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I have written a shell script (bash) which runs some commands. It has an option to not to run the commands but to echo them to the screen. By default, the output of these commands is redirected to /dev/null but there is another option to show the output on the screen.

I use a function to check for the value of these variables and run the commands or simulate them:

I'm trying to make a small tweak to this Sublime Text 3 plugin making this is my first foray into Python.

The plugin provides a list of Markdown files when the command [[ is entered in the keyboard. The thing is that other files show up on the list that I do not want to appear!

From what I've gathered, the bulk of the command demands on os.listdir(directory). I'm aware that trying to list only specific extensions with os.listdir has been inquired of previously such as here and here, but I just don't understand how to go about implementing those answers into the code that I have. Like others have sought, I'm trying to figure out how to show only .md files using os.listdir, but the exception is that I'm looking to do so in the scope of this plugin.

The code for the plugin in it's entirety is available here.

Below is an excerpt that includes what I would imagine is the more relevant details of my dilemma.

I'm reading/editing a bash git integration script

This snippet is supposed to print ${SYMBOL_GIT_PUSH} or ${SYMBOL_GIT_PULL} alongside how many commits i am behind and/or ahead by.

I am writing a shell script which performs a task periodically and on receiving a USR1 signal from another process.

The structure of the script is similar to this answer:

I have read about the downfalls of parsing ls, printf, echo and others due to the lack of a delimiting null character.

I asked a question about using functions to get around this issue, and the answer seemed to correctly state that the same issue would occur since I was using basic echo.

However, I recently read that it is possible to output a null delimited character using printf (and I would assume echo -e).

Of course, a for loop offers the ultimate flexibility, but printf and its implicit looping over arguments can cover many of the simpler cases. It can even produce NUL-delimited streams, perfect for later retrieval:

I have a private wiki installation:

It seems that the set -e option in Bash gets reset inside of functions, when those functions are invoked via a $(...) expansion.

This surprises me, and I'm not sure if it is a bug or not. I have not been able to find a description of this behavior in the (usually quite thorough) Bash manpage.

Note: here are some other similar SO posts:

• Bash functions ignore set -e
• Using set -e / set +e in bash with functions

But neither of them deals with $(...), which is not really discussed in the manpage either.

I also cannot find reference to this issue in the excellent Bash FAQ 105.

Here is a small program to demonstrate the issue:

I want to run a node.js app in a docker container using docker-compose. The app is TiddlyWiki, there are other containers and the whole thing runs in a vagrant VM and is set up with ansible, but I don't think any of that matters for this problem.

This is my docker-compose config:

I have a very simple script that I use to wait for a process to complete. The script is used preceding calls to tasks, commands that depend on the process completion. If the process is ready the desired command will run. The format is: