fix(aur): rename source package mcpp -> mcpp-m (extra/mcpp name clash)

The AUR rejected publishing a package named `mcpp`:

  remote: error: package already provided by [extra]: mcpp

`extra/mcpp` is Matsui's C preprocessor (an unrelated official package that
owns /usr/bin/mcpp). AUR forbids reusing an official-repo pkgname/provides,
so the from-source package is now `mcpp-m`.

- Rename scripts/aur/mcpp -> scripts/aur/mcpp-m (pkgname=mcpp-m).
- mcpp-bin: drop the bogus provides=('mcpp') (that name is the preprocessor),
  set conflicts=('mcpp-m' 'mcpp') — both ship /usr/bin/mcpp so they conflict
  with the preprocessor and with each other.
- mcpp-m: conflicts=('mcpp-bin' 'mcpp').
- update.sh / aur-publish.yml / README updated for the new name + rationale.

Author: Sunrisepeak

.github/workflows/aur-publish.yml

@@ -99,4 +99,4 @@ jobs:
           }
 
           publish mcpp-bin
-          publish mcpp
+          publish mcpp-m

scripts/aur/README.md

@@ -5,16 +5,25 @@ Arch Linux packaging for mcpp. Two packages, same runtime layout:
 | Package | What it installs | Pick it when |
 | --- | --- | --- |
 | [`mcpp-bin`](mcpp-bin/) | the **prebuilt** release binary (what [`install.sh`](../../install.sh) downloads) | you just want mcpp, fast |
-| [`mcpp`](mcpp/) | mcpp **built from source**, bootstrapped with `mcpp-bin` | you want a from-source build |
+| [`mcpp-m`](mcpp-m/) | mcpp **built from source**, bootstrapped with `mcpp-bin` | you want a from-source build |
 
 ```sh
 yay -S mcpp-bin      # prebuilt
-yay -S mcpp          # from source (pulls mcpp-bin as a build dep)
+yay -S mcpp-m        # from source (pulls mcpp-bin as a build dep)
 ```
 
-Both `provides`/`conflicts` each other, so only one can be installed at a time.
+The two `conflict` with each other, so only one can be installed at a time.
 Supported architectures: `x86_64`, `aarch64`.
 
+### Why not just `mcpp`?
+
+The name `mcpp` is already taken by **`extra/mcpp`** — Matsui's C preprocessor,
+an unrelated long-standing official Arch package that owns `/usr/bin/mcpp`. The
+AUR refuses to host any package whose `pkgname` (or `provides`) collides with an
+official-repo package, so our packages are `mcpp-bin` / `mcpp-m`. They still
+install the `mcpp` command at `/usr/bin/mcpp`, so both `conflicts=('mcpp')` with
+that preprocessor — you can have our mcpp or the preprocessor, not both.
+
 ## Layout & why the wrapper exists
 
 mcpp ships as a single self-contained tree. At runtime it **writes** into
@@ -43,9 +52,9 @@ user already exported, so a custom home or xlings still works.
 First `mcpp build`/`mcpp run` bootstraps the sandbox (downloads ninja, patchelf
 and the default toolchain into `~/.mcpp`) — expected, and only once per user.
 
-### How the `mcpp` source package builds
+### How the `mcpp-m` source package builds
 
-mcpp is self-hosting. The `mcpp` PKGBUILD uses the installed `mcpp-bin` as the
+mcpp is self-hosting. The `mcpp-m` PKGBUILD uses the installed `mcpp-bin` as the
 bootstrap compiler and runs `mcpp build --target <arch>-linux-musl` — the same
 path [`release.yml`](../../.github/workflows/release.yml) ships. mcpp downloads
 its own pinned toolchain (it does **not** use the host gcc), so the build needs
@@ -58,7 +67,7 @@ scripts/aur/
   README.md            this file
   update.sh            bump BOTH packages to a release version
   mcpp-bin/{PKGBUILD, .SRCINFO, mcpp.sh}
-  mcpp/{PKGBUILD, .SRCINFO, mcpp.sh}
+  mcpp-m/{PKGBUILD, .SRCINFO, mcpp.sh}
 ```
 
 `mcpp.sh` is identical in both dirs (each AUR repo must be self-contained);
@@ -74,14 +83,14 @@ scripts/aur/update.sh            # uses [package].version from mcpp.toml
 ```
 
 `update.sh` pulls the per-arch `.sha256` sidecars (for `mcpp-bin`) and hashes
-the source archive (for `mcpp`), rewrites `pkgver` + checksums, resets
+the source archive (for `mcpp-m`), rewrites `pkgver` + checksums, resets
 `pkgrel=1`, and regenerates both `.SRCINFO` files.
 
 ### Test locally (on Arch)
 
 ```sh
 cd scripts/aur/mcpp-bin && makepkg -si        # prebuilt
-cd scripts/aur/mcpp     && makepkg -si        # from source (slow: builds mcpp)
+cd scripts/aur/mcpp-m   && makepkg -si        # from source (slow: builds mcpp)
 mcpp --version
 ```
 
@@ -99,7 +108,7 @@ PKGBUILDs via `update.sh`, and pushes each package to its AUR git repo over SSH.
 ### One-time setup you need to do
 
 1. **AUR account** — sign in at <https://aur.archlinux.org> with the account
-   that will own `mcpp` / `mcpp-bin`.
+   that will own `mcpp-bin` / `mcpp-m`.
 
 2. **Generate a dedicated SSH key** (no passphrase, it's for CI):
 
@@ -131,7 +140,7 @@ prefer to claim them by hand first, push an initial commit manually:
 ```sh
 git clone ssh://aur@aur.archlinux.org/mcpp-bin.git
 cp scripts/aur/mcpp-bin/{PKGBUILD,.SRCINFO,mcpp.sh} mcpp-bin/ && cd mcpp-bin
-git add -A && git commit -m "initial mcpp-bin" && git push   # repeat for mcpp
+git add -A && git commit -m "initial mcpp-bin" && git push   # repeat for mcpp-m
 ```
 
 After that, every release publishes both packages with no manual step. You can

scripts/aur/mcpp-bin/.SRCINFO

@@ -7,7 +7,7 @@ pkgbase = mcpp-bin
 	arch = aarch64
 	license = Apache-2.0
 	depends = git
-	provides = mcpp
+	conflicts = mcpp-m
 	conflicts = mcpp
 	options = !strip
 	source = mcpp.sh

scripts/aur/mcpp-bin/PKGBUILD

@@ -13,8 +13,10 @@ url="https://github.com/mcpp-community/mcpp"
 license=('Apache-2.0')
 # mcpp/xlings are statically linked; git is used for package-index sync.
 depends=('git')
-provides=('mcpp')
-conflicts=('mcpp')
+# mcpp-m = same tool (mutually exclusive); mcpp = Matsui's C preprocessor
+# (extra/mcpp), which also owns /usr/bin/mcpp. No `provides=mcpp` — that name
+# is the preprocessor, not us.
+conflicts=('mcpp-m' 'mcpp')
 # Prebuilt upstream binaries — do not strip/repackage them.
 options=('!strip')
 

scripts/aur/mcpp/.SRCINFO scripts/aur/mcpp-m/.SRCINFOscripts/aur/mcpp/.SRCINFO renamed to scripts/aur/mcpp-m/.SRCINFO

@@ -1,4 +1,4 @@
-pkgbase = mcpp
+pkgbase = mcpp-m
 	pkgdesc = Modern C++ build & package management tool (built from source)
 	pkgver = 0.0.65
 	pkgrel = 1
@@ -10,10 +10,11 @@ pkgbase = mcpp
 	makedepends = git
 	depends = git
 	conflicts = mcpp-bin
+	conflicts = mcpp
 	options = !strip
 	source = mcpp-0.0.65.tar.gz::https://github.com/mcpp-community/mcpp/archive/v0.0.65.tar.gz
 	source = mcpp.sh
 	sha256sums = 07f8233d3f18565c52607816a82c9facda3a7ed11c67d3772e42bd84cb54476a
 	sha256sums = SKIP
 
-pkgname = mcpp
+pkgname = mcpp-m

scripts/aur/mcpp/PKGBUILD scripts/aur/mcpp-m/PKGBUILDscripts/aur/mcpp/PKGBUILD renamed to scripts/aur/mcpp-m/PKGBUILD

@@ -1,12 +1,16 @@
 # Maintainer: mcpp-community <x.d2learn.org@gmail.com>
 #
-# mcpp — built from source, bootstrapped with the prebuilt `mcpp-bin`.
+# mcpp-m — mcpp built from source, bootstrapped with the prebuilt `mcpp-bin`.
 # mcpp is self-hosting: the mcpp-bin compiler builds this release's own
 # source (the same `mcpp build --target <arch>-linux-musl` path release.yml
 # ships). For the prebuilt-only package, install `mcpp-bin` instead.
+#
+# NB: the AUR/official name `mcpp` is taken by Matsui's C preprocessor
+# (extra/mcpp), so this package is `mcpp-m`. It still installs the `mcpp`
+# command at /usr/bin/mcpp, hence the conflict with that preprocessor.
 # See scripts/aur/README.md.
 
-pkgname=mcpp
+pkgname=mcpp-m
 pkgver=0.0.65
 pkgrel=1
 pkgdesc="Modern C++ build & package management tool (built from source)"
@@ -18,7 +22,9 @@ depends=('git')
 # mcpp-bin is the bootstrap compiler; it also supplies the bundled xlings we
 # ship at runtime. git is needed for toolchain/index sync during the build.
 makedepends=('mcpp-bin' 'git')
-conflicts=('mcpp-bin')
+# mcpp-bin = same tool (mutually exclusive); mcpp = the C preprocessor that
+# also owns /usr/bin/mcpp.
+conflicts=('mcpp-bin' 'mcpp')
 # We strip the built ELF ourselves; don't let makepkg re-strip the vendored
 # xlings binary (a prebuilt third-party artifact).
 options=('!strip')

scripts/aur/mcpp/mcpp.sh scripts/aur/mcpp-m/mcpp.shscripts/aur/mcpp/mcpp.sh renamed to scripts/aur/mcpp-m/mcpp.sh

@@ -2,7 +2,7 @@
 # scripts/aur/update.sh — bump BOTH AUR packages to a release version.
 #
 #   mcpp-bin/   prebuilt release binaries (per-arch tarball checksums)
-#   mcpp/       built from source via mcpp-bin (source-archive checksum)
+#   mcpp-m/     built from source via mcpp-bin (source-archive checksum)
 #
 # Pulls checksums straight from the GitHub release / archive, rewrites each
 # PKGBUILD's pkgver + sums, resets pkgrel to 1, regenerates both .SRCINFO
@@ -42,13 +42,13 @@ done
 x86=${SUMS[linux-x86_64]}
 arm=${SUMS[linux-aarch64]}
 
-# --- source-archive checksum (mcpp) ----------------------------------------
+# --- source-archive checksum (mcpp-m) ----------------------------------------
 echo ":: hashing source archive ${archive_url}"
 src=$(curl -fsSL --connect-timeout 30 "$archive_url" | sha256sum | awk '{print $1}')
 [[ -n "$src" ]] || { echo "error: cannot hash source archive" >&2; exit 1; }
 
 # --- keep the wrapper in sync ----------------------------------------------
-cp -f mcpp-bin/mcpp.sh mcpp/mcpp.sh 2>/dev/null || true
+cp -f mcpp-bin/mcpp.sh mcpp-m/mcpp.sh 2>/dev/null || true
 
 # --- rewrite mcpp-bin/PKGBUILD ---------------------------------------------
 sed -i -E \
@@ -58,12 +58,12 @@ sed -i -E \
     -e "s/^sha256sums_aarch64=\('[^']*'\)/sha256sums_aarch64=('${arm}')/" \
     mcpp-bin/PKGBUILD
 
-# --- rewrite mcpp/PKGBUILD -------------------------------------------------
+# --- rewrite mcpp-m/PKGBUILD ---------------------------------------------
 sed -i -E \
     -e "s/^pkgver=.*/pkgver=${VER}/" \
     -e "s/^pkgrel=.*/pkgrel=1/" \
     -e "s/^sha256sums=\('[^']*'\)/sha256sums=('${src}')/" \
-    mcpp/PKGBUILD
+    mcpp-m/PKGBUILD
 
 # --- regenerate .SRCINFO files ---------------------------------------------
 # Prefer makepkg's own generator on an Arch host; fall back to templates so
@@ -87,7 +87,7 @@ pkgbase = mcpp-bin
 	arch = aarch64
 	license = Apache-2.0
 	depends = git
-	provides = mcpp
+	conflicts = mcpp-m
 	conflicts = mcpp
 	options = !strip
 	source = mcpp.sh
@@ -100,9 +100,9 @@ pkgbase = mcpp-bin
 pkgname = mcpp-bin
 EOF
             ;;
-        mcpp)
-            cat > mcpp/.SRCINFO <<EOF
-pkgbase = mcpp
+        mcpp-m)
+            cat > mcpp-m/.SRCINFO <<EOF
+pkgbase = mcpp-m
 	pkgdesc = Modern C++ build & package management tool (built from source)
 	pkgver = ${VER}
 	pkgrel = 1
@@ -114,22 +114,23 @@ pkgbase = mcpp
 	makedepends = git
 	depends = git
 	conflicts = mcpp-bin
+	conflicts = mcpp
 	options = !strip
 	source = mcpp-${VER}.tar.gz::${archive_url}
 	source = mcpp.sh
 	sha256sums = ${src}
 	sha256sums = SKIP
 
-pkgname = mcpp
+pkgname = mcpp-m
 EOF
             ;;
     esac
 }
 _srcinfo mcpp-bin
-_srcinfo mcpp
+_srcinfo mcpp-m
 
 echo ":: updated to v${VER}"
 echo "   mcpp-bin  x86_64   ${x86}"
 echo "   mcpp-bin  aarch64  ${arm}"
-echo "   mcpp      source   ${src}"
+echo "   mcpp-m  source   ${src}"
 echo ":: review, then publish each package (see scripts/aur/README.md)"