Merge install_local_cset into build_conda so environment is setup in a single cylc task

cset-workflow/app/build_conda/bin/build_conda_env.sh

@@ -1,76 +1,106 @@
 #! /bin/bash
 # This script builds the conda environment used by most subsequent tasks.
 set -euo pipefail
-IFS="$(printf '\n\t')"
 
 # Use default location if CONDA_VENV_LOCATION is not specified.
 if [[ -z "$CONDA_VENV_LOCATION" ]]; then
   CONDA_VENV_LOCATION="${CYLC_WORKFLOW_SHARE_DIR}/cset_conda_env"
 fi
 
-# Decide if the environment needs building.
-if [[ "$CONDA_VENV_CREATE" == True ]]; then
-  true
-elif [[ "$CONDA_VENV_CREATE" == False ]]; then
-  echo "Conda environment building disabled"
-  exit 0
-else
-  echo "Invalid value for CONDA_VENV_CREATE: $CONDA_VENV_CREATE"
-  exit 1
-fi
 
-# Find environment definition file, abort if not found.
-env_lock_file="${CYLC_WORKFLOW_RUN_DIR}/requirements/locks/py312-lock-linux-64.txt"
-if [[ -f "$env_lock_file" ]]; then
-  echo "Using environment file $env_lock_file"
-else
-  echo "Environment file $env_lock_file not found"
-  exit 1
-fi
+should_build_conda_env() {
+  # Decide if the environment needs building.
+  if [[ "$CONDA_VENV_CREATE" == True ]]
+  then
+    true
+  elif [[ "$CONDA_VENV_CREATE" == False ]]
+  then
+    echo "Conda environment building disabled"
+    return 1
+  else
+    >&2 echo "Invalid value for CONDA_VENV_CREATE: $CONDA_VENV_CREATE"
+    exit 1
+  fi
 
-if [[ -f "${CONDA_VENV_LOCATION}/cset_env_hash" ]]; then
-  if [[ "$(cat "${CONDA_VENV_LOCATION}/cset_env_hash")" == "$(sha256sum "$env_lock_file" | head -c 64)" ]]
+  # Find environment definition file, abort if not found.
+  env_lock_file="${CYLC_WORKFLOW_RUN_DIR}/requirements/locks/py312-lock-linux-64.txt"
+  if [[ -f "$env_lock_file" ]]
   then
-    echo "Conda environment already exist, no build required"
-    exit 0
+    echo "Using environment file $env_lock_file"
   else
-    echo "Conda environment is out of date, building afresh"
+    >&2 echo "Environment file $env_lock_file not found"
+    exit 1
   fi
-else
-  echo "Conda environment does not exist, building afresh"
-fi
 
-# Source modules/paths required to build the environment.
-if [[ $CSET_ENV_USE_MODULES == True ]]; then
-  if [[ $MODULES_LIST ]]; then
-    IFS_SAVE=$IFS
-    IFS=' '
-    if [[ $MODULES_PURGE == True ]]; then
-      module purge
+  if [[ -f "${CONDA_VENV_LOCATION}/cset_env_hash" ]]
+  then
+    if [[ "$(cat "${CONDA_VENV_LOCATION}/cset_env_hash")" == "$(sha256sum "$env_lock_file" | head -c 64)" ]]
+    then
+      echo "Conda environment already exist, no build required"
+      return 1
+    else
+      echo "Conda environment is out of date, building afresh"
     fi
-    for build_module in $MODULES_LIST; do
-      # Loads the same modules that the other tasks uses, although it only needs
-      # a module to make conda available. This is to simplify the logic.
-      module load "$build_module"
-    done
-    IFS="$IFS_SAVE"
-    echo "sourcing conda via modules:"
-    module list
+  else
+    echo "Conda environment does not exist, building afresh"
   fi
-fi
-if [[ -d "$CONDA_PATH" ]]; then
-  echo "Sourcing conda on path: ${CONDA_PATH}"
-else
-  CONDA_PATH=""
-fi
 
-# Remove old conda environment.
-rm -rf -- "$CONDA_VENV_LOCATION"
+  return 0
+}
 
-# Build conda environment.
-echo "Building conda with:"
-echo "${CONDA_PATH}conda create -p $CONDA_VENV_LOCATION --file $env_lock_file --yes --force --quiet"
-"${CONDA_PATH}conda" create -p "$CONDA_VENV_LOCATION" --file "$env_lock_file" --yes --force --quiet
 
-# Create hash file for next run.
-sha256sum "$env_lock_file"  | head -c 64 > "${CONDA_VENV_LOCATION}/cset_env_hash"
+build_conda_env() {
+  # Source modules/paths required to build the environment.
+  if [[ $CSET_ENV_USE_MODULES == True ]]
+  then
+    if [[ $MODULES_LIST ]]
+    then
+      if [[ $MODULES_PURGE == True ]]
+      then
+        module purge
+      fi
+      for build_module in $MODULES_LIST
+      do
+        # Loads the same modules that the other tasks uses, although it only needs
+        # a module to make conda available. This is to simplify the logic.
+        module load "$build_module"
+      done
+      echo "Sourcing conda via modules:"
+      module list
+    fi
+  fi
+
+  if [[ -d "$CONDA_PATH" ]]
+  then
+    echo "Sourcing conda from: ${CONDA_PATH}"
+  else
+    CONDA_PATH=""
+  fi
+
+  # Remove old conda environment.
+  echo "Removing conda environment with:"
+  echo "${CONDA_PATH}conda remove -p $CONDA_VENV_LOCATION --all --yes --quiet"
+  if ! "${CONDA_PATH}conda" remove -p "$CONDA_VENV_LOCATION" --all --yes --quiet
+  then
+    >&2 echo "Failed to conda remove old environment, trying to remove manually."
+    rm -rf -- "$CONDA_VENV_LOCATION"
+  fi
+
+  # Build conda environment.
+  echo "Building conda with:"
+  echo "${CONDA_PATH}conda create -p $CONDA_VENV_LOCATION --file $env_lock_file --yes --force --quiet"
+  "${CONDA_PATH}conda" create -p "$CONDA_VENV_LOCATION" --file "$env_lock_file" --yes --force --quiet
+
+  # Create hash file for next run.
+  sha256sum "$env_lock_file"  | head -c 64 > "${CONDA_VENV_LOCATION}/cset_env_hash"
+}
+
+
+if should_build_conda_env
+then
+  build_conda_env
+fi
+
+# Install development version of CSET into the conda environment if needed, and
+# validate CSET is installed. This needs to run inside the conda environment.
+app_env_wrapper install-local-cset.sh

cset-workflow/app/build_conda/bin/install-local-cset.sh

@@ -0,0 +1,29 @@
+#! /bin/bash
+
+# Install development version of CSET into the conda environment if needed.
+
+set -euo pipefail
+
+if [[ $CSET_ENV_USE_LOCAL_CSET = "True" ]]
+then
+    cset_install_path="$(mktemp -d)"
+    cset_source_path="${CSET_LOCAL_CSET_PATH}"
+    echo "Using local CSET from ${cset_source_path}"
+
+    # Directly install wheel files, or copy source folder.
+    if [[ $cset_source_path == *.whl ]]
+    then
+        echo "Wheel file, installing directly."
+        cset_install_path="${cset_source_path}"
+    else
+        # Copy project to temporary location to avoid permissions issues. We
+        # don't want to copy all hidden files, as they can contain large conda
+        # environments, but we do want the .git directory.
+        cp -r "${cset_source_path}"/* "${cset_source_path}"/.git "${cset_install_path}"
+    fi
+
+    # Build and install into python environment.
+    pip install --verbose --progress-bar off --no-deps -- "${cset_install_path}"
+fi
+
+echo "Using CSET version: $(cset --version)"

cset-workflow/flow.cylc

@@ -15,9 +15,7 @@ URL = https://metoffice.github.io/CSET
     [[graph]]
     # Only runs on the first cycle.
     R1/^ = """
-    build_conda => install_website_skeleton
-    build_conda => install_local_cset
-    install_website_skeleton & install_local_cset => FETCH_DATA
+    build_conda & install_website_skeleton => FETCH_DATA
     """
 
     # Only runs on the final cycle.
@@ -112,15 +110,11 @@ URL = https://metoffice.github.io/CSET
     platform = localhost
 
     [[build_conda]]
-    # Create the conda environment if it does not yet exist.
+    # Create the conda environment if it does not yet exist, possibly installing
+    # CSET from source.
     execution time limit = PT30M
         [[[environment]]]
         CONDA_VENV_CREATE = {{CONDA_VENV_CREATE}}
-
-    [[install_local_cset]]
-    # Install CSET from source.
-    execution time limit = PT10M
-        [[[environment]]]
         CSET_ENV_USE_LOCAL_CSET = {{CSET_ENV_USE_LOCAL_CSET}}
         {% if CSET_ENV_USE_LOCAL_CSET %}
         CSET_LOCAL_CSET_PATH = {{CSET_LOCAL_CSET_PATH}}