fluxer-update

Basic bash script to download the Fluxer's Linux x64 AppImages (stable+canary) and add to PATH. (makes many assumptions) Downloads AppImage with name from server, then softlinks to a configured user path. Does not delete old AppImage's by default.

Potentially build this out for fun. Give more options. Add error checking? It's more for my learning, and some slight convenience for my personal use-case until a more consistently updated package is established.

Check Fluxer's links:
Fluxer Homepage
Fluxer GitHub (Fluxer Roadmap (2026))

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Setup

Install

Download or clone to any directory, ideally an empty one of its own. Download or link main script to path to call in terminal.

Or, single-use to run with the defaults until flags are added.

curl -sL https://git.mana.pink/rubeae/fluxer-update/raw/branch/main/fluxer-update | bash

Config

Set user variables at top of script.

Variable	Purpose	Default
STABLEURL	URL for Fluxer Stable AppImage.	https://api.fluxer.app/dl/desktop/stable/linux/x64/latest/appimage
CANARYURL	URL for Fluxer Canary AppImage.	https://api.canary.fluxer.app/dl/desktop/canary/linux/x64/latest/appimage
DOWNLOADDIR	Directory to download AppImages to. Downloads are expected to remain here.	$HOME/Applications
INSTALLDIR	Directory to link to the AppImages from. Expects it to be in $PATH.	$HOME/.local/bin
PERMS	Permissions. 0500 at minimum.	0755
STABLE_NAME	Name to use for the symlink for Fluxer Stable.	fluxer-stable
CANARY_NAME	Name to use for the symlink for Fluxer Canary.	fluxer-canary
PRIMARY_BRANCH	Which branch of Fluxer to prefer when launching.	canary

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Behaviour

This script was written with the intent of downloading and symlinking the Fluxer AppImages from the main page. This behavior ideally would be changed to favor github in some future iteration if usefulness remains.

Bash script will:

• Check $PATH for $INSTALLDIR, then attempt to add it to .bashrc if missing.
  • Error from adding to $PATH when not using bash may be bypassed if directory is in '$PATH' already.
• Use curl to query for a filename from the download URL.
• Use curl to download file, then chmod to set as executable using $PERMS.
• Use ln -sfr to create/update a link to $DOWNLOADDIR from $INSTALLDIR.
• pkill -f $STABLE_NAME and $CANARY_NAME processes, then relaunch via symlink if any were closed.

Known Bugs

• Stable crashes and hangs instead of properly handling a SIGKILL as of fluxer-stable-0.0.8-x86_64.AppImage, so we prefer canary branch in the user configuration for now.

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TODO

Non-extensive shopping list. We're frugal here though.

• Download and prepare AppImage with ln without killing current running process.
  • Add flag to auto-restart process. (potentially replace pkill with pgrep to set flag first, then pkill on flag)
• Opt-in flags for link creation or using link to launch process when done.
• Convert URL-encoding in filename string from curl.
• Better universal support.
• Add better error handling for adding to $PATH.
• Better error understanding and handling for for curl downloads.
• We like .env files in this house.

Security concern:
Checking file that already exists in directory is simply a filename check. Potential to link and enable execution on such a file if it already exists there with the same name.

Friends, feel free to add ideas to this, make pull requests, or send me code snippets to learn from. Not expecting this to actually update otherwise.