[PATCH v5 07/12] sbuild: support of shell exports from dpkg_runbuild_prepend

[Uladzimir Bely <ubely@ilbers.de>]

Many of recipes often use shell exports done in dpkg_run_prepend, so that
this changed environment is used during build.

While sbuild is performed in isolated environment, we need a way to
pass these variables to it. This is done by storing environment before
dpkg_runbuild (after prepare_build) and finding just before the actual
build what was changed or added.

Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
---
 meta/classes/dpkg.bbclass | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/meta/classes/dpkg.bbclass b/meta/classes/dpkg.bbclass
index 66db7ec5..c252e9b3 100644
--- a/meta/classes/dpkg.bbclass
+++ b/meta/classes/dpkg.bbclass
@@ -29,12 +29,30 @@ do_install_builddeps[lockfiles] += "${REPO_ISAR_DIR}/isar.lock"
 
 addtask devshell after do_install_builddeps
 
+DPKG_PREBUILD_ENV_FILE="${WORKDIR}/dpkg_prebuild.env"
+
+do_prepare_build_append() {
+    env > ${DPKG_PREBUILD_ENV_FILE}
+}
+
 # Build package from sources using build script
 dpkg_runbuild() {
     E="${@ isar_export_proxies(d)}"
     E="${@ isar_export_ccache(d)}"
     export PARALLEL_MAKE="${PARALLEL_MAKE}"
 
+    env | while read -r line; do
+        # Filter the same lines
+        grep -q "^${line}" ${DPKG_PREBUILD_ENV_FILE} && continue
+        # Filter some standard variables
+        echo ${line} | grep -q "^HOME=" && continue
+        echo ${line} | grep -q "^PWD=" && continue
+
+        var=$(echo "${line}" | cut -d '=' -f1)
+        value=$(echo "${line}" | cut -d '=' -f2-)
+        sbuild_export $var "$value"
+    done
+
     profiles=$(grep "DEB_BUILD_PROFILES" ${SBUILD_CONFIG} | tail -n1 | cut -d "'" -f 4)
     if [ ${ISAR_CROSS_COMPILE} -eq 1 ]; then
         profiles="${profiles} cross nocheck"
-- 
2.20.1