Check for non-zero string length instead of value

MakisH · MakisH · commit dee953b1113c · 2025-11-18T11:14:43.000+01:00
diff --git a/changelog-entries/680.md b/changelog-entries/680.md
@@ -1 +1 @@
-- Added an option to skip the setup of a Python venv in the run.sh scripts of Python-related tutorials [#680](https://github.com/precice/tutorials/pull/680)
+- Added the `PRECICE_TUTORIALS_NO_VENV` environment variable to skip the setup of a Python venv in the run.sh scripts of Python-related tutorials [#680](https://github.com/precice/tutorials/pull/680)
diff --git a/channel-transport-reaction/chemical-fenics/run.sh b/channel-transport-reaction/chemical-fenics/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-package .venv
     . .venv/bin/activate
diff --git a/channel-transport-reaction/fluid-fenics/run.sh b/channel-transport-reaction/fluid-fenics/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-package .venv
     . .venv/bin/activate
diff --git a/channel-transport/fluid-nutils/run.sh b/channel-transport/fluid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/channel-transport/transport-nutils/run.sh b/channel-transport/transport-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/elastic-tube-1d/fluid-python/run.sh b/elastic-tube-1d/fluid-python/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/elastic-tube-1d/solid-python/run.sh b/elastic-tube-1d/solid-python/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/elastic-tube-3d/solid-fenics/run.sh b/elastic-tube-3d/solid-fenics/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-package .venv
     . .venv/bin/activate
diff --git a/flow-around-controlled-moving-cylinder/controller-fmi/run.sh b/flow-around-controlled-moving-cylinder/controller-fmi/run.sh
@@ -15,7 +15,7 @@ if [ ! -f PIDcontroller.fmu ]; then
   cd ../../
 fi
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/flow-around-controlled-moving-cylinder/solid-python/run.sh b/flow-around-controlled-moving-cylinder/solid-python/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/flow-over-heated-plate/fluid-su2/run.sh b/flow-over-heated-plate/fluid-su2/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-package .venv
     . .venv/bin/activate
diff --git a/flow-over-heated-plate/solid-dunefem/run.sh b/flow-over-heated-plate/solid-dunefem/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/flow-over-heated-plate/solid-fenics/run.sh b/flow-over-heated-plate/solid-fenics/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-package .venv
     . .venv/bin/activate
diff --git a/flow-over-heated-plate/solid-nutils/run.sh b/flow-over-heated-plate/solid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/oscillator/mass-left-fmi/run.sh b/oscillator/mass-left-fmi/run.sh
@@ -16,7 +16,7 @@ if [ ! -f ../solver-fmi/Oscillator.fmu ]; then
   cd ../../../mass-left-fmi
 fi
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/oscillator/mass-right-fmi/run.sh b/oscillator/mass-right-fmi/run.sh
@@ -16,7 +16,7 @@ if [ ! -f ../solver-fmi/Oscillator.fmu ]; then
   cd ../../../mass-right-fmi
 fi
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/partitioned-heat-conduction-complex/dirichlet-fenics/run.sh b/partitioned-heat-conduction-complex/dirichlet-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/partitioned-heat-conduction-complex/neumann-fenics/run.sh b/partitioned-heat-conduction-complex/neumann-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/partitioned-heat-conduction-direct/dirichlet-nutils/run.sh b/partitioned-heat-conduction-direct/dirichlet-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/partitioned-heat-conduction-direct/neumann-nutils/run.sh b/partitioned-heat-conduction-direct/neumann-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/partitioned-heat-conduction-overlap/left-fenics/run.sh b/partitioned-heat-conduction-overlap/left-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/partitioned-heat-conduction-overlap/right-fenics/run.sh b/partitioned-heat-conduction-overlap/right-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/partitioned-heat-conduction/dirichlet-fenics/run.sh b/partitioned-heat-conduction/dirichlet-fenics/run.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e -u
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
diff --git a/partitioned-heat-conduction/dirichlet-nutils/run.sh b/partitioned-heat-conduction/dirichlet-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/partitioned-heat-conduction/neumann-fenics/run.sh b/partitioned-heat-conduction/neumann-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/partitioned-heat-conduction/neumann-nutils/run.sh b/partitioned-heat-conduction/neumann-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/perpendicular-flap/fluid-fake/run.sh b/perpendicular-flap/fluid-fake/run.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env sh
 set -e -u
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/perpendicular-flap/fluid-nutils/run.sh b/perpendicular-flap/fluid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/perpendicular-flap/fluid-su2/run.sh b/perpendicular-flap/fluid-su2/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r requirements.txt && pip freeze > pip-installed-packages.log
diff --git a/perpendicular-flap/profiling.db b/perpendicular-flap/profiling.db
diff --git a/perpendicular-flap/solid-fake/run.sh b/perpendicular-flap/solid-fake/run.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env sh
 set -e -u
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/perpendicular-flap/solid-fenics/run.sh b/perpendicular-flap/solid-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r requirements.txt && pip freeze > pip-installed-packages.log
diff --git a/perpendicular-flap/solid-nutils/run.sh b/perpendicular-flap/solid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/resonant-circuit/capacitor-python/run.sh b/resonant-circuit/capacitor-python/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/resonant-circuit/coil-python/run.sh b/resonant-circuit/coil-python/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/turek-hron-fsi3/fluid-nutils/run.sh b/turek-hron-fsi3/fluid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/turek-hron-fsi3/solid-nutils/run.sh b/turek-hron-fsi3/solid-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/two-scale-heat-conduction/macro-nutils/run.sh b/two-scale-heat-conduction/macro-nutils/run.sh
@@ -4,7 +4,7 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/two-scale-heat-conduction/micro-nutils/run.sh b/two-scale-heat-conduction/micro-nutils/run.sh
@@ -6,7 +6,7 @@ exec > >(tee --append "$LOGFILE") 2>&1
 
 usage() { echo "Usage: cmd [-s] [-p n]" 1>&2; exit 1; }
 
-if [ "${PRECICE_TUTORIALS_VENV:-true}" = true ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
     python3 -m venv .venv
     . .venv/bin/activate
diff --git a/volume-coupled-diffusion/drain-fenics/run.sh b/volume-coupled-diffusion/drain-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
diff --git a/volume-coupled-diffusion/source-fenics/run.sh b/volume-coupled-diffusion/source-fenics/run.sh
@@ -4,9 +4,8 @@ set -e -u
 . ../../tools/log.sh
 exec > >(tee --append "$LOGFILE") 2>&1
 
-if [ $# -eq 0 ]
+if [ -z "${PRECICE_TUTORIALS_NO_VENV:-}" ]
 then
-    echo "Installing dependencies in a Python virtual environment"
     python3 -m venv --system-site-packages .venv
     . .venv/bin/activate
     pip install -r ../solver-fenics/requirements.txt
