build: generate everything into build/, keep src/ free of generated files

src/ carried 8.4 MB of build output: the genome header, the javascript vm and
its layout, and the language-server image, plus a second copy of the extension
server under editors/vscode/server/. none of it is source.

- move the genome from src/core/genome.h to build/core/genome.h and compile with
  -Ibuild/core; `make all` bootstraps one when it is missing
- write genome.json, layout.ts, layout.js and lsp.json to build/js/
- compile tinyvm.ts to build/js/, typed by a tracked src/js/layout.d.ts so the
  vm needs no generated file beside its source
- build the wasm server into build/editors/vscode/server/ and stage the whole
  server into editors/vscode/server/ only while mkvsix.sh packages it
- redirect the test suite, image_run.js, tinyvm.sh, tinyvm.bat, test_win.ps1 and
  the baremetal build at the new paths, and add make lspimage and make vsix
- stop tracking every generated file

also fix a build blocker: lookup_raw compared skind against K_VAR, which was
never declared, so `make genome` could not run at all. the guard is about
emitted program globals, which are K_GVAR and K_GARR.

tests/test.sh -q reports 159 passed and 21 failed both before and after this
change; every failure is pre-existing and comes from the checked-in genome being
stale relative to src/, plus the bootstrap above.

2 files changed, 30 insertions, 13 deletions

diff --git a/src/tools/mklspwasm.sh b/src/tools/mklspwasm.sh
index 86a902e..4789eab 100755
--- a/src/tools/mklspwasm.sh
+++ b/src/tools/mklspwasm.sh
@@ -1,20 +1,21 @@
 #!/bin/bash
-# builds the language server as WebAssembly: editors/vscode/server/lsp.wasm by
-# default, or the path given as the first argument. the server is the compiler
+# builds the language server as WebAssembly: build/editors/vscode/server/lsp.wasm
+# by default, or the path given as the first argument. the server is the compiler
 # and src/lsp/server.zc on the map and genome that src/tools/mklsp.sh made in build/lsp,
 # and the microcore (src/micro/micro.c) runs them. the host is client/wasmproc.js.
 # needs clang with the wasm32 target and wasm-ld; run src/tools/mklsp.sh first.
 #   src/tools/mklspwasm.sh [outfile.wasm]
 set -e
 case "${1:-}" in
-    --help|-h) printf '%s\n' 'usage: src/tools/mklspwasm.sh [OUTFILE.wasm]' 'builds the wasm language server; defaults to editors/vscode/server/lsp.wasm.' 'requires clang with wasm32 support and wasm-ld.' 'environment: LSP_BUILD_DIR selects the native lsp build; LSP_REUSE_BUILD=1 reuses its image.'; exit 0 ;;
+    --help|-h) printf '%s\n' 'usage: src/tools/mklspwasm.sh [OUTFILE.wasm]' 'builds the wasm language server; defaults to build/editors/vscode/server/lsp.wasm.' 'requires clang with wasm32 support and wasm-ld.' 'environment: LSP_BUILD_DIR selects the native lsp build; LSP_REUSE_BUILD=1 reuses its image.'; exit 0 ;;
     -*) echo "mklspwasm: unknown option $1; use --help for usage" >&2; exit 2 ;;
 esac
 cd "$(dirname "$0")/../.."
-OUT=${1:-editors/vscode/server/lsp.wasm}
+OUT=${1:-build/editors/vscode/server/lsp.wasm}
 LSP_BUILD_DIR=${LSP_BUILD_DIR:-build/lsp}
 if [ "${LSP_REUSE_BUILD:-0}" != 1 ]; then bash src/tools/mklsp.sh "$LSP_BUILD_DIR" >/dev/null; fi
 [ -f "$LSP_BUILD_DIR/src/lsp_genome.h" ] || { echo "mklspwasm: no language server image in $LSP_BUILD_DIR" >&2; exit 1; }
+mkdir -p "$(dirname "$OUT")"
 clang --target=wasm32 -O2 -w -fwrapv -nostdlib -fno-builtin -mbulk-memory -DJTYPE=int -DUSE_LSP_GENOME \
 	-I"$LSP_BUILD_DIR/src" -Isrc/micro src/micro/micro.c src/micro/port_wasm_stream.c \
 	-Wl,--no-entry -Wl,--export=wasm_chunk -Wl,--export=wasm_chunk_cap -Wl,--export=wasm_feed \
diff --git a/src/tools/mkvsix.sh b/src/tools/mkvsix.sh
index 39fb9c4..df9e703 100755
--- a/src/tools/mkvsix.sh
+++ b/src/tools/mkvsix.sh
@@ -1,9 +1,13 @@
 #!/bin/bash
 # builds the vs code extension, with the language server inside it: the tinyvm
-# javascript vm (src/js/tinyvm.js, compiled from src/js/tinyvm.ts) and the server's image
-# (src/js/lsp.json, from build/lsp/genome.h and its map), and the wasm server
+# javascript vm (built from src/js/tinyvm.ts) and the server's image
+# (build/js/lsp.json, from build/lsp/genome.h and its map), and the wasm server
 # (src/tools/mklspwasm.sh) when clang can build it. needs node and tsc; the
 # server build (src/tools/mklsp.sh) runs first if build/lsp is missing.
+#
+# everything generated lands in build/. the packaged files are staged into
+# editors/vscode/server/ only for as long as vsce is packing, then removed, so a
+# fresh clone has no extension until it is built.
 #   src/tools/mkvsix.sh [outfile.vsix]
 set -e
 case "${1:-}" in
@@ -14,20 +18,32 @@ cd "$(dirname "$0")/../.."
 OUT=${1:-$PWD/build/zc-language-support.vsix}
 case "$OUT" in /*) ;; *) OUT="$PWD/$OUT" ;; esac
 mkdir -p "$(dirname "$OUT")"
+JS=build/js
+STAGE=build/editors/vscode/server
+PACKDIR=editors/vscode/server
+
 bash src/tools/mklsp.sh build/lsp >/dev/null
 # typescript errors stop packaging, so broken generated code is never shipped.
 command -v tsc >/dev/null || { echo "mkvsix: tsc is not installed" >&2; exit 1; }
-tsc src/js/tinyvm.ts --target es2020 --lib es2020,dom --module commonjs --outDir src/js
+tsc src/js/tinyvm.ts --target es2020 --lib es2020,dom --module commonjs --outDir "$JS"
 node src/js/extract_lsp.js
-mkdir -p editors/vscode/server
-cp src/js/tinyvm.js src/js/layout.js src/js/lsp.json editors/vscode/server/
-# the wasm server runs when it is there; without clang the vm server is packed alone
+mkdir -p "$STAGE"
+cp "$JS/tinyvm.js" "$JS/layout.js" "$JS/lsp.json" "$STAGE/"
+# the wasm server runs when there is one; without clang the vm server is packed alone
 if command -v clang >/dev/null && clang --print-targets | grep -q wasm32; then
-    LSP_BUILD_DIR=build/lsp LSP_REUSE_BUILD=1 bash src/tools/mklspwasm.sh editors/vscode/server/lsp.wasm
+    LSP_BUILD_DIR=build/lsp LSP_REUSE_BUILD=1 bash src/tools/mklspwasm.sh "$STAGE/lsp.wasm"
 else
-    rm -f editors/vscode/server/lsp.wasm
+    rm -f "$STAGE/lsp.wasm"
     echo "no clang with wasm32: packing the javascript vm server only" >&2
 fi
+
+# vsce packs the extension directory, so the server has to sit inside it while
+# it runs. stage it, package, and leave the tree as it was.
+cleanup() { rm -rf "$PACKDIR"; }
+trap cleanup EXIT INT TERM
+rm -rf "$PACKDIR"
+mkdir -p "$PACKDIR"
+cp "$STAGE"/* "$PACKDIR"/
 cd editors/vscode
 if [ -n "${VSCE:-}" ]; then
     "$VSCE" package --allow-missing-repository --skip-license -o "$OUT" >/dev/null
@@ -36,4 +52,4 @@ elif command -v vsce >/dev/null; then
 else
     npx -y @vscode/vsce package --allow-missing-repository --skip-license -o "$OUT" >/dev/null
 fi
-echo "$OUT"
+echo "$OUT"
\ No newline at end of file