Install MacPorts under an arbitrary prefix

.github/workflows/continuous-integration.yaml

@@ -25,6 +25,10 @@ jobs:
         os: ['macos-12', 'macos-13', 'macos-14']
         version: ['2.9.3']
         prefix: ['/opt/local']
+        include:
+          - os: 'macos-14'
+            version: '2.9.3'
+            prefix: '/opt/package'
     runs-on: '${{ matrix.os }}'
     name: 'Install MacPorts'
     needs: 'run-testsuite'
@@ -43,4 +47,5 @@ jobs:
       - name: 'Validate transmitted MacPorts version'
         run: >-
           test "${{ steps.macports.outputs.version }}" = '${{ matrix.version }}'
+      - run: ${{ matrix.prefix }}/bin/port version
       - run: port version

action.yaml

@@ -92,3 +92,6 @@ runs:
         TOPLEVELDIR: ${{ github.action_path }}
       run: |
         ${{ github.action_path }}/install_macports
+      env:
+        macports_prefix: ${{ steps.configure-macports.outputs.prefix }}
+        macports_version: ${{ steps.configure-macports.outputs.version }}

configure_macports

@@ -45,7 +45,7 @@ experimental()
 
 cache_key()
 {
-    openssl ripemd160 "${macports_prefix}/etc/gha-install-macports.yaml"\
+    openssl ripemd160 "${macports_prefix}/etc/setup-macports.yaml"\
 	| awk -v "macos=${macos}" '{print(macos "-" $2)}'
 }
 
@@ -101,8 +101,8 @@ main()
     esac
 
     if [ -f "${parameterfile}" -a -r "${parameterfile}" ]; then
-	version=$(yq ".version // \"${macports_version}\"" < "${parameterfile}")
-	prefix=$(yq ".prefix // \"${macports_prefix}\"" < "${parameterfile}")
+	macports_version=$(yq ".version // \"${macports_version}\"" < "${parameterfile}")
+	macports_prefix=$(yq ".prefix // \"${macports_prefix}\"" < "${parameterfile}")
     fi
 
     if [ "${action}" = 'experimental' ]; then
@@ -112,14 +112,14 @@ main()
 
     setup_path
     sudo install -d -o $(id -u -n) -g $(id -g -n) -m 755 "${macports_prefix}"
-    write_configuration "${parameterfile}" "${macports_prefix}/etc/gha-install-macports.yaml"
-    write_variants "${macports_prefix}/etc/gha-install-macports.yaml"
-    write_sources "${macports_prefix}/etc/gha-install-macports.yaml"
+    write_configuration "${parameterfile}" "${macports_prefix}/etc/setup-macports.yaml"
+    write_variants "${macports_prefix}/etc/setup-macports.yaml"
+    write_sources "${macports_prefix}/etc/setup-macports.yaml"
 
     if [ "${GITHUB_ACTIONS}" = 'true' ]; then
 	{
 	    printf 'prefix=%s\n' "${macports_prefix}"
-	    printf 'parameters=%s\n' "${macports_prefix}/etc/gha-install-macports.yaml"
+	    printf 'parameters=%s\n' "${macports_prefix}/etc/setup-macports.yaml"
 	    printf 'cache-key=%sn\n' "$(cache_key)"
             printf 'package=%s\n' "$(make_package)"
             printf 'version=%s\n' "${macports_version}"

install_macports

@@ -162,6 +162,23 @@ fetch_and_install_package()
     sudo chown -R $(id -u -n):$(id -g -n) "${macports_prefix}"
 }
 
+install_from_source()
+{
+    local srcdir
+    srcdir='/opt/local/src'
+    sudo install -d -o $(id -u -n) -g $(id -g -n) -m 755 "${srcdir}"
+    (
+	cd "${srcdir}"
+	git clone https://github.com/macports/macports-base.git
+	cd macports-base
+	git checkout "v${macports_version}"
+	./configure --enable-readline --prefix="${macports_prefix}"
+	make
+	sudo make install
+    )
+    rm -Rf "${srcdir}"
+}
+
 install_ports()
 {
     ports_document "$1" | xargs -J '%' sudo port install '%'
@@ -208,8 +225,13 @@ main()
 	'Configuration Summary'\
 	configuration_summary
 
-    fetch_and_install_package "$(make_package)"
-    install_ports "${macports_prefix}/etc/gha-install-macports.yaml"
+    if [ "${macports_prefix}" = '/opt/local' ]; then
+	fetch_and_install_package "$(make_package)"
+    else
+	install_from_source
+    fi
+
+    install_ports "${macports_prefix}/etc/setup-macports.yaml"
 }
 
 main "$@"