alexion
627fc9a32b
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105 lines
3.9 KiB
Nix
105 lines
3.9 KiB
Nix
# The first automated proof of the home-manager module's composition (ADR 0021).
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#
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# It evaluates the *real* module through home-manager's standalone configuration
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# entry point and builds the resulting home files derivation — the file-linkage
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# layer that actually decides whether two declarations collide — under several
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# operator configurations, then asserts on the tree each one produces. It never
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# reads module internals: not option values, not store paths, not the shape of
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# the file mechanism, only which files a generation contains. Building the home
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# files derivation needs neither the Claude Code binary nor a running agent.
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#
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# The configurations cover the remaining composition risks: the explicit
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# sibling-enable gate that keeps the hook off a host without Claude Code, the
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# hook merging into an operator's own SessionStart list rather than replacing it,
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# and the Agent Skill staying out of global harness directories because project
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# dev shells deliver it through the agent-agnostic skills helper.
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{
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pkgs,
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home-manager,
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module,
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package,
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}:
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let
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# A distinctive command so the merged-hook assertion can tell the operator's
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# own SessionStart hook apart from gitea-axi's in the generated settings.json.
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operatorHook = {
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matcher = "";
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hooks = [
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{
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type = "command";
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command = "operator-own-session-hook";
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}
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];
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};
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# Evaluate the real module through home-manager's standalone entry point and
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# return the home files derivation — the tree home-manager would link into
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# $HOME. `programs.gitea-axi.enable` is on in every configuration; the package
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# is the flake's own build, so the check reuses the store path the package
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# check already produces rather than building a second time.
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homeFiles =
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operatorConfig:
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(home-manager.lib.homeManagerConfiguration {
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inherit pkgs;
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modules = [
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module
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{
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home.username = "operator";
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home.homeDirectory = "/home/operator";
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home.stateVersion = "24.11";
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programs.gitea-axi.enable = true;
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programs.gitea-axi.package = package;
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}
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operatorConfig
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];
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}).config.home-files;
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# Claude Code disabled: the sibling-enable gate in the Claude Code module must
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# leave no settings file or Skill entry in the generation.
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claudeCodeOff = homeFiles {
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programs.claude-code.enable = false;
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};
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# Claude Code enabled: the module contributes only the SessionStart hook, not
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# a global Skill entry.
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claudeCodeOn = homeFiles {
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programs.claude-code.enable = true;
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};
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# An operator with their own SessionStart hook: the module's hook must merge
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# into that list rather than replace it.
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mergedHook = homeFiles {
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programs.claude-code.enable = true;
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programs.claude-code.settings.hooks.SessionStart = [ operatorHook ];
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};
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in
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pkgs.runCommandLocal "gitea-axi-home-manager-module-check"
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{
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# Forcing each derivation as a build input is what actually builds the home
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# files tree under every configuration.
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inherit
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claudeCodeOff
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claudeCodeOn
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mergedHook
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;
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}
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''
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echo "Claude Code disabled: no hook settings or global Skill entry is written"
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test ! -e "$claudeCodeOff/.claude/settings.json"
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test ! -e "$claudeCodeOff/.claude/skills/gitea-axi"
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echo "Claude Code enabled: hook lands, but the Skill is not globally installed"
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grep -q '"gitea-axi"' "$claudeCodeOn/.claude/settings.json"
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test ! -e "$claudeCodeOn/.claude/skills/gitea-axi"
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echo "operator's own SessionStart hook: the module's hook merges in"
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# Match the commands as quoted JSON string values, not by their position or
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# the emitter's colon spacing: both must be present for a merge (rather than
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# a replacement) of the two SessionStart hooks.
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grep -q '"operator-own-session-hook"' "$mergedHook/.claude/settings.json"
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grep -q '"gitea-axi"' "$mergedHook/.claude/settings.json"
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touch "$out"
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''
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