[bug#55227] [PATCH core-updates 2/8] commencement: Add stage0-posix.

["Jan (janneke) Nieuwenhuizen" <janneke@gnu.org>]

Stage0-posix is a skeleton for bootstrapping all of Stage0 for POSIX systems.
On x86-linux, from the 357-byte hex0-seed binary from the bootstrap-seeds, it
builds hex0, kaem, hex1, catm, hex2, M0, cc_x86, M1, M2,
get_machine, (mescc-tools), and M2-Planet.

* gnu/packages/commencement.scm (stage0-posix): New variable.
---
 gnu/packages/commencement.scm | 109 ++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)

diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index 663ffacd56..24e1e6ec8c 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -306,6 +306,115 @@ (define bootstrap-seeds
 M1, and M2-Planet.")
     (license license:gpl3+)))
 
+(define stage0-posix
+  ;; The initial bootstrap package: no binary inputs except those from
+  ;; `bootstrap-seeds, for x86 a 357 byte binary seed: `x86/hex0-seed'.
+  (let ((mescc-tools-version "1.4.0")
+        (m2-planet-version "1.9.0"))
+    (package
+      (name "stage0-posix")
+      (version "1.4")
+      (source (bootstrap-origin
+               (origin
+                 (method url-fetch)
+                 (uri (string-append
+                       "https://lilypond.org/janneke/guix/20220502/"
+                       "stage0-posix-" version ".tar.gz"))
+                 (sha256
+                  (base32
+                   "1ammifkj33205qrpfm84yb1c99lwgbn4jsl1hd08aab8c9ffz6p4")))))
+      (native-inputs
+       `(("bootstrap-seeds" ,bootstrap-seeds)
+         ("mescc-tools"
+          ,(bootstrap-origin
+            (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://lilypond.org/janneke/guix/20220502/"
+                    "mescc-tools-" mescc-tools-version ".tar.gz"))
+              (sha256
+               (base32
+                "1xi6f48pf5bhajhfis189gpizxij7nbp1vzvsb1aafhz4skkiqvg")))))
+         ("m2-planet"
+          ,(bootstrap-origin
+            (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://lilypond.org/janneke/guix/20220502/"
+                    "M2-Planet-" m2-planet-version ".tar.gz"))
+              (sha256
+               (base32
+                "1xrn69sc5nz4hwaishqyrcidp1ncxwib9zswl45x378ddz3mmk7g")))))
+         ,@(%boot-gash-inputs)))
+      (build-system trivial-build-system)
+      (arguments
+       `(#:guile ,%bootstrap-guile
+         #:modules ((guix build utils))
+         #:builder
+         (begin
+           (use-modules (guix build utils))
+           (let* ((bootstrap-seeds (assoc-ref %build-inputs "bootstrap-seeds"))
+                  (mescc-tools (assoc-ref %build-inputs "mescc-tools"))
+                  (m2-planet (assoc-ref %build-inputs "m2-planet"))
+                  (source (assoc-ref %build-inputs "source"))
+                  (tar (assoc-ref %build-inputs "bootar"))
+                  (bash (assoc-ref %build-inputs "bash"))
+                  (coreutils (assoc-ref %build-inputs "coreutils"))
+                  (guile (assoc-ref %build-inputs "guile"))
+                  (out (assoc-ref %outputs "out"))
+                  (bindir (string-append out "/bin"))
+                  (target (or ,(%current-target-system)
+                              ,(%current-system)))
+                  (stage0-cpu
+                   (cond
+                    ((or (string-prefix? "x86_64-linux" target)
+                         (string-prefix? "i686-linux" target))
+                     "x86")
+                    ((or (string-prefix? "aarch64-linux" target)
+                         (string-prefix? "armhf-linux" target))
+                     "armv7l")
+                    (else
+                     (error "stage0-posix: system not supported" target))))
+                  (kaem (string-append "../bootstrap-seeds/POSIX/"
+                                       stage0-cpu "/kaem-optional-seed")))
+             (setenv "PATH" (string-append tar "/bin:"
+                                           coreutils "/bin:"
+                                           bash "/bin"))
+             (invoke "tar" "xvf" source)
+             (chdir (string-append "stage0-posix-" ,version))
+             (copy-recursively bootstrap-seeds "bootstrap-seeds")
+             (invoke "tar" "xvf" mescc-tools)
+             (rmdir "mescc-tools")
+             (symlink (string-append "mescc-tools-" ,mescc-tools-version)
+                      "mescc-tools")
+             (invoke "tar" "xvf" m2-planet)
+             (rmdir "M2-Planet")
+             (symlink (string-append "M2-Planet-" ,m2-planet-version)
+                      "M2-Planet")
+             (rmdir "M2libc")
+             (symlink "M2-Planet/M2libc" "M2libc")
+             (mkdir-p bindir)
+             (with-directory-excursion stage0-cpu
+               (with-output-to-file "mes-m2.kaem"
+                 (lambda _ (display "")))
+               (with-output-to-file "mescc-tools-extra.kaem"
+                 (lambda _ (display "")))
+               (invoke kaem "kaem.run"))
+             (with-directory-excursion "bin"
+               (install-file "hex2" bindir)
+               (install-file "M1" bindir)
+               (install-file "blood-elf" bindir)
+               (install-file "kaem" bindir)
+               (install-file "get_machine" bindir)
+               (install-file "M2-Planet" bindir))))))
+      (home-page "https://github.com/oriansj/stage0-posix/")
+      (synopsis "The initial bootstrap package, builds stage0 up to M2-Planet")
+      (description
+       "Starting from an 357-byte hex0 provided by the bootstrap-seeds,
+stage0-posix builds hex0, kaem, hex1, catm, hex2, M0, cc_x86, M1,
+M2, get_machine, (mescc-tools), and M2-Planet.")
+      (license license:gpl3+))))
+
 (define %bootstrap-mes-rewired
   (package
     (inherit mes)
-- 
2.35.1