refurbish pip/meson/pipenv with state of the art techniques (#4756)

projects/mesonbuild.com/package.yml

@@ -6,10 +6,15 @@ versions:
   github: mesonbuild/meson/tags
 
 dependencies:
-  python.org: '>=3<3.12'
+  pkgx.sh: ^1
 
 build:
-  python-venv.sh "{{prefix}}/bin/meson"
+  dependencies:
+    python.org: ~3.11
+  script:
+    - bkpyvenv stage {{prefix}} {{version}}
+    - ${{prefix}}/venv/bin/pip install .
+    - bkpyvenv seal {{prefix}} meson
 
 test:
   dependencies:

projects/pip.pypa.io/package.yml

@@ -8,46 +8,57 @@ versions:
   ignore: ['<18']
 
 dependencies:
-  python.org: '*' #FIXME actually: ^3.7
-  # FIXME deps vary by version for the above and we don’t support that yet
-
-runtime:
-  env:
-    PIP_DISABLE_PIP_VERSION_CHECK: 1
-    PYTHONPATH: ${{prefix}}:$PYTHONPATH
+  pkgx.sh: ^1
 
 build:
   dependencies:
-    curl.se: '*'
-  script: |
-    curl -O https://bootstrap.pypa.io/get-pip.py
-
-    test -d bootstrap || mkdir bootstrap
-
-    python get-pip.py --target="$(pwd)/bootstrap"
-
-    PYTHONPATH=$(pwd)/bootstrap python -m pip install . --target={{prefix}}
-
-    cd {{prefix}}
-    for binfile in $shebangs; do
-      sed -i.bak -e 's|#!{{ deps.python.org.prefix }}/bin/|#!/usr/bin/env |g' $binfile
-      rm $binfile.bak
-    done
-    rm -f bin/pip{{deps.python.org.version.major}}.{{deps.python.org.version.minor}}
-
-  env:
-    shebangs:
-      - bin/pip
-      - bin/pip{{deps.python.org.version.major}}
-test:
-  dependencies:
-    tea.xyz: '*'
+    python.org: ^3.7
+    crates.io/semverator: ^0.4.3
   script:
-    - run: tea +python.org~3.9 pip install findtui --target .
-      if: ~18
-    - run: pip install findtui --target .
-      if: '>=19'
-    - test -f findtui/main.py
+  - pkgx curl -O https://bootstrap.pypa.io/get-pip.py
+
+  - test -d bootstrap || mkdir bootstrap
+
+  - python get-pip.py --target="$(pwd)/bootstrap"
+
+  - PYTHONPATH=$(pwd)/bootstrap python -m pip install . --target={{prefix}}/lib
+
+  # provide pip3.7 — pip3.12 (or whatever is latest)
+  # they will automatically use the correct python versions
+  - run: |
+      v=3.6
+      while semverator lt $v {{deps.python.org.version.marketing}}; do
+        v=$(semverator bump $v minor | cut -d. -f1,2)
+        cp $PROP pip$v
+        echo "exec pkgx python@$v \$d/lib/bin/pip \"\$@\"" >> pip$v
+      done
+
+      cp $PROP pip{{ deps.python.org.version.major }}
+      echo 'exec pkgx python@{{ deps.python.org.version.major }} $d/lib/bin/pip "$@"' >> pip{{ deps.python.org.version.major }}
+
+      cp $PROP pip
+      echo 'exec pkgx python $d/lib/bin/pip "$@"' >> pip
+
+      rm {{prefix}}/lib/bin/pip?*
+    working-directory:
+      ${{prefix}}/bin
+    prop: |
+      #!/bin/sh
+      d="$(cd "$(dirname "$0")"/.. && pwd)"
+      export PIP_DISABLE_PIP_VERSION_CHECK=1
+      export PYTHONPATH="$d:$PYTHONPATH"
+
+  - fix-shebangs.ts {{prefix}}/lib/bin/*
+
+test:
+  - run: pkgx +python.org~3.9 pip install findtui --target .
+    if: ~18
+  - run:
+      - pip install findtui --target foo
+      - pip3.10 install findtui --target .
+    if: '>=19'
+
+  - test -f findtui/main.py
 
 provides:
   - bin/pip

projects/pipenv.pypa.io/package.yml

@@ -6,19 +6,20 @@ versions:
   github: pypa/pipenv/releases/tags
   strip: /^v/
 
-dependencies:
-  tea.xyz: ^0
-
 companions:
-  python.org: '>=3.7<3.12'
   pip.pypa.io: '*'
 
+dependencies:
+  pkgx.sh: ^1
+
 build:
   dependencies:
-    python.org: '>=3.7<3.12'
+    python.org: '*'  # we want the latest python and should restock when it bumps
     crates.io/semverator: '*'
   script:
-    - python-venv.sh {{prefix}}/bin/pipenv
+    - bkpyvenv stage {{prefix}} {{version}}
+    - ${{prefix}}/venv/bin/pip install .
+    - bkpyvenv seal {{prefix}} pipenv
 
     # create exec scripts for pipenv so it can auto install and use the pythons it wants
     - working-directory:
@@ -28,19 +29,10 @@ build:
         while semverator lt $v {{deps.python.org.version.marketing}}; do
           v=$(semverator bump $v minor | cut -d. -f1,2)
           echo '#!/bin/sh' > python$v
-          echo "exec tea python~$v \"\$@\"" >> python$v
+          echo "exec pkgx python~$v \"\$@\"" >> python$v
           chmod +x python$v
         done
 
-    # so the venv for ourselves works without adding a specific python to
-    # our runtime dependencies
-    - working-directory:
-        ${{prefix}}/bin
-      run: |
-        echo '#!/bin/sh' > python
-        echo "exec tea python~{{ deps.python.org.version.marketing }} \"\$@\"" >> python
-        chmod +x python
-
 runtime:
   env:
     PIPENV_IGNORE_VIRTUALENVS: 1