vicrodh
af1ccce398
Keeps only the most-recently-modified incremental-compilation dir per crate under crates/target and prunes the rest (slint-run.sh's per-RAM-tier RUSTFLAGS spawn a new hash dir each time; Cargo never GCs them). Release builds do not use incremental, so unaffected. cc
64 lines
2.2 KiB
Bash
Executable File
64 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# QBZ — prune stale incremental-compilation caches under crates/target.
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#
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# WHY: `cargo check` writes an incremental cache dir per crate, keyed by a hash
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# of the build config (RUSTFLAGS / codegen-units / opt-level). Because
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# slint-run.sh flips those knobs per RAM tier, EVERY distinct config spawns a
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# NEW `<crate>-<hash>/` dir and Cargo NEVER deletes the old ones. Over months
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# they pile up (1000+ dirs, hundreds of GB of pure garbage).
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#
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# This keeps only the MOST-RECENTLY-MODIFIED incremental dir per crate (that's
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# the one that actually speeds up your next check) and deletes the rest.
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#
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# NOTE: release builds (slint-run.sh / slint-dev.sh) do NOT use incremental at
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# all, so this never slows them down. It only affects `cargo check` speed, and
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# only prunes stale snapshots you're not using.
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#
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# Usage:
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# ./scripts/prune-incremental.sh # prune, keep newest per crate
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# DRY=1 ./scripts/prune-incremental.sh # show what WOULD be deleted
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# KEEP=2 ./scripts/prune-incremental.sh # keep the 2 newest per crate
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set -euo pipefail
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cd "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/.."
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TARGET="crates/target"
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KEEP="${KEEP:-1}"
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DRY="${DRY:-0}"
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freed=0
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for incdir in "$TARGET"/*/incremental; do
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[[ -d "$incdir" ]] || continue
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declare -A seen=() # reset per profile (debug/, release/, etc.)
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# Feed "<mtime>\t<crate>\t<path>" sorted by crate asc, then mtime desc, so the
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# newest dir of each crate arrives first.
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while IFS=$'\t' read -r _mtime crate path; do
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[[ -n "$path" ]] || continue
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seen["$crate"]=$(( ${seen["$crate"]:-0} + 1 ))
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(( seen["$crate"] <= KEEP )) && continue # keep the newest KEEP per crate
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sz=$(du -sm "$path" 2>/dev/null | cut -f1)
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freed=$(( freed + ${sz:-0} ))
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if [[ "$DRY" == 1 ]]; then
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echo "would delete: $path (${sz}M)"
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else
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rm -rf "$path"
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echo "deleted: $path (${sz}M)"
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fi
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done < <(
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for d in "$incdir"/*/; do
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[[ -d "$d" ]] || continue
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name=$(basename "$d")
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printf '%s\t%s\t%s\n' "$(stat -c %Y "$d")" "${name%-*}" "${d%/}"
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done | sort -t$'\t' -k2,2 -k1,1rn
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)
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unset seen
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done
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if [[ "$DRY" == 1 ]]; then
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echo "--- DRY run: would free ~${freed} MB (KEEP=$KEEP) ---"
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else
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echo "--- freed ~${freed} MB (KEEP=$KEEP) ---"
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fi
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