I have never used SML on a Windows machine (have before on a unix machine w/ emacs).
for the life of me I cannot find the current directory when in the sml environment. If I attempt to: use "filename.sml" it raising an exception.. I cannot find out where to place my file..
btw file is written in notepad++ and merely named w/ a .sml extension.
The current working directory would be from where you start your SML interpreter. If you have a shortcut on your desktop, then I would gues you can set the CWD in the properties of the shortcut (I'm not a windows user), I would gues that it, by default, is the directory where you have SML/NJ installed.
If you start the sml interpreter from the commandline, then the CWD is the directory you were in, when you started the interpreter.
You can get the interpreter to output its CWD with the following command
OS.FileSys.getDir()
And you can also change the CWD to another working directory with OS.FileSys.chDir.
It is however easyer to just use absolute paths when trying to "load" sml files with use
Update.
Quite easy: You can do the following
- OS.FileSys.chDir("/tmp"); (* Go to the tmp directory *)
val it = () : unit
- OS.FileSys.getDir(); (* Verify that we did go to the tmp directory *)
val it = "/tmp" : string
- OS.FileSys.chDir("/home/jesper"); (* Go to my home directory *)
val it = () : unit
- OS.FileSys.getDir(); (* Verify where we did go. *)
val it = "/home/jesper" : string
On a windows file system you obviously have to escape the backspaces. The below code ought to work, but I can't test it as I don't have windows.
OS.FileSys.chDir("C:\\Users\\username\\Desktop");
In the comment you wrote, you had forgot to escape the two last backspaces.
Related
I am using vscode for my development with C++ and docker (Linux) and I have an issue with my compilation-to-code-editing work cycles.
Namely, I get errors with paths like this from the compiler:
In file included from **/rootsrc/myproj/test.cpp:33**:
<here is some error description>
And now if I hold Ctrl and left mouse-click on the file reference, vscode has no idea where that file is and gives me an error "No matching result".
Is there some way to set vscode up such that this plugin (or whatever it is) that is responsible for navigating from path links in the Terminal "knows" that it should first cut off the docker base dir and then prepend my host dir before resolving the path link?
Thanks in advance :)
I have built a C++ cross-platform application and am struggling with how to get it to work correctly on macOS.
So far, I'm able to run the application manually with the command open /Applications/myApp.app --args /path/to/myFile.ply.
I have associated all ply files with my application but when I double click on it in the finder, the file path is not in argv argument list.
How can I get the double-clicked file path in my application?
You'll need an event loop, normally done using the NSApplicationMain function. Then you need to receive an Apple Event telling what file(s) to open. It will be much easier if you are willing to use some Objective-C or Swift, rather than pure C++. In Objective-C, you'd make an object that conforms to the NSApplicationDelegate protocol and that implements a method application:openURLs: or application:openFile:.
#JWWalker has explained how to solve your problem by altering your code to cope with the macOS GUI environment. Here is a different approach which avoids messing with your C++. Pick the one that suits you needs best.
If your cross-platform application is designed to run from the shell prompt you might want to run it within the macOS Terminal app. You can do this using a small AppleScript application which accepts the file paths passed by the Finder and invokes the Terminal app to run your C++ code.
To do this open Script Editor, you will find it inside Utilities in Applications. Enter the following:
on open passedItems
set convertedPaths to ""
# convert passed macOS paths to posix paths
repeat with nextItem in passedItems
set posixPath to the POSIX path of nextItem # convert macOS alias to posix path
set convertedPaths to convertedPaths & " '" & posixPath & "'" # place in quotes to protect any spaces
end repeat
tell application "Terminal" # open (if required) and activate Terminal
activate
do script "echo " & convertedPaths # just run echo - use the path to your C++ binary instead
end tell
end open
If you can program in C++ you can probably figure that out, if not search for AppleScript and all will become clear.
Now save this as an application, for this demo it was saved in /tmp/bridge (aka /private/tmp/bridge on macOS) as "Bridge.app".
Now create some test files with a suitable extension, e..g something like:
$ cd /tmp/bridge
$ touch a.bridgeDemo 'b c.bridgeDemo'
From Terminal you can open /tmp/bridge in a Finder window using:
$ open /tmp/bridge
In the Finder select any of your test files, do a Get Info and set the file to open with Bridge and then hit Change All...
Now try it: select the test files in the Finder and open them. You should see Terminal open/activate and show you something like:
$ echo '/private/tmp/bridge/a.bridgeDemo' '/private/tmp/bridge/b c.bridgeDemo'
/private/tmp/bridge/a.bridgeDemo /private/tmp/bridge/b c.bridgeDemo
$
Now edit the AppleScript to run your compiled C++ instead of echo and save it in a suitable location. HTH
I am starting out with F# and trying to get it to work with Sublime Text 3 with a package, https://github.com/fsharp/sublime-fsharp-package. After installing the package using Package Control, I see F# appear as an available language to use in Sublime Text's bottom bar, and syntax highlighting appears to work more or less, from what I can tell, but the build system for F# fails to appear as it should.
So, trying to fix things, I run "build.sh install" and get an error, "Cannot open assembly '.paket/paket.bootstrapper.exe': No such file or directory." I am sort of stuck. Many thanks for any help.
From the comments you've made, you appear to be a little unfamiliar with the Unix underpinnings of OS X. I'll explain those first, then I'll suggest something for you to try that may fix your problem.
Technically, files or directories whose name starts with . are not "reserved for the system" as you put it; they're hidden. Now, it's true that Finder won't allow you to create files or directories whose name starts with ., because Apple didn't want to have to field all the tech-support calls from people who didn't know about the hidden-files feature: "I named my file ... more important stuff for work and now it's gone! Help!!!" But if you're in the Terminal app, then you can easily create files or directories with . as their first letter: mkdir .foo should work. You won't see it when you do ls, but ls -a (a for "all") will show you all files, including hidden files. And you can also do cd .foo and create files inside the hidden .foo directory -- and while the .foo folder won't show up in Finder, it will be perfectly accessible in the Terminal, and to any F# programs you might write.
So when you say that you cloned https://github.com/fsprojects/Paket but it failed to include the .github and .paket directories, I think you just don't know how to see them. You can't see them in the Finder (well, you can if you jump through a couple of hoops but I don't think it's worth the effort), but you can see them with ls -a. Just open your terminal, run cd /Users/Username/Paket, and then run ls -a and I think you'll see that the .paket and .github directories were indeed created by your git clone command.
So what you should probably try is this:
Go to https://github.com/fsprojects/Paket/releases/latest
Download the paket.bootstrapper.exe and paket.exe files. Put them in /Users/Username/Downloads (or wherever the default OS X Downloads directory is if it's different -- just as long as it's somewhere where you can find them easily).
Open the Terminal app.
Go to the directory where you've unpacked the Sublime Text 3 package. I.e., in the Terminal app, run cd /Users/Username/Library/Application\ Support/Sublime\ Text\ 3/Packages/sublime-fsharp-package-master.
Run ls -a and see if there's a .paket directory.
If it does not exist, run mkdir .paket.
Now do cd .paket so you're in the hidden .paket directory under sublime-fsharp-package-master.
Now do ls and see if there's a paket.bootstrapper.exe file.
If it doesn't exist, then copy in the .exe files you downloaded earlier:
cp /Users/Username/Downloads/paket.bootstrapper.exe .
cp /Users/Username/Downloads/paket.exe .
Important: Now do cd .. to go back up to the /Users/Username/Library/Application\ Support/Sublime\ Text\ 3/Packages/sublime-fsharp-package-master/ directory.
Now instead of running /Users/Username/Library/Application\ Support/Sublime\ Text\ 3/Packages/sublime-fsharp-package-master/build.sh install, try running it as ./build.sh install. (And also try ./build.sh Install, since I'm pretty sure the capital I is necessary).
(BTW, If you're not familiar with the syntax that I used in steps 9, 10 and 11, where I used a single . or two dots .. in commands, those are a long-standing Unix idiom: . means "the current directory", and .. means "the parent directory".)
I just looked at the build.sh script that you've been running, and it seems to assume that you've done a cd into the package's base directory (the sublime-fsharp-package-master directory) before running the script. So that could explain why it was failing: you were running it from a different directory, rather than doing a cd first. Hence why I marked step 10 as important: I think that was the root cause of the problem.
This is driving me crazy, I must admit. After finally being able to successfully compile two functions I need to process voice files, from C/C++ code that I downloaded from a trustworthy online repository (code that had been thoroughly tested in Linux), I am now struggling to launch those files from Matlab...
When I type the following command in cmd (dos)
Analysis b2.wav config_default
it works, no problem (see here Works).
Then, I build the exact same command into a string and feed it to the "system" Matlab function. Then the code crashes... (see here Fails) I've tried with full paths (c:\b2.wav, etc) but still does not work...
Any ideas as to why this might be happening?
Your image shows that the program Analysis stopped unexpectedly.
It might be a lot of reasons why, so let's go step by step:
1) Try executing Analysis from Terminal and passing wrong parameters (a file that doesn't exist, only one param (missing the config_defalut), no parameters at all, three parameters, etc...)
Can you make the program crash from terminal by passing wrong params?
2) Try creating the command first, checking that it's correct (\b is actually \b instead of a string modifier)
command_to_be_run = 'C:\Analysis C:\b2.wav C:\config_default'
disp(command_to_be_run) % is it showing exacly what you want?
system(command_to_be_run); % if so, run it.
3) Try creating a dummy executable dummy.exe in C that accepts two parameters and prints the received parameters (keep it super simple, just printing). Call it from Terminal. Does it work? Call it from Matlba. Does it Work?
With this 3 tests you can considerably narrow down where your error comes from.
By the way, is "config_default" a file or just a string that tells analysis how to behave? In some examples you treat it as a file, in others as a parameter without path.
Based on what's been tried so far and the outputs, here's my theory:
Premise: Analysis.exe came from code that's well tested in Linux. It works in Windows command line when run from the same directory where both it and the target file reside. But it stops working from Matlab console.
Assertion 1: Matlab console does not operate within the context of the directory where the binary is but rather within the Matlab directory. As such, Analysis.exe will try to find the target from the Matlab directory.
Validation for Assertion 1: Try putting the binary and the target wav in the Matlab directory. Then run system with the binary and target specified just by name (no path).
Assertion 2: If the file's full path is specified to address this issue, it still doesn't work. This may be because the code assumed a Linux file system where the delimiter is "/" rather than "\".
Validation for Assertion 2: Run with paths specified from the command line while in a diferent directory to see if it fails or not.
Possible Solution 1: Add the directory where both Analysis.exe and the target are into the Matlab path: (1) On the Home tab, in the Environment section, click Set Path. Add the path there. (2) addpath (folderName1,...,folderNameN) adds the specified folders to the top of the search path for the current MATLAB session. -> Then run the system command without the full paths.
Possible Solution 2: Add the directory where both Analysis.exe and the target are into the Windows environment path. Then run the system command without the full paths.
EDIT: Possible hackish solution - Create a batch file where: (1) you would cd to the directory where Analysis.exe and the target wav are; and (2) do a Matlab system call to the batch file.
EDIT 2: Possible experiment to validate assertion 2.
I am writing a simple C++ helpertool for a popular game (League of Legends), targeted at windows users.
I wish to allow the user to auto restart games which crash. This can be done by starting 'leagueoflegends.exe'. I want to autodetect the location of the executable and this is where I have issues.
The exe is located at:
*GAME_FOLDER*\RADS\solutions\lol_game_client_sln\releases\x.x.x.xx\leagueoflegends.exe
I use a registry entry to get the game folder, ie: C:\leagueoflegends\
However there is a folder that changed with every update in the form of x.x.x.xx where the x are digits (numbers) reflecting the versions. There is always 1 folder in the releases folder.
I figured I need to use REGEXP but I didn't have much luck.
This is the regexp I made:
^[0-9]\.[0-9]\.[0-9]\.[0-9][0-9]$
This is what I used to get the name of the dir using cmd
dir /B | findstr /R " ^[0-9]\.[0-9]\.[0-9]\.[0-9][0-9]$"
However I cant seem to be able to run the executable no matter what I do. Its not like linux where I can manipulate filters and pipes. Any help with a one liner to run the exe or methods of obtaining the folder name (without using a system call?) would be appreciated. Once I can get the folder name in a variable then it becomes easy.
Thanks in advance!