rootiest
3fd9476fbc
Enforces the rails the vault depends on: only directories are linked (agent editing tools refuse to write through a symlinked file), a missing target is refused rather than turned into a dangling link, and adopting a populated live directory copies without clobbering. Also fixes slug sanitization in _agents_repo_slug to apply the same [^a-z0-9._-] → - mapping to the fallback (no-remote) branch, ensuring local project slugs are filesystem-safe and won't leak special chars like spaces or exclamation marks.
72 lines
2.6 KiB
Fish
72 lines
2.6 KiB
Fish
# Copyright (C) 2026 Rootiest
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# SYNOPSIS
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# _agents_repo_ensure_symlink <link> <target>
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#
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# DESCRIPTION
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# Idempotently makes <link> a symlink pointing at the directory <target>.
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#
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# Only directories are ever linked. The agent file-editing tools resolve a
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# symlinked directory transparently but refuse to write through a
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# symlinked file, so linking a file would silently break every later edit;
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# a non-directory target is refused outright.
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#
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# A missing target is refused rather than linked, because a dangling
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# memory/ symlink makes agent memory writes fail -- strictly worse than
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# having no backup at all.
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#
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# When <link> is an existing real directory, its contents are copied into
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# <target> without clobbering (cp -n) before the directory is replaced by
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# the link, so adopting a populated live directory never overwrites the
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# copy already in the vault.
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#
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# ARGUMENTS
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# link Path that should become the symlink
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# target Existing directory the link should point at
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#
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# EXIT STATUS
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# 0 Link is correct (created, repinned, or already right)
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# 1 Refused (non-directory target, missing target, non-directory link) or
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# a copy, remove, or link operation failed
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#
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# RETURNS
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# A single "→ ..." progress line on stdout when something changed;
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# nothing at all when the link was already correct.
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#
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# EXAMPLE
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# _agents_repo_ensure_symlink ~/.claude/projects/-home-u-proj/memory \
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# ~/.local/share/agent-vault/projects/host-user-proj/claude/memory
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function _agents_repo_ensure_symlink --argument-names link target
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test -n "$link" -a -n "$target"; or return 1
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if test -e "$target"; and not test -d "$target"
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echo "_agents_repo_ensure_symlink: refusing non-directory target: $target" >&2
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return 1
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end
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if not test -d "$target"
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echo "_agents_repo_ensure_symlink: target does not exist: $target" >&2
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return 1
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end
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if test -L "$link"
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set -l cur (path resolve "$link")
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set -l want (path resolve "$target")
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test "$cur" = "$want"; and return 0
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rm -f "$link"; or return 1
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else if test -d "$link"
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set -l contents (command ls -A "$link" 2>/dev/null)
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if test (count $contents) -gt 0
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command cp -rn "$link/." "$target/"; or return 1
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end
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rm -rf "$link"; or return 1
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else if test -e "$link"
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echo "_agents_repo_ensure_symlink: refusing to replace non-directory: $link" >&2
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return 1
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end
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mkdir -p (path dirname "$link"); or return 1
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ln -s "$target" "$link"; or return 1
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echo "→ Linked "(path basename "$link")" → $target"
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end
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