Use Agg backend as default in headless environments. (#352)

MichaelGrupp · Dec 1, 2020 · fbb6541 · fbb6541
1 parent f641e74
commit fbb6541
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Showing 3 changed files with 6 additions and 2 deletions.
diff --git a/Dockerfile.rosnoetic b/Dockerfile.rosnoetic
@@ -30,7 +30,7 @@ RUN container-local/.ci/debian_install_pip3.sh
 
 # Build and install.
 RUN pip3 install /container-local --upgrade --no-binary evo
-RUN evo_config set plot_backend Agg
+RUN evo_config show --brief --no_color
 
 # Run tests.
 RUN pip3 install pytest --upgrade

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -67,7 +67,7 @@ jobs:
   - script: |
       python -m pip install --upgrade pip
       pip install . --no-binary evo
-      evo_config set plot_backend Agg
+      evo_config show --brief --no_color
     displayName: 'Install and configure package and dependencies'
 
   - script: |

diff --git a/evo/tools/settings_template.py b/evo/tools/settings_template.py
@@ -18,10 +18,14 @@
 along with evo.  If not, see <http://www.gnu.org/licenses/>.
 """
 
+import os
 import pkgutil
 
 
 def get_default_plot_backend() -> str:
+    if os.name == "posix" and os.getenv("DISPLAY", default="") == "":
+        return "Agg"
+
     backends = {"PyQt5": "Qt5Agg"}
     for pkg in backends:
         if pkgutil.find_loader(pkg) is not None: