irony-cdb-menu is empty after creating compile_commands.json with cmake

[vermiculus]

This is a separate thread to resolve my follow-up question in #167 – clearly I'm doing something wrong, but I can't find further documentation that explains what this could be.

This is the first time I've seriously tried to make irony-mode work; I've played with it before with no significant success, but it will be necessary for my current project.

---

When I run irony-cdb-menu from a directory where a non-empty ./compile_commands.json exists (as created by cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ., it comes up empty:

No compilation database in use.

[q] to quit

[Sarcasm]

Where is located your build directory?

Right now irony-mode looks up starting from the current directory and tries a build/ subdirectory.

Where is your compilation database relative to your source file?

Did you use irony-cdb-json-add-compile-commands-path if it's in a "non-standard" location?

Did you reloaded the file or re-ran irony-cdb-autosetup-compile-options?

[vermiculus]

My build directory seems to be .. The compilation database is a sibling of the source file in the directory tree. I've not configured anything with irony-cdb-json-add-compile-commands-path. Running irony-cdb-autosetup-compile-options gives the error

Irony CDB: error in compilation database: (wrong-type-argument stringp nil)

with backtrace

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  string-match("[\\\"]\\| " nil)
  #[257 "\301\300\"\203\302\303\304\305#\302Q\207\207" ["[\\\"]\\| " string-match "\"" replace-regexp-in-string "[\\\"]" "\\\\\\&"] 6 "\n\n(fn STR)"](nil)
  mapconcat(#[257 "\301\300\"\203\302\303\304\305#\302Q\207\207" ["[\\\"]\\| " string-match "\"" replace-regexp-in-string "[\\\"]" "\\\\\\&"] 6 "\n\n(fn STR)"] ("get-compile-options" "/Users/sean/github/emacs-libgit2/" nil) " ")
  combine-and-quote-strings(("get-compile-options" "/Users/sean/github/emacs-libgit2/" nil))
  irony--send-request("get-compile-options" (irony--sync-request-callback 1) "/Users/sean/github/emacs-libgit2/" nil)
  apply(irony--send-request "get-compile-options" (irony--sync-request-callback 1) ("/Users/sean/github/emacs-libgit2/" nil))
  irony--send-request-sync("get-compile-options" "/Users/sean/github/emacs-libgit2/" nil)
  irony-cdb-libclang--server-exact-flags("/Users/sean/github/emacs-libgit2/compile_commands.json")
  irony-cdb-libclang--get-compile-options()
  irony-cdb-libclang(get-compile-options)
  irony-cdb--autodetect-compile-options()
  irony-cdb-autosetup-compile-options()
  funcall-interactively(irony-cdb-autosetup-compile-options)
  call-interactively(irony-cdb-autosetup-compile-options record nil)
  command-execute(irony-cdb-autosetup-compile-options record)
  #[257 "\304\305!\203\f\306\307!!\210\307
!\211\310\307!\311\")\207" [current-prefix-arg prefix-arg this-command real-this-command featurep smex smex-rank intern command-execute record] 4 "\n\n(fn CMD)"]("irony-cdb-autosetup-compile-options")
  ivy-call()
  <...>
  counsel-M-x()
  funcall-interactively(counsel-M-x)
  call-interactively(counsel-M-x nil nil)
  command-execute(counsel-M-x)

---

Here is a condensed ls -l with unrelated files removed:

/Users/sean/github/emacs-libgit2:
total used in directory 1740 available 4291560854
drwxr-xr-x 27 sean staff     918 Oct 15 10:52 .
drwxr-xr-x 38 sean staff    1292 Oct 12 23:37 ..
drwxr-xr-x 16 sean staff     544 Oct 15 10:52 .git
-rw-r--r--  1 sean staff   18700 Oct 15 10:51 CMakeCache.txt
drwxr-xr-x 17 sean staff     578 Oct 15 10:51 CMakeFiles
-rw-r--r--  1 sean staff     859 Sep 20 12:23 CMakeLists.txt
-rw-r--r--  1 sean staff    7658 Oct 15 10:51 Makefile
-rw-r--r--  1 sean staff    1412 Sep 20 12:25 cmake_install.cmake
-rw-r--r--  1 sean staff  121787 Oct 15 10:51 compile_commands.json
drwxr-x---  3 sean staff     102 Sep 20 12:25 include
drwxr-xr-x 38 sean staff    1292 Oct 15 10:51 libgit2
-rw-r--r--  1 sean staff    2548 Oct 15 10:52 libgit2-core.c
-rw-r--r--  1 sean staff     535 Oct 15 10:13 libgit2.el
drwxr-xr-x  8 sean staff     272 Oct 15 10:13 test
-rw-r--r--  1 sean staff      19 Oct 15 10:22 test-it.el
drwxr-xr-x  5 sean staff     170 Sep 20 12:23 test2

I've honestly not done much; to reproduce my directory completely, you should be able to

git clone git@github.com:ksjogo/emacs-libgit2.git
cd emacs-libgit2
git submodule update --init --recursive
cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON .
make

[vermiculus]

However, after running irony-cdb-autosetup-compile-options (even with it producing an error), irony-cdb-menu now shows a database.

[Sarcasm]

It looks like the error appears because buffer-file-name is nil.

Can you show the output of:

C-h v buffer-file-name RET

[vermiculus]

I was in a magit-status buffer, so that explains that. Where should I ideally run it from?

[Sarcasm]

The suggested default configuration (https://github.com/Sarcasm/irony-mode/tree/4b63b809c9643b90d396cbcc1ed0a53659888f4d#configuration) will run it as a hook when you open a C/C++ file.

It should be run in a buffer where irony-mode is active.

However, don't close this issue. We should support nil buffer-file-name, it happens when a new file has been created and is not yet saved to disk for example.

[vermiculus]

Don't worry, I won't close the issue. All unhandled errors are usually not ideal :)

One extra piece of information, though – when I run it from an irony-mode C buffer, emacs appears to hang:

Debugger entered--Lisp error: (quit)
  irony--send-request-sync("get-compile-options" "/Users/sean/github/emacs-libgit2/" "/Users/sean/github/emacs-libgit2/libgit2-core.c")
  irony-cdb-libclang--server-exact-flags("/Users/sean/github/emacs-libgit2/compile_commands.json")
  irony-cdb-libclang--get-compile-options()
  irony-cdb-libclang(get-compile-options)
  irony-cdb--autodetect-compile-options()
  irony-cdb-autosetup-compile-options()
  funcall-interactively(irony-cdb-autosetup-compile-options)
  call-interactively(irony-cdb-autosetup-compile-options record nil)

[Sarcasm]

Does irony-server works?

~/.emacs.d/irony/bin/irony-server --version

[vermiculus]

irony-server version 0.2.0
clang version 3.8.1 (tags/RELEASE_381/final)

[Sarcasm]

Does it happen even after you restart irony-server/emacs? Do you see anything in the log file in /tmp/irony.XXX?

[vermiculus]

/tmp/irony.XXX does not exist.

Restarting emacs did the trick… strange. Thanks for your help!

I'll leave this issue open to gracefully handle non-file buffers.

[baolonglin]

I met the same issue, but can't solve it by restarting emacs, the /tmp/irony.XXX is exist, saw message in that file:

(
(("/app/gcc/5.3.0/bin/g++" "-DCLANG_BUILTIN_HEADERS_DIR=\"/app/clang/3.8.0/lib/clang/3.8.0/include\"" "-fno-exceptions" "-O3" "-DNDEBUG" "-I/app/clang/3.8.0/include" "-I/local/workspace/irony-mode/server/src" "-std=c++11" "-Wall" "-Wextra" "-o" "CMakeFiles/irony-server.dir/Command.cpp.o" "-c" "/local/workspace/irony-mode/server/src/Command.cpp" ) . "/local/workspace/irony-mode/server/build/src")
)
;;EOT

The server process was started by emacs:

robin   2767  2082  0 15:29 ?        00:00:00 /bin/tcsh -c /home/robin/.emacs.d/irony/bin/irony-server -i 2> /tmp/irony.2017-04-05_15h-29m-54s.log
robin   2863  2767  0 15:29 ?        00:00:00 /home/robin/.emacs.d/irony/bin/irony-server -i 2

my irony server version is:

irony-server version 0.2.2-cvs
clang version 3.8.0 (tags/RELEASE_380/final)

It works fine if i run command manually, but it hangs at irony--send-request-sync. Fine means not hang at terminal, output same as the /tmp/irony.XXX

Any suggestion?

[Sarcasm]

The issue comes from tcsh, see https://github.com/Sarcasm/irony-mode/issues/299

[baolonglin]

works fine after change to be bash