[taler-build-common] 39/50: configure: reduce tests to python3 + python3.7 + python3.8; add check for python3

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ng0 pushed a commit to branch master
in repository build-common.

commit 6cb9711744d5bc32c4e8ebe6db53500826891f4c
Author: ng0 <address@hidden>
AuthorDate: Fri Oct 18 15:59:12 2019 +0000

    configure: reduce tests to python3 + python3.7 + python3.8; add check for 
python3
---
 configure | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/configure b/configure
index f74d338..c50a146 100755
--- a/configure
+++ b/configure
@@ -42,19 +42,25 @@ existence()
 # executable name because there is a PEP which
 # defines the executable to be like this.
 if existence python3; then
-    python="python3"
-elif existence python3.1; then
-    python="python3.1"
-elif existence python3.2; then
-    python="python3.2"
-elif existence python3.3; then
-    python="python3.3"
-elif existence python3.4; then
-    python="python3.4"
-elif existence python3.5; then
-    python="python3.5"
-elif existence python3.6; then
-    python="python3.6"
+    if test ! -z "`python3 --version | awk '$2 ~ /3.7/ { print }'`"; then
+        python="python3"
+    else
+        echo "*** At least python 3.7 is required for the buildsystem"
+        exit 1
+    fi
+fi
+# elif existence python3.1; then
+#     python="python3.1"
+# elif existence python3.2; then
+#     python="python3.2"
+# elif existence python3.3; then
+#     python="python3.3"
+# elif existence python3.4; then
+#     python="python3.4"
+# elif existence python3.5; then
+#     python="python3.5"
+# elif existence python3.6; then
+#     python="python3.6"
 elif existence python3.7; then
     python="python3.7"
 elif existence python3.8; then

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