Wire workflow tests to pixi-managed R environment

.gitignore

@@ -4,3 +4,4 @@
 **/.flattened-pom.xml
 */*.jar
 **/CHANGELOG.md
+**/.pixi/

workflow-tests/pixi.toml

@@ -0,0 +1,17 @@
+[workspace]
+channels = ["conda-forge"]
+platforms = ["linux-64", "win-64", "osx-64", "osx-arm64"]
+
+[dependencies]
+r-base = ">=4.3,<5"
+"r-data.table" = "*"
+r-ggplot2 = "*"
+r-pmml = "*"
+r-rserve = "*"
+
+# Cairo is only required on macOS for bitmap graphics devices (png, bmp, etc.)
+[target.osx-64.dependencies]
+r-cairo = "*"
+
+[target.osx-arm64.dependencies]
+r-cairo = "*"

workflow-tests/preferences-Linux.epf

@@ -2,3 +2,4 @@
 \!/=
 file_export_version=3.0
 /instance/org.knime.conda/condaDirectoryPath=/home/jenkins/miniconda3
+/instance/org.knime.ext.r.bin/knime.r.home=<placeholder_for_r_home>

workflow-tests/preferences-MacOSX.epf

@@ -2,3 +2,4 @@
 \!/=
 file_export_version=3.0
 /instance/org.knime.conda/condaDirectoryPath=/Users/jenkins/miniconda3
+/instance/org.knime.ext.r.bin/knime.r.home=<placeholder_for_r_home>

workflow-tests/preferences-Windows.epf

@@ -2,3 +2,4 @@
 \!/=
 file_export_version=3.0
 /instance/org.knime.conda/condaDirectoryPath=C:\\Users\\jenkins\\Miniconda3
+/instance/org.knime.ext.r.bin/knime.r.home=<placeholder_for_r_home>

workflow-tests/setup-Linux.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Set up the pixi-managed R environment for workflow tests
+
+echo "Setting up pixi R environment..."
+cd "${WORKSPACE}/workflow-tests"
+pixi install
+
+# The pixi default environment prefix
+R_HOME="${WORKSPACE}/workflow-tests/.pixi/envs/default/lib/R"
+echo "R_HOME: ${R_HOME}"
+
+# Write the R home into the preferences file
+sedi "s|<placeholder_for_r_home>|${R_HOME}|g" "${WORKSPACE}/workflow-tests/preferences-Linux.epf"
+cat "${WORKSPACE}/workflow-tests/preferences-Linux.epf"

workflow-tests/setup-MacOSX.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Set up the pixi-managed R environment for workflow tests
+
+echo "Setting up pixi R environment..."
+cd "${WORKSPACE}/workflow-tests"
+pixi install
+
+# The pixi default environment prefix
+R_HOME="${WORKSPACE}/workflow-tests/.pixi/envs/default/lib/R"
+echo "R_HOME: ${R_HOME}"
+
+# Write the R home into the preferences file
+sedi "s|<placeholder_for_r_home>|${R_HOME}|g" "${WORKSPACE}/workflow-tests/preferences-MacOSX.epf"
+cat "${WORKSPACE}/workflow-tests/preferences-MacOSX.epf"

workflow-tests/setup-Windows.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Set up the pixi-managed R environment for workflow tests
+
+echo "Setting up pixi R environment..."
+cd "${WORKSPACE}/workflow-tests"
+pixi install
+
+# The pixi default environment prefix (backslash separators for Windows paths)
+R_HOME="${WORKSPACE}\\workflow-tests\\.pixi\\envs\\default\\lib\\R"
+echo "R_HOME: ${R_HOME}"
+
+# Write the R home into the preferences file (escape backslashes for EPF/Java-properties format)
+sedi "s|<placeholder_for_r_home>|${R_HOME//\\/\\\\\\\\}|g" "${WORKSPACE}/workflow-tests/preferences-Windows.epf"
+cat "${WORKSPACE}/workflow-tests/preferences-Windows.epf"