switch actions to pip-based install

.github/actions/build-nominatim/action.yml

@@ -1,18 +1,10 @@
 name: 'Build Nominatim'
 
 inputs:
-    flavour:
-        description: 'Version of Ubuntu to install on'
+    dependencies:
+        description: 'Where to install dependencies from (pip/apt)'
         required: false
-        default: 'ubuntu-20'
-    cmake-args:
-        description: 'Additional options to hand to cmake'
-        required: false
-        default: ''
-    lua:
-        description: 'Version of Lua to use'
-        required: false
-        default: '5.3'
+        default: 'pip'
 
 runs:
     using: "composite"
@@ -23,30 +15,30 @@ runs:
             sudo rm -rf /opt/hostedtoolcache/go /opt/hostedtoolcache/CodeQL /usr/lib/jvm /usr/local/share/chromium /usr/local/lib/android
             df -h
           shell: bash
-        - name: Install${{ matrix.flavour }} prerequisites
+        - name: Install general prerequisites
           run: |
-            sudo apt-get install -y -qq libboost-system-dev libboost-filesystem-dev libexpat1-dev zlib1g-dev libbz2-dev libpq-dev libproj-dev libicu-dev liblua${LUA_VERSION}-dev lua${LUA_VERSION} lua-dkjson nlohmann-json3-dev libspatialite-dev libsqlite3-mod-spatialite
-            if [ "$FLAVOUR" == "oldstuff" ]; then
-                pip3 install MarkupSafe==2.0.1 python-dotenv jinja2==2.8 psutil==5.4.2 pyicu==2.9 osmium PyYAML==5.1 sqlalchemy==1.4.31 psycopg==3.1.7 datrie asyncpg aiosqlite
-            else
-                sudo apt-get install -y -qq python3-icu python3-datrie python3-pyosmium python3-jinja2 python3-psutil python3-dotenv python3-yaml
-                pip3 install sqlalchemy psycopg aiosqlite
-            fi
+            sudo apt-get install -y -qq libspatialite-dev libsqlite3-mod-spatialite libicu-dev virtualenv python3-dev osm2pgsql
           shell: bash
-          env:
-            FLAVOUR: ${{ inputs.flavour }}
-            CMAKE_ARGS: ${{ inputs.cmake-args }}
-            LUA_VERSION: ${{ inputs.lua }}
 
-        - name: Configure
-          run: mkdir build && cd build && cmake $CMAKE_ARGS ../Nominatim
-          shell: bash
-          env:
-            CMAKE_ARGS: ${{ inputs.cmake-args }}
-
-        - name: Build
+        - name: Install prerequisites from apt
           run: |
-              make -j2 all
-              sudo make install
+            sudo apt-get install -y -qq python3-icu python3-datrie python3-jinja2 python3-psutil python3-dotenv python3-yaml python3-sqlalchemy python3-psycopg python3-asyncpg
+          shell: bash
+          if: inputs.dependencies == 'apt'
+
+        - name: Setup virtual environment (for pip)
+          run: |
+            virtualenv venv
+            ./venv/bin/pip install -U pip
+          shell: bash
+          if: inputs.dependencies == 'pip'
+
+        - name: Setup virtual environment (for apt)
+          run: |
+            virtualenv venv --system-site-packages
+          shell: bash
+          if: inputs.dependencies == 'apt'
+
+        - name: Build nominatim
+          run: ./venv/bin/pip install Nominatim/packaging/nominatim-{api,db}
           shell: bash
-          working-directory: build

.github/actions/setup-postgresql/action.yml

@@ -4,9 +4,6 @@ inputs:
     postgresql-version:
         description: 'Version of PostgreSQL to install'
         required: true
-    postgis-version:
-        description: 'Version of Postgis to install'
-        required: true
 
 runs:
     using: "composite"
@@ -24,11 +21,10 @@ runs:
 
         - name: Install PostgreSQL
           run: |
-              sudo apt-get install -y -qq --no-install-suggests --no-install-recommends postgresql-client-${PGVER} postgresql-${PGVER}-postgis-${POSTGISVER} postgresql-${PGVER}-postgis-${POSTGISVER}-scripts postgresql-contrib-${PGVER} postgresql-${PGVER}
+              sudo apt-get install -y -qq --no-install-suggests --no-install-recommends postgresql-client-${PGVER} postgresql-${PGVER}-postgis-3 postgresql-${PGVER}-postgis-3-scripts postgresql-contrib-${PGVER} postgresql-${PGVER}
           shell: bash
           env:
               PGVER: ${{ inputs.postgresql-version }}
-              POSTGISVER: ${{ inputs.postgis-version }}
 
         - name: Adapt postgresql configuration
           run: |