snap: child shells cannot find xterm-ghostty terminfo (terminals database is inaccessible)

[aaron-ang]

Issue Description

When Ghostty is installed via snap on Ubuntu 24.04, some programs running inside Ghostty (e.g. clear) fail with:
terminals database is inaccessible

The snap ships its own terminfo at $SNAP/share/terminfo/ but the launcher never exports TERMINFO_DIRS, so ncurses in child shells cannot find it. Ubuntu 24.04 ships ncurses 6.4 which predates the xterm-ghostty entry (added in ncurses 6.5-20241228), so the system terminfo also does not have it.

The files exist inside the snap, they are just invisible to child processes:

• /snap/ghostty/current/share/terminfo/x/xterm-ghostty
• /snap/ghostty/current/share/terminfo/g/ghostty

Fix proposed: export variable in snap/local/launcher

export TERMINFO_DIRS="${SNAP}/share/terminfo${TERMINFO_DIRS:+:$TERMINFO_DIRS}"

Expected Behavior

clear works out of the box after snap install.

Actual Behavior

clear fails: terminals database is inaccessible

Reproduction Steps

1. Install Ghostty via snap on Ubuntu 24.04
2. Open Ghostty
3. Run clear
4. Observe error

Ghostty Logs

No response

Ghostty Version

Ghostty 1.3.1

Version
  - version: 1.3.1
  - channel: stable
Build Config
  - Zig version   : 0.15.2
  - build mode    : .ReleaseFast
  - app runtime   : .gtk
  - font engine   : .fontconfig_freetype
  - renderer      : renderer.generic.Renderer(renderer.OpenGL)
  - libxev        : io_uring
  - kernel version: 6.17.0-1014-nvidia
  - desktop env   : other
  - GTK version   :
    build         : 4.14.5
    runtime       : 4.14.5
  - libadwaita    : enabled
    build         : 1.5.0
    runtime       : 1.5.0
  - libX11        : enabled
  - libwayland    : enabled

OS Version Information

Ubuntu 24.04.4 LTS (Noble Numbat)

(Linux only) Display Server

X11

(Linux only) Desktop Environment/Window Manager

GNOME 46.0

Minimal Ghostty Configuration

N/A. Default configuration.

Additional Relevant Configuration

No response

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.