
 
 	if err != nil {

doc/gitlab.nvim.txt

@@ -124,6 +124,8 @@ project by default. However, you may provide a custom path to the configuration
 file via the `config_path` option. This must be an absolute path to the
 directory that holds your `.gitlab.nvim` file.
 
+The `connection_settings` block in the `state.lua` file will be used to
+configure your connection to Gitlab.
 
 CONFIGURING THE PLUGIN                    *gitlab.nvim.configuring-the-plugin*
 

lua/gitlab/server.lua

@@ -13,19 +13,16 @@ M.start = function(callback)
   local port = state.settings.port or empty_port
   local parsed_port = nil
   local callback_called = false
-  local command = state.settings.bin
-    .. " "
-    .. state.settings.gitlab_url
-    .. " "
-    .. port
-    .. " "
-    .. state.settings.auth_token
-    .. " "
-    .. "'"
-    .. vim.json.encode(state.settings.debug)
-    .. "'"
-    .. " "
-    .. state.settings.log_path
+  local command = string.format(
+    "%s %s %s %s '%s' %s '%s'",
+    state.settings.bin,
+    state.settings.gitlab_url,
+    port,
+    state.settings.auth_token,
+    vim.json.encode(state.settings.debug),
+    state.settings.log_path,
+    vim.json.encode(state.settings.connection_settings)
+  )
 
   local job_id = vim.fn.jobstart(command, {
     on_stdout = function(_, data)

lua/gitlab/state.lua

@@ -20,6 +20,9 @@ M.settings = {
       imply_local = false,
     },
   },
+  connection_settings = {
+    insecure = true,
+  },
   attachment_dir = "",
   help = "g?",
   popup = {