Switch to python3.7 (integration-tests incomplete), continue using python2.7 for gnunet-qr with an incredible annoying workaround for autotools inability to deal with 2 major python versions at the same time

Signed-off-by: ng0 <ng0@n0.is>

1 files changed, 40 insertions, 0 deletions

diff --git a/bootstrap b/bootstrap
index 3155cff61..8fb025599 100755
--- a/bootstrap
+++ b/bootstrap
@@ -19,3 +19,43 @@ else
     echo "*** No libtoolize (libtool) or libtool found, please install it ***" >&2;
     exit 1
 fi
+
+# autotools is being incredible stupid with multiple python versions
+# what we do here is check for a functional python 2.7 which reports
+# back to be a real python 2.7, then later on sed the location in
+# the only python 2.7 file we keep around
+# the rest of the build system can then be happy detecting 3.7 or
+# higher
+# this checks a range of names which is as annoying as what autotools
+# is doing
+# Since everything we could try is do too much work, we will assume
+# that python2 OR python2.7 are the names for python 2.7.
+# If your system diverges, please sed it accordingly!
+echo "save python 2.7 location into src/util/python27_location"
+#if existence python2 || existence python2.7; then
+#       echo command -v
+python_version()
+{
+        "$1" -c "print(__import__('sys').version)" | grep -Z "2.7" | cut -c1-3
+}
+
+if existence python; then
+    if [ ! -z "${python_version} python" ]; then
+        loc1=$(command -v python)
+        echo "$loc1" >./src/util/python27_location
+    fi
+elif existence python2; then
+    if [ ! -z "${python_version} python2" ]; then
+        loc2=$(command -v python2)
+        echo "$loc2" >./src/util/python27_location
+    fi
+elif existence python2.7; then
+    if [ ! -z "${python_version} python2.7" ]; then
+        loc3=$(command -v python2.7)
+        echo "$loc3" >./src/util/python27_location
+    fi
+else
+    echo "*** No python 2.7 binary found, please install it" >&2
+    echo "*** for the optional gnunet-qr to work." >&2
+    echo "*** Make sure to install a matching python future module." >&2
+fi