From b11ef9480dd90625a2b3b60bbb06f3fabd606e14 Mon Sep 17 00:00:00 2001
From: "Brian W. Hart" <hartb@us.ibm.com>
Date: Thu, 11 Jun 2020 19:24:43 +0000
Subject: [PATCH] common build: add callout to feedstock pre-build script

Allow feedstocks to provide a script to be called just before
"conda build". This allows feedstocks to use the common build
scripts but further customize the build environment if needed.

The script must be named "build_steps_hook.sh" and must reside
in the feedstock's top-level directory (not the "recipe/"
directory, to avoid confusion with any scripts that "conda build"
will later run.)

The script is run with "bash ..." so should be a bash script,
but need not have file execute permissions..
---
 conda-recipes/build_scripts/build_steps.sh | 8 ++++++++
 conda-recipes/build_scripts/local_build.sh | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/conda-recipes/build_scripts/build_steps.sh b/conda-recipes/build_scripts/build_steps.sh
index e4c50dc..80fb81b 100644
--- a/conda-recipes/build_scripts/build_steps.sh
+++ b/conda-recipes/build_scripts/build_steps.sh
@@ -42,6 +42,14 @@ setup_conda_rc "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 # make the build number clobber
 make_build_number "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 
+# Execute feedstock pre-build steps if they exist
+FEEDSTOCK_HOOK_SCRIPT="${FEEDSTOCK_ROOT}/build_steps_hook.sh"
+if [ -f "${FEEDSTOCK_HOOK_SCRIPT}" ]
+then
+    echo "Executing ${FEEDSTOCK_HOOK_SCRIPT}..."
+    bash "${FEEDSTOCK_HOOK_SCRIPT}"
+fi
+
 conda build "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
     --clobber-file "${CI_SUPPORT}/clobber_${CONFIG}.yaml"
 
diff --git a/conda-recipes/build_scripts/local_build.sh b/conda-recipes/build_scripts/local_build.sh
index 14b3ed8..a086c2a 100644
--- a/conda-recipes/build_scripts/local_build.sh
+++ b/conda-recipes/build_scripts/local_build.sh
@@ -39,6 +39,14 @@ setup_conda_rc "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 # make the build number clobber
 make_build_number "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 
+# Execute feedstock pre-build steps if they exist
+FEEDSTOCK_HOOK_SCRIPT="${FEEDSTOCK_ROOT}/build_steps_hook.sh"
+if [ -f "${FEEDSTOCK_HOOK_SCRIPT}" ]
+then
+    echo "Executing ${FEEDSTOCK_HOOK_SCRIPT}..."
+    bash "${FEEDSTOCK_HOOK_SCRIPT}"
+fi
+
 conda build "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
     --clobber-file "${CI_SUPPORT}/clobber_${CONFIG}.yaml"