Bootstrap rewrite by bgamari

.github/workflows/bootstrap.yml

@@ -21,19 +21,13 @@ jobs:
     name: Bootstrap on Linux
     runs-on: ubuntu-18.04
     steps:
-      - name: Set PATH
-        run: |
-          echo "::add-path::/opt/ghc/8.6.5/bin"
       - uses: actions/checkout@v2
-      - name: bootstrap.sh
-        env:
-          EXTRA_CONFIGURE_OPTS: ""
+      - name: bootstrap.py
         run: |
-          cd cabal-install
-          sh ./bootstrap.sh --no-doc
+          python3 bootstrap/bootstrap.py -w /opt/ghc/8.6.5/bin/ghc -d bootstrap/linux-8.6.5.json
       - name: Smoke test
         run: |
-          $HOME/.cabal/bin/cabal --version
+          packages/tmp/bin/cabal --version
 
   boostrap-macos:
     name: Bootstrap on macOS
@@ -47,17 +41,13 @@ jobs:
           cd ghc-*
           ./configure --prefix=/opt/ghc/8.6.5
           sudo make install
-      - name: Set PATH
-        run: |
-          echo "::add-path::/opt/ghc/8.6.5/bin"
-          echo "::add-path::$HOME/.cabal/bin"
       - uses: actions/checkout@v2
-      - name: bootstrap.sh
-        env:
-          EXTRA_CONFIGURE_OPTS: ""
+
+      # We use linux dependencies
+      - name: bootstrap.py
         run: |
-          cd cabal-install
-          sh ./bootstrap.sh --no-doc
+          python3 bootstrap/bootstrap.py -w /opt/ghc/8.6.5/bin/ghc -d bootstrap/linux-8.6.5.json
+
       - name: Smoke test
         run: |
-          $HOME/.cabal/bin/cabal --version
+          packages/tmp/bin/cabal --version

Makefile

@@ -221,6 +221,25 @@ weeder :
 tags :
 	hasktags -b Cabal/src Cabal/Cabal-described/src cabal-install/src cabal-testsuite/src
 
+# boostrapping
+##############################################################################
+
+bootstrap-plans-linux: phony
+	@if [ $$(uname) != "Linux" ]; then echo "Not Linux"; false; fi
+	cabal v2-build --project=cabal.project.release --with-compiler ghc-8.6.5  --dry-run cabal-install:exe:cabal
+	cp dist-newstyle/cache/plan.json bootstrap/linux-8.6.5.plan.json
+	cabal v2-build --project=cabal.project.release --with-compiler ghc-8.8.3  --dry-run cabal-install:exe:cabal
+	cp dist-newstyle/cache/plan.json bootstrap/linux-8.8.3.plan.json
+	cabal v2-build --project=cabal.project.release --with-compiler ghc-8.10.1 --dry-run cabal-install:exe:cabal
+	cp dist-newstyle/cache/plan.json bootstrap/linux-8.10.1.plan.json
+
+bootstrap-jsons-linux: phony
+	@if [ $$(uname) != "Linux" ]; then echo "Not Linux"; false; fi
+	cabal v2-build               --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen
+	cabal v2-run -vnormal+stderr --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen -- bootstrap/linux-8.6.5.plan.json  | python -m json.tool | tee bootstrap/linux-8.6.5.json
+	cabal v2-run -vnormal+stderr --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen -- bootstrap/linux-8.8.3.plan.json  | python -m json.tool | tee bootstrap/linux-8.8.3.json
+	cabal v2-run -vnormal+stderr --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen -- bootstrap/linux-8.10.1.plan.json | python -m json.tool | tee bootstrap/linux-8.10.1.json
+
 # documentation
 ##############################################################################
 
@@ -238,5 +257,3 @@ $(USERGUIDE_STAMP) : doc/*.rst
 .python-sphinx-virtualenv:
 	python3 -m venv .python-sphinx-virtualenv
 	(. ./.python-sphinx-virtualenv/bin/activate)
-
-

bootstrap/README.md

@@ -0,0 +1,31 @@
+# Bootstrapping cabal-install
+
+This utility is only intended for use in building cabal-install
+on a new platform. If you already have a functional (if dated) cabal-install
+please rather run `cabal v2-install`.
+
+The typical usage is porting to a new linux architecture,
+then the `linux-ghcvec.json` file is available in `bootstrap/` folder:
+
+On a (linux) system you are boostrapping, run
+
+    bootstrap.py -d linux-ghcver.json -w /path/to-ghc
+
+To generate the `platform-ghcver` files for other platforms, do:
+
+  1. On a system with functional cabal-install, install the same GHC version
+     as you will use to bootstrap on the host system.
+
+  2. Build a dependency description file (`platform-ghcver.json`, e.g. `linux-8.8.3.json`) by running:
+
+       ```sh
+       cabal v2-build --with-compiler=/path/to/ghc --dry-run cabal-install:exe:cabal
+       cp dist-newstyle/cache/plan.json bootstrap/platform-ghcver.plan.json
+       cabal v2-build               --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen
+       cabal v2-run -vnormal+stderr --builddir=dist-newstyle-bootstrap --project=cabal.project.bootstrap cabal-bootstrap-gen -- bootstrap/platform-ghcver.plan.json | tee bootstrap/platform-ghcver.json
+       ```
+
+  3. You may need to tweak `bootstrap/platform-ghcver.json` file manually,
+     for example toggle flags.
+
+There are rules in top-level `Makefile` for generation of these files.