Initial commit: mcpp-index seed with mcpplibs.templates v0.0.1

Author: Sunrisepeak

.github/workflows/validate.yml

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+name: validate
+
+on:
+  pull_request:
+    paths: ["pkgs/**/*.lua"]
+  push:
+    branches: [main]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Lint package descriptors
+        run: |
+          fail=0
+          for f in pkgs/*/*.lua; do
+            if grep -q "^function install" "$f"; then
+              echo "::error file=$f::install hook is forbidden"
+              fail=1
+            fi
+            if ! grep -q "mcpp = {" "$f"; then
+              echo "::error file=$f::missing mcpp = {} segment"
+              fail=1
+            fi
+            if ! grep -q 'schema *= *"0\.1"' "$f"; then
+              echo "::error file=$f::missing schema = \"0.1\""
+              fail=1
+            fi
+          done
+          [ $fail -eq 0 ] && echo "All package files valid."
+          exit $fail

LICENSE

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+This repository's package descriptors (.lua files) are released under
+Creative Commons Zero v1.0 Universal (CC0).
+
+The mcpp tool that consumes them is licensed under Apache-2.0; each indexed
+package has its own license declared in its own xpkg descriptor.

README.md

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+# mcpp-index
+
+> Package index registry for the [`mcpp`](https://github.com/mcpp-community/mcpp) build tool.
+
+This repository indexes modular C++23 packages that follow the
+[xpkg v1 spec](https://github.com/d2learn/xim-pkgindex/blob/main/docs/V1/xpackage-spec.md)
+plus the [mcpp extension segment](https://github.com/mcpp-community/mcpp/blob/dev/docs/04-schema-xpkg-extension.md).
+
+## How is this different from xim-pkgindex / mcpplibs-index?
+
+| Repo | Format | Build tool | Status |
+|------|--------|------------|--------|
+| [`d2learn/xim-pkgindex`](https://github.com/d2learn/xim-pkgindex) | xpkg v1 (Lua) | xlings + various | Official xlings index |
+| [`mcpplibs/mcpplibs-index`](https://github.com/mcpplibs/mcpplibs-index) | xmake `package(...)` | xmake | mcpplibs xmake-style index |
+| **`mcpp-community/mcpp-index`** (this) | xpkg v1 + mcpp ext | mcpp | Modular-only, mcpp-driven |
+
+## Layout
+
+```
+pkgs/<letter>/<package>.lua    Each indexed package
+docs/                           Contributor docs
+.github/workflows/              CI: lint, validate, deploy
+```
+
+## Using this index
+
+mcpp registers `mcpp-index` automatically as the default registry. With a
+fresh `mcpp` install:
+
+```bash
+mcpp env                                     # initializes ~/.mcpp/registry/
+mcpp search hello                             # searches mcpp-index
+mcpp add mcpplibs.templates@0.0.1             # adds to your project's mcpp.toml
+mcpp build                                    # mcpp pulls source via xlings, builds
+```
+
+## Adding a package
+
+See [docs/19-creating-mcpp-index.md](https://github.com/mcpp-community/mcpp/blob/dev/docs/19-creating-mcpp-index.md) in the mcpp repo.
+
+## License
+
+Package descriptions: CC0 (metadata is uncopyrightable). Each indexed package
+has its own license.

pkgs/m/mcpplibs.templates.lua

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+-- AUTO-GENERATED by mcpp emit xpkg-equivalent (manual seed).
+-- Source: https://github.com/mcpp-community/templates @ v0.0.1
+package = {
+    spec = "1",
+    name = "mcpplibs.templates",
+    description = "Minimal C++23 modular hello library",
+    licenses = {"Apache-2.0"},
+    repo = "https://github.com/mcpp-community/templates",
+    type = "package",
+
+    xpm = {
+        linux = {
+            ["0.0.1"] = {
+                url = "https://github.com/mcpp-community/templates/archive/refs/tags/v0.0.1.tar.gz",
+                sha256 = "348640a5b8fb09c6392e5487234f426f0d1dd6b1ed46e6644cdec3c9d65e7fd3",
+            },
+        },
+        macosx = {
+            ["0.0.1"] = {
+                url = "https://github.com/mcpp-community/templates/archive/refs/tags/v0.0.1.tar.gz",
+                sha256 = "348640a5b8fb09c6392e5487234f426f0d1dd6b1ed46e6644cdec3c9d65e7fd3",
+            },
+        },
+        windows = {
+            ["0.0.1"] = {
+                url = "https://github.com/mcpp-community/templates/archive/refs/tags/v0.0.1.tar.gz",
+                sha256 = "348640a5b8fb09c6392e5487234f426f0d1dd6b1ed46e6644cdec3c9d65e7fd3",
+            },
+        },
+    },
+
+    mcpp = {
+        schema     = "0.1",
+        language   = "c++23",
+        import_std = true,
+        modules    = { "mcpplibs.templates" },
+        deps       = { },
+        manifest   = "mcpp.toml",
+    },
+}