I am using Emacs + matlab-mode as my Matlab development environment. I also have MTEST installed together with Matlab to run my unit tests - what I want to do now is to have a key binding that runs the tests from the current file in the matlab-shell I constantly have opened around (M-x matlab-shell).
What I have until now is:
; Runs the unit tests available in the current buffer
(defun run-matlab-test ()
(interactive)
(matlab-shell-run-command (concat "runtests "
(car (split-string (buffer-name) "\\.")))))
; Bind "C-c l" to running unit tests in matlab-mode
(defun map-run-matlab-test-keys ()
(local-set-key (kbd "C-c l") 'run-matlab-test))
(add-hook 'matlab-mode-hook 'map-run-matlab-test-keys)
What I need to do is in the run-matlab-test function to have a way of calling the runtests command with the parameter provided by the (buffer-name) command and all this should happen in the matlab shell I mentioned above. Any hints ?
Edit: I managed to get it working by calling matlab-shell-run-command. The caveat here is that it only works if the starting sequence is: open your unit-test.m file, from that file run M-x matlab-shell (this way matlab starts with the current working directory in the tests directory) and then you can use the above binding.
To avoid your caveat above, you could probably issue a cd to matlab, before calling runtest, by doing something like the following (untested):
(defun run-matlab-test ()
(interactive)
(matlab-shell-run-command (concat "cd " (file-name-directory (buffer-file-name))))
(matlab-shell-run-command (concat "runtests "
(car (split-string (buffer-name) "\\.")))))
Related
I'd like to run an interactive CLI program from within Clojure (e.g., vim) and be able to interact with it.
In bash and other programming languages, I can do that with
vim > `tty`
I tried to do the same in Clojure:
(require '[clojure.java.shell :as shell])
(shell/sh "vim > `tty`")
but it just opens vim without giving me tty.
Background: I'm developing a Clojure CLI tool which parses emails and lets a user edit the parsed data before saving them on the disk. It works the following way:
Read a file with email content and parse it. Each email is stored as a separate file.
Show a user the parsed data and let the user edit the data in vim. Internally I create a temporary file with the parsed data, but I don't mind doing it another way if that would solve my issue.
After a user finished editing the parsed data (they might decide to keep it as it is) append the data to a file on a disk. So all parsed data are saved to the same file.
Go to 1st step if there are any files with emails left.
This code relies on Clojure Java interop to make use of Java's ProcessBuilder class.
(defn -main
[]
;use doseq instead of for because for is lazily evaluated
(doseq [i [1 2 3]]
;extract current directory from system variable
(let [file-name (str "test" i ".txt")
working-directory (trim-newline (:out (sh "printenv" "PWD")))]
(spit file-name "")
;this is where fun begins. We use ProcessBuilder to forward commands to terminal
;we pass a list of commands and their arguments to its constructor
(let [process-builder (java.lang.ProcessBuilder. (list "vim" (str working-directory "/" file-name)))
;inherit is a configuration constant
inherit (java.lang.ProcessBuilder$Redirect/INHERIT)]
;we configure input, output and error redirection
(.redirectOutput process-builder inherit)
(.redirectError process-builder inherit)
(.redirectInput process-builder inherit)
;waitFor used to block execution until vim is closed
(.waitFor (.start process-builder))
)
;additional processing here
)
)
;not necessary but script tends to hang for around 30 seconds at end of its execution
;so this command is used to terminate it instantly
(System/exit 0)
)
I want something similar to Emacs C++, opening corresponding header file except that I want to
1) Always automatically open the corresponding header; and
2) Do that in another emacs instance (if someone came up with a solution that made all other emacs instances do this, it would be fine also.)
Note that I use emacs in the terminal mode so I can't do https://superuser.com/questions/102163/how-to-split-emacs-over-a-dual-monitor (or at least I do not know how).
A simple solution to 2) is to run an emacs instance with
server-mode enabled in the second terminal and command it from the
main emacs instance by using server-eval-at.
To launch the slave, run:
$ emacs --eval '(progn (setq server-name "ff-slave") (server-mode 1))'
Then use the following code to command it:
(require 'server)
(require 'find-file)
(defun command-ff-slave ()
(interactive)
(save-excursion
(let ((b (ff-other-file-name)))
(if (null b)
(message "Found no other file")
(server-eval-at "ff-slave"
`(find-file ,b))))))
Calling command-ff-slave from the main emacs instance
should open any related file in a new buffer on the slave server.
Because I use Emacs for many things these days I would like to only load cedet.el when I open a c/C++ source or header and not everytime emacs starts since it takes a significant toll on the startup time.
Right now the beginning of my init file looks like this:
(load-file "~/.emacs.d/plugins/cedet/common/cedet.el")
(semantic-load-enable-excessive-code-helpers)
;;(semantic-load-enable-semantic-debugging-helpers)
(setq senator-minor-mode-name "SN")
(setq semantic-imenu-auto-rebuild-directory-indexes nil)
(global-srecode-minor-mode 1)
(global-semantic-mru-bookmark-mode 1)
And it keeps going.
Is there a way to do this?
my emacs startup improved dramatically after i learned to use eval-after-load and autoload.
if you have a mode you only want loaded when you open a file of the type, add something like this to your .emacs (assuming foo-mode is defined in foo-mode.el on your load path):
(autoload 'foo-mode "foo-mode" nil t)
(add-to-list 'auto-mode-alist '("\\.foo\\'" . foo-mode))
if you have some helper libraries which you only want loaded after you load a "main" library, add something like this to your .emacs (assuming bar-mode is a secondary mode which enhances foo-mode):
(eval-after-load "foo-mode"
'(progn
(require 'bar-mode)
;; ... do other bar-mode setup here ...
))
so, in your case, you probably want to setup cedet using eval-after-load c++-mode.
You could do it like this:
(add-hook 'c-mode-common-hook (lambda ()
(load-file "~/.emacs.d/plugins/cedet/common/cedet.el")
;; any code dependent on having this file loaded
))
If loading the file (or doing the other commands) several times is a problem, you should of course first check whether this file was already loaded (either test for something defined in cedet.el, or maintain an is-loaded flag yourself).
Edit: Such a flag might look like this:
(setq need-to-load-cedet-p t)
(add-hook 'c-mode-common-hook (lambda ()
(if need-to-load-cedet-p
(progn (load-file "~/.emacs.d/plugins/cedet/common/cedet.el")
(setq need-to-load-cedet-p nil))
;; code that should only be executed once after cedet is loaded goes here
)
;; code that should be executed every time a new buffer is opened goes here
))
I am writing a text game in Clojure. I want the player to type lines at the console, and the game to respond on a line-by-line basis.
Research showed me that (read-line) is the way one is meant to get text lines from standard input in Clojure, but it is not working for me.
I am in a fresh Leiningen project, and I have added a :main clause to the project.clj pointing to the only source file:
(ns textgame.core)
(defn -main [& args]
(println "Entering -main")
; (flush) ;makes no difference if flush are commented out
(let [input (read-line)]
(println "ECHO:" input))
; (flush)
(println "Exiting -main"))
using lein run yields:
Entering -main
ECHO: nil
Exiting -main
In other words, there is no opportunity to enter text at the console for (read-line) to read.
How should I get Clojure to wait for characters and newline to be entered and return the corresponding string?
(I am using GNOME Terminal 2.32.1 on Linux Mint 11, Leiningen 1.6.1.1 on Java 1.6.0_26 Java HotSpot(TM) 64-Bit Server VM, Clojure version 1.2.1.)
Update: If I run lein repl, I can (println (read-line)), but not when I have a -main function and run using lein run.
Try "lein trampoline run". See http://groups.google.com/group/leiningen/browse_thread/thread/a07a7f10edb77c9b for more details also from https://github.com/technomancy/leiningen:
Q: I don't have access to stdin inside my project.
A: There's a problem in the library that Leiningen uses to spawn new processes that blocks access to console input. This means that functions like read-line will not work as expected in most contexts, though the repl task necessarily includes a workaround. You can also use the trampoline task to launch your project's JVM after Leiningen's has exited rather than launching it as a subprocess.
I have had similar problems and resorted to building a jar file and then running that.
lein uberjar
java -jar project-standalone.jar
It's a bit slower, though it got me unstuck. An answer that works from the repl would
be better
Wrap your read-line calls with the macro with-read-line-support which is now in ns swank.core [since swank-clojure 1.4+ I believe]:
(use 'swank.core)
(with-read-line-support
(println "a line from Emacs:" (read-line)))
Thanks to Tavis Judd for the fix.
You can use read and use a string as input.
Not sure about the lein aspects of the problem, but definitely in emacs it is impossible to make stdin work. However, if you want to get text from the user, you can easily do it using a JOptionPane like this code from my little tic-tac-toe program:
(defn get-input []
(let [input (JOptionPane/showInputDialog "Enter your next move (row/column)")]
(map #(Integer/valueOf %) (.split input "/"))))
How would you convert a clojure source file to YAML? I have used the clj-yaml library to do it in the interactive REPL, but I'd like to automate this, so I can pass in an input file and specify an output, ie:
clj2yaml input.clj > output.yml
As I understand it you need help to read and write the files?! See slurp and spit. For a real example of reading a YAML config file and parsing it with clj-yaml, see pswincom.gateway.config.
And here's an implementation of a simple clojure tool to do the convertion:
(ns sample
(:require [clj-yaml.core :as yaml]))
(->> (slurp (nth *command-line-args* 0))
read-string ; converts the file content to a clojure datastructure
yaml/generate-string
(spit (nth *command-line-args* 1)))
(On Windows) I can create a batch file called clj2yaml.bat to make it easy to use. It assumes the needed jar-files are located in the current directory. I'm just a novice when it comes to this kind of execution, so a better script is quite likely possible, but here it is:
java.exe -cp .\clojure-1.2.0.jar;.\clojure-contrib-1.2.0.jar;.\clj-yaml-0.3.0-20101010.033133-1.jar;.\snakeyaml-1.5.jar clojure.main sample.clj %*
I can now execute clj2yaml foo.clj foo.yaml to create the yaml file.
You already know how to code a clojure converter, you now just need to package it as a standalone application, and possibly create a sh script that just invokes your class.
As an alternative, here's a neat way to do it, if you're on a *nix environment:
#^:shebang '[
exec java -cp "$HOME/src/clj/clojure/clojure.jar" clojure.lang.Script "$0" -- "$#"
]
(your code here)