I have a very unnecessary scripting question: how can I make the command fortune run along with any other command? So, for example, instead of running
something
I want to ALWAYS force run something similar, but not exactly
fortune && something
wherein the fortune command finishes before the other command begins.
Is there a way to do this in Mac OS X Yosemite?
I don't know exactly what you are trying to achieve.
But you can try below:
eg. you want to fire 'hostname' and 'pwd' whenever 'hostname' command is fired.
Add below line in your bash profile.
alias hostname="hostname;pwd;"
you will get output like below:
[user#host ~] hostname
host1.example.com
/data/data2/new
Related
I have a program written in C that fails. When I run it in zsh, the program fails, but it's error output is not displayed in command line (note that the second ➜ was red, indicating a failed execution):
hpsc-hw2-USER on master
➜ ./sort -a 405500
hpsc-hw2-USER on master
➜
However, when I run it in bash, the error shows up:
[USER#COMPUTER hpsc-hw2-USER]$ ./sort -a 405500
Segmentation fault (core dumped)
Any idea why? I'm running oh-my-zsh with the spaceship theme if that helps.
but it's error output is not displayed in command line
That's not something that your program writes to the screen. It's the shell that's writing it. So the shell is not 'hiding' it.
I'm not using zsh myself, but since a red arrow indicates that the program was abnormally terminated, I guess you can look at the code for the red arrow and create a custom message. Here is a question about the error codes that might help you: What error code does a process that segfaults return?
I remember that I once made a custom bash prompt that showed the last exit code. Maybe I used this, but I'm not sure: Bash Prompt with Last Exit Code
Here is the documentation for how to customize the prompt for spaceship theme: https://denysdovhan.com/spaceship-prompt/docs/Options.html#exit-code-exit_code
I assume that you need to add exit_code to the SPACESHIP_PROMPT_ORDER section in your .zshrc file.
Any idea why?
You probably have to ask the developers. An equally valid question is: "Why does bash print 'segmentation fault'?" It's just a design choice. Bash does not print the memory address where the segfault occurred. Why is that?
Seems like the developers of oh-my-zsh thought it was enough with a red arrow.
Any ideas how to make zsh output the error message?
The result of the last command is stored in the shell variable ?, so you can print it with something like print $? or echo $?. Like most shells, zsh is incredibly configurable, so you can write a script that e.g. includes the result of the last command in your prompt. Here's a blog post in which the author configures zsh to display non-zero results in the right prompt: Show Exit Code of Last Command in Zsh.
Or why it doesn't do it to begin with?
Shell commands don't normally crash, and if they encounter errors they typically provide more useful output than just the return code on their own. The return code is most useful for scripts, so that you can write a script that handle error conditions.
Is there a way to execute commands line-by-line written in NPP editor in a console.
I have already looked at the following plugins, but they seem to execute a line or chunk of code as a standalone script (i.e. not interactive):
NPPExec;
NPPConsole;
This question is similar to this one:
Run selected line in notepad++ console
but in their case the code is being saved, executed, and stopped. But I would like an interactive console, i.e. it would bring up an instance of shell (or any other console), and I can send line-by-line code from NPP editor.
It sounds like you are looking for behaviour similar to IPython and the Jupyter Notebook or maybe just a regular debugger. I don't know of any plugin that can do that in Notepad++.
If interactive behaviour after initial execution will do (e.g. for inspection of variables), you can achieve that using the interactive flag -i in NppExec like this:
cd $(CURRENT_DIRECTORY)
python -u -i $(FILE_NAME)
Whenever I try to run any Arduino CLI commands, I am always getting a popup saying "MainClassNameRequired". What is going on and what do I need to do to be able to run arduino CLI commands?
I found the following JA.SO question and answer: https://ja.stackoverflow.com/q/20667.
My Japanese is terrible, and Google Translate didn't help too much, but the paths in the answer were correct and I was able to get the gist & get it working.
It turns out that, for whatever reason, the Arduino symbolic link created in /usr/local/bin, even though it is linked to the correct executable, doesn't actually pass the parameters through.
The Japanese answer suggested two solutions, both of which work. Firstly, remove the existing symlink from /usr/local/bin, then you can either:
Create a shell script wrapper to call the Arduino executable that will pass parameters through and then link create a symlink to that (or just make it executable and place it in /usr/local/bin):
#!/bin/bash
exec /Applications/Arduino.app/Contents/MacOS/Arduino "$#"
ln -s /usr/local/bin/arduino arduino.sh
Create an alias
alias arduino='/Applications/Arduino.app/Contents/MacOS/Arduino
Now when you execute arduino from your command prompt, your parameters are correctly passed to the program.
Is there any way for changing the interpreter in the middle of a bash script
For instance start with:
#!/bin/bash
Later change to:
#!$drush_location
The reason is because I want to use bash to resolve the location of drush using bash and then pass that var in as an interpreter
You will need to write two scripts and use the first (bash) one to launch the second (drush).
There are other ways to accomplish this, but they are all basically fancy ways of doing the above. For example you could use a here-doc to cram a script contained as a string in your first script into stdin on drush and have it execute that, or even write a temporary file and execute that as a script, but you have to run two processes somehow, you can't change the interpreter on the fly.
Really the thing to do would be to fix your environment so that it can find drush. Then you can use:
#!/usr/bin/env drush
As the hashbang for your drush script. If your system evn can't find it, then fix your search paths until it can!
The simplified version of my question is how can I achieve a command such as the following.
gvim --remote-tab-silent -c mak
When I run this command I am hoping for a new tab to be opened, and to have the make command run. What actually happens however is there are two new tabs "-c" and "mak"
Is there a way to do this? My end goal is to be able to within vim run a command such as this to give me asynchonous make output.
!gvim --remote-tab-silent -c mak
Thanks in advance.
--EDIT--
I found the documentation for --remote, which explains how to do a remote command with opening a file. The syntax applies to remote-tab apparently.
To do what I want I am now using
gvim --remote-tab-silent +mak MakeOutput
Similarly inside vim I can use
!gvim --remote-tab-silent +mak
MakeOutput
It automatically opens the first error in a file for me, which is convenient I would think :)
It seems like what you're asking is how to execute commands asynchronously with updates when they complete.
Have a look at my AsyncCommand plugin. It's just wraps the vim syntax required to execute something and load it with --remote. I've uploaded AsyncCommand 2.0 that includes an AsyncMake command.
Add the script to your .vim/plugin and you can build with :AsyncMake or :AsyncMake target. Errors will be opened in your quickfix once the make completes.