Configure compilation DB path by request from SonarLint server

Try to find it automatically in one of the parent directories,
ask user for it, otherwise.

Makefile

@@ -3,7 +3,7 @@ SHELL := /usr/bin/env bash
 EMACS ?= emacs
 EASK ?= eask
 
-TEST-FILES := $(shell ls test/*.el)
+TEST-FILES := $(shell ls test/*-test.el)
 
 .PHONY: clean checkdoc lint package install compile download-sonarlint test
 

fixtures/compdb/dir1/1.cpp

@@ -0,0 +1 @@
+int x;

fixtures/compdb/dir1/compile_commands.json

@@ -0,0 +1 @@
+{}

fixtures/compdb/dir1/dir11/11.cpp

@@ -0,0 +1 @@
+int x;

fixtures/compdb/dir1/dir11/compile_commands.json

@@ -0,0 +1 @@
+{}

fixtures/compdb/dir1/dir12/12.cpp

@@ -0,0 +1 @@
+int x;

fixtures/compdb/dir1/dir12/dir121/121.cpp

@@ -0,0 +1 @@
+int x;

fixtures/compdb/no-compdb/no-compdb.cpp

@@ -0,0 +1 @@
+int x;

lsp-sonarlint.el

@@ -117,12 +117,43 @@ e.g. `-Xmx1024m`."
   :group 'lsp-sonarlint
   :type 'string)
 
-(defcustom lsp-sonarlint-cfamily-compile-commands-path
-  "${workspaceFolder}/compile_commands.json"
-  "Location of the compile_commands.json file.
-It is needed in C/C++ to provide your compilation options."
+ (defun lsp-sonarlint--find-file-in-parent-folders (fname)
+   "Find the closest FNAME in a buffer folder or one of its parents.
+ Traverse the parent folders from narrow to wide (/a/b/c, /a/b, /a, /).
+ If none of them contains FNAME, return nil."
+   (let ((dir (file-name-directory (expand-file-name (buffer-file-name))))
+         (found-file nil))
+     (while (not (or found-file (string-empty-p dir) (string-equal dir "/")))
+       (let ((potential-file (concat dir fname)))
+         (message potential-file)
+         (if (file-exists-p potential-file)
+             (setq found-file potential-file)
+           (setq dir (file-name-directory (directory-file-name dir))))))
+     found-file))
+
+(defcustom-lsp lsp-sonarlint-path-to-compile-commands ""
+  "Path to the compilation DB - the compile_commands.json file."
+  :type 'path
   :group 'lsp-sonarlint
-  :type 'file)
+  :lsp-path "sonarlint.pathToCompileCommands")
+
+ (defun lsp-sonarlint--get-compile-commands ()
+   "Find compile_commands.json in the parent dir or ask user."
+   (or (lsp-sonarlint--find-file-in-parent-folders "compile_commands.json")
+       (read-file-name "Provide path to compile_commands.json for this project: ")))
+
+ (defun lsp-sonarlint--set-compile-commands (_workspace _params)
+   "Find compile_commands.json and set it for the workspace.
+ As a side effect it will also send the found path to the SonarLint server."
+   (let ((fname (lsp-sonarlint--get-compile-commands)))
+     (unless (string-empty-p fname)
+       (message "Using compilation database from %s." fname)
+       (custom-set-variables `(lsp-sonarlint-path-to-compile-commands ,(expand-file-name fname))))))
+
+(defun lsp-sonarlint-set-compile-commands (fname)
+  "Set FNAME as the path to the compile_commands.json file for current session."
+  (interactive "fCompilation DB path: ")
+  (custom-set-variables `(lsp-sonarlint-path-to-compile-commands ,(expand-file-name fname))))
 
 (defconst lsp-sonarlint-go-doc-url "https://www.sonarsource.com/go/"
   "Documentation sonarsource URL.")
@@ -324,7 +355,6 @@ See `lsp-sonarlint-analyze-folder' to see which files are ignored."
 (lsp-register-custom-settings
  '(("sonarlint.disableTelemetry" lsp-sonarlint-disable-telemetry)
    ("sonarlint.testFilePattern" lsp-sonarlint-test-file-pattern)
-   ("sonarlint.pathToCompileCommands" lsp-sonarlint-cfamily-compile-commands-path)
    ("sonarlint.output.showAnalyzerLogs" lsp-sonarlint-show-analyzer-logs)
    ("sonarlint.output.verboseLogs" lsp-sonarlint-verbose-logs)
    ("sonarlint.ls.vmargs" lsp-sonarlint-vmargs)))
@@ -380,8 +410,7 @@ See REQUEST-HANDLERS in lsp--client in lsp-mode."
    ("sonarlint/readyForTests" #'ignore)
    ;; Sent by cfamily for analysis of C/C++ files. Sonar requires your
    ;; build commands specified in a compile_commands.json
-   ("sonarlint/needCompilationDatabase" (lambda(&rest _)
-                                          (warn "Sonar could not find your compile_commands.json, please check `lsp-sonarlint-cfamily-compile-commands-path'")))
+   ("sonarlint/needCompilationDatabase" #'lsp-sonarlint--set-compile-commands)
    ;; This is probably just to raise awareness of the new kind of issues:
    ;; secrets. That'd be too booring to implement. Hopefully, the user is
    ;; paying attention and will notice anyway.
@@ -398,18 +427,19 @@ See NOTIFICATION-HANDLERS in lsp--client in lsp-mode.")
   :priority -1
   :request-handlers lsp-sonarlint--request-handlers
   :notification-handlers lsp-sonarlint--notification-handlers
-  :multi-root t
+  :multi-root nil
   :add-on? t
   :server-id 'sonarlint
   :action-handlers (ht<-alist lsp-sonarlint--action-handlers)
   :initialization-options (lambda ()
-			    (list
-			     :productKey "emacs"
-			     :productName "Emacs"))
+                            (list
+                             :productKey "emacs"
+                             :productName "Emacs"))
   :initialized-fn (lambda (workspace)
                     (with-lsp-workspace workspace
                       (lsp--set-configuration
-                       (lsp-configuration-section "sonarlint"))))))
+                       (lsp-configuration-section "sonarlint"))))
+  :synchronize-sections '("sonarlint")))
 
 (provide 'lsp-sonarlint)
 ;;; lsp-sonarlint.el ends here

test/lsp-sonarlint-cpp-test.el

@@ -0,0 +1,53 @@
+;;; lsp-sonarlint-cpp-test.el --- CFamily analyzer-specific tests for Sonarlint LSP client   -*- lexical-binding: t; -*-
+;;;
+;; Author: Arseniy Zaostrovnykh
+;; Created: 11 July 2023
+;; License: GPL-3.0-or-later
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;; Tests for the C++-specific integration of the LSP mode and SonarLint language server.
+
+;;; Code:
+
+(require 'lsp-mode)
+(require 'lsp-sonarlint)
+(load-file (expand-file-name "lsp-sonarlint-test-utils.el"
+                             (file-name-directory (or load-file-name (buffer-file-name)))))
+
+(defun lsp-sonarlint--get-compdb-for-sample-file (cpp-file)
+  "Relative to fixtures folder, get compile_commands.json for CPP-FILE."
+  (let ((buf (find-file-noselect (lsp-sonarlint-sample-file cpp-file))))
+    (with-current-buffer buf
+     (file-relative-name (lsp-sonarlint--get-compile-commands)
+                         (lsp-sonarlint-fixtures-dir)))))
+
+(ert-deftest lsp-sonarlint--get-compile-commands-test ()
+  (should (equal (lsp-sonarlint--get-compdb-for-sample-file "compdb/dir1/1.cpp")
+                 "compdb/dir1/compile_commands.json"))
+  (should (equal (lsp-sonarlint--get-compdb-for-sample-file "compdb/dir1/dir11/11.cpp")
+                 "compdb/dir1/dir11/compile_commands.json"))
+  (should (equal (lsp-sonarlint--get-compdb-for-sample-file "compdb/dir1/dir12/12.cpp")
+                 "compdb/dir1/compile_commands.json"))
+  (should (equal (lsp-sonarlint--get-compdb-for-sample-file "compdb/dir1/dir12/dir121/121.cpp")
+                 "compdb/dir1/compile_commands.json")))
+
+(ert-deftest lsp-sonarlint--get-compile-commands-interactive-test ()
+  (cl-letf (((symbol-function 'read-file-name) (lambda (_prompt)
+                                                 (concat (lsp-sonarlint-fixtures-dir) "my_db.json"))))
+  (should (equal (lsp-sonarlint--get-compdb-for-sample-file "compdb/no-compdb/no-compdb.cpp")
+                 "my_db.json"))))
+
+;;; lsp-sonarlint-cpp-test.el ends here

test/lsp-sonarlint-integration-test.el

@@ -27,6 +27,8 @@
 
 (require 'lsp-mode)
 (require 'lsp-sonarlint)
+(load-file (expand-file-name "lsp-sonarlint-test-utils.el"
+                             (file-name-directory (or load-file-name (buffer-file-name)))))
 
 (ert-deftest lsp-sonarlint-plugin-downloaded ()
   "Check whether you have downloaded SonarLint.
@@ -110,17 +112,6 @@ only works for specific textDocument/didOpen:languageId."
   (sort (mapcar (lambda (issue) (gethash "code" issue)) issues) #'string-lessp))
 
 
-(defun lsp-sonarlint--fixtures-dir ()
-  "Directory of the test fixtures for these tests."
-  (concat
-   (file-name-directory
-    (directory-file-name (file-name-directory (symbol-file #'lsp-sonarlint--fixtures-dir))))
-   "fixtures/"))
-
-(defun lsp-sonarlint--sample-file (fname)
-  "Get the full path of the sample file FNAME."
-  (concat (lsp-sonarlint--fixtures-dir) fname))
-
 (defun lsp-sonarlint--get-all-issue-codes (sample-filename &optional major-mode)
   "Get all SonarLint issue-codes for given SAMPLE-FILENAME.
 This functions takes some time to wait for the LSP mode to init
@@ -129,7 +120,7 @@ MAJOR-MODE specifies the major mode enabled to trigger the analysis.
 Some analyzers like cfamily require specific major-modes.
 If nil, use python-mode by default."
   (lsp-sonarlint--exec-with-diags
-   (lsp-sonarlint--sample-file sample-filename)
+   (lsp-sonarlint-sample-file sample-filename)
    (lambda (diags)
      (lsp-sonarlint--get-codes-of-issues diags))
    (if major-mode major-mode 'python-mode)))
@@ -185,7 +176,7 @@ If nil, use python-mode by default."
 
 (ert-deftest lsp-sonarlint-c++-reports-issues ()
   "Check that LSP can get go SonarLint issues for a C++ file."
-  (should (equal (lsp-sonarlint--get-all-issue-codes "sample.cpp" 'c++-mode)
+  (should (equal (lsp-sonarlint--get-all-issue-codes "cpp/sample.cpp" 'c++-mode)
                  '("cpp:S995"))))
 
 (defun lsp-sonarlint--find-descr-action-at-point ()
@@ -217,7 +208,7 @@ If nil, use python-mode by default."
 (ert-deftest lsp-sonarlint-display-rule-descr-test ()
   "Check whether you can display rule description for a SonarLint issue."
   (lsp-sonarlint--exec-with-diags
-   (lsp-sonarlint--sample-file "sample.py")
+   (lsp-sonarlint-sample-file "sample.py")
    (lambda (diags)
      (lsp-sonarlint--go-to-first-diag diags)
      (let ((descr-action (lsp-sonarlint--find-descr-action-at-point)))

test/lsp-sonarlint-test-utils.el

@@ -0,0 +1,38 @@
+;;; integration.el --- Integration tests for Sonarlint LSP client   -*- lexical-binding: t; -*-
+;;;
+;; Author: Arseniy Zaostrovnykh
+;; Created: 11 July 2023
+;; License: GPL-3.0-or-later
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;; Utility functions for the LSP SonarLint tests.
+
+;;; Code:
+
+(defun lsp-sonarlint-fixtures-dir ()
+  "Directory of the test fixtures for these tests."
+  (concat
+   (file-name-directory
+    (directory-file-name (file-name-directory (symbol-file #'lsp-sonarlint-fixtures-dir))))
+   "fixtures/"))
+
+(defun lsp-sonarlint-sample-file (fname)
+  "Get the full path of the sample file FNAME."
+  (concat (lsp-sonarlint-fixtures-dir) fname))
+
+(provide 'lsp-sonarlint-test-utils)
+
+;;; lsp-sonarlint-test-utils.el ends here