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Bash Strict Mode

redsymbol.net

I've known about the flags to make Bash behavior more strict or predictable, but this one adds an extra dimension for making iteration over strings more predictable as well. In a nutshell, strict mode is:

set -euo pipefail
IFS=$'\n\t'

Read the post for an excellent write-up of why each of these is important, and what each accomplishes.

bash til

/postroll

Prevent the Docker container from taking 10 seconds to stop

akrabat.com

Rob Allen details how the exec form of a Docker CMD is the better form to use. The reason the string form invokes bash first, and thus bash gets PID 1, which is what Docker will terminate when the container is terminated. The problem is that bash doesn't then send a termination signal to the actual process invoked, forcing the Docker host to wait 10 seconds before force killing all processes in the container.

bash docker til

From the blog

Posted 2023-12-13
Advent 2023: Makefile: guard targets

A couple days ago, I wrote about Makefile. Today, I'm going to show a quick tip for writing "guard" targets.

advent2023 bash make makefile

From the blog

Posted 2023-12-11
Advent 2023: Makefile

I like to automate common workflows when I can, particularly for web projects. As an example, I may have different Docker Compose setups for development versus production, and having to remember to add the -f {compose file name} argument can be tedious and error prone.

Being a long-time Linux user, I've used make a lot, and am fairly comfortable with Makefile, so I often turn to it for these tasks.

advent2023 bash make makefile

From the blog

Posted 2023-12-06
Advent 2023: MOTD on Ubuntu

I never intended for this Advent 2023 series to be a "Matthew's Bash Tips" series, but evidently, that's where things are going.

Today, I detail how to get the "message of the day" on Ubuntu

advent2023 bash ubuntu

From the blog

Posted 2023-12-05
Advent 2023: Shellcheck

As you may have noted from previous posts in this Advent 2023 series, I find myself using Bash more and more often. This has certainly been a surprise for a career PHP developer, but it is what it is.

With PHP, there are a wealth of QA tools, from unit testing, to enforcing coding standards, to static analysis. What about with Bash? Well, the tools exist, and there's one I literally cannot write Bash without: Shellcheck.

advent2023 bash shellcheck

From the blog

Posted 2023-12-04
Advent 2023: A deploy script

For the fourth day of 2023 advent blogging, I'm sharing a tool I've used to simplify deployment.

advent2023 bash deployment devops

From the blog

Posted 2023-12-03
Advent 2023: Bashly

For the third day of my 2023 advent blogging, I'm covering a tool I've really leaned hard on the last few years: Bashly.

advent2023 bash bashly

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