feat: custom [indices] in mcpp.toml with project-level isolation#39
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…evel isolation Implement the first phase of custom package index support: - Fill in IndexSpec struct in src/pm/index_spec.cppm (name, url, rev, tag, branch, path) with is_local/is_pinned/is_builtin helpers - Parse [indices] section in mcpp.toml (short string form, inline table with url/rev/tag/branch/path, and local path form) - Parse [indices] section in config.toml (global config) - Add indices field to Manifest and GlobalConfig structs - Add projectDir field to xlings::Env; build_command_prefix conditionally sets XLINGS_PROJECT_DIR for project-level isolation - Add ensure_project_index_dir() to create .mcpp/.xlings.json with custom index entries when non-builtin indices are configured - Add Fetcher::read_xpkg_lua_from_path() for local path index support - Update cmd_index_list to display project-level indices from mcpp.toml - Update prepare_build to set up .mcpp/ directory for custom indices - Add E2E test (42_custom_local_index.sh) verifying parsing + display
This was referenced May 15, 2026
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Summary
[indices]section inmcpp.tomlandconfig.tomlfor configuring custom package index repositoriesacme = "git@...") , long form (acme = { url = "...", tag = "v2.0" }) , and local path (local = { path = "/..." })XLINGS_PROJECT_DIR: custom indices get their own.mcpp/directory, while built-in indices (mcpplibs) stay global.mcpp/.xlings.jsonChanges
src/pm/index_spec.cppmIndexSpecstruct (name, url, rev, tag, branch, path) withis_local(),is_pinned(),is_builtin()helperssrc/manifest.cppmManifest::indicesfield +[indices]TOML parsing (short/long/path forms)src/config.cppmGlobalConfig::indices+[indices]parsing in config.toml +ensure_project_index_dir()+make_project_xlings_env()src/xlings.cppmEnv::projectDirfield +build_command_prefix()dual mode (global vs project-level)src/pm/package_fetcher.cppmread_xpkg_lua_from_path()for local path index direct readingsrc/cli.cppmcmd_index_listshows project indices +prepare_buildcallsensure_project_index_dirtests/e2e/42_custom_local_index.shmcpp index listverificationDesign
[indices]key = index name (maps to xlings repo{name, url}), not namespacenamespacefield; falls back to index name if absent~/.mcpp/registry/), custom indices use project-level.mcpp/viaXLINGS_PROJECT_DIR(verified: additive mode, global repos remain visible).agents/docs/2026-05-16-indices-enhancement-design.mdfor full designTest plan
mcpp buildcompiles successfully with all changes42_custom_local_index.shpasses (local path index parsing + index list)01_help_and_version.sh,11_index_list.shpass (no regression)mcpp index listshows project indices when[indices]is configured