Module shell_init 

Shell-init profile reader, aggregator, and rotation.

Profile files are written by the timing wrapper that crate::shell::generate_init_script embeds in dodot-init.sh. Each shell startup emits one TSV under <data_dir>/probes/shell-init/profile-<unix_ts>-<pid>-<rand>.tsv with the shape:

# dodot shell-init profile v1
# shell\tbash 5.3.9(1)-release
# start_t\t1714000000.123456
# init_script\t/home/alice/.local/share/dodot/shell/dodot-init.sh
# columns\tphase\tpack\thandler\ttarget\tstart_t\tend_t\texit_status
path\tvim\tpath\t/home/alice/dotfiles/vim/bin\t1714000000.123500\t1714000000.123502\t0
source\tvim\tshell\t/home/alice/dotfiles/vim/aliases.sh\t1714000000.123600\t1714000000.124900\t0
# end_t\t1714000000.125100

Both the reader and the rotator are tolerant of malformed input — a partial write from a crashed shell should leave the next dodot probe shell-init working, just with a short report.

Structs

AggregatedTarget

Per-target stats across N runs.

AggregatedView

Aggregate output, one row per (pack, handler, target) keyed by all the profiles passed in.

GroupedProfile

Aggregate one profile by (pack, handler) for the rendered table.

HistoryEntry

One row in the history view: a single run’s headline metrics.

Profile

A whole profile file, post-parse.

ProfileEntry

One parsed entry row from a profile TSV.

ProfileGroup

Functions

aggregate_profiles

Roll up a slice of profiles into per-target percentile stats.

group_profile

Roll up a profile into per-(pack, handler) groups for display.

parse_profile

Parse the textual content of a profile file. Tolerates missing preamble lines, unknown comments, and malformed rows (skipped).

read_latest_profile

Read the most recently written profile under <data_dir>/probes/shell-init/, or None if the directory is empty / missing.

read_recent_profiles

Read up to limit most recent profiles, newest first.

rotate_profiles

Prune <data_dir>/probes/shell-init/ to the newest keep files (by filename). Returns the number of files removed. keep == 0 is treated as “no pruning” — we don’t want a stray miscalibrated config to wipe the whole profile history.

summarize_history

Build a history view from a slice of profiles (newest-first input, preserved order in the output — caller decides cadence).