gum spin rendered static on the real VM during long transactions.
ui_quiet_run now draws its own line: braille spinner frame + the
package dnf is currently working on (from the transaction log), at
150ms ticks. Works without gum (pure bash), gated on interactive
terminal, not on gum.
set -e + pipefail bug found via pty trace: the first tick races the
child's first log line, grep exits 1 (no match) and pipefail turns the
whole substitution nonzero, killing the script silently at the first
frame. || true on the substitution pipeline fixes it.
Pathfinder
a54f14018e