tools: Factorize Python detection code

tools/common.sh

+VER=2
+if [ "$1" = -3 ]; then
+    VER=3
+    shift
+fi
+
+if [ -z "${PYTHON}" ]; then
+    which python >/dev/null 2>&1 && PYTHON=$(which python)
+    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
+    if [ $VER -eq 2 ]; then
+        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
+    else
+        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
+        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
+        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
+    fi
+fi

tools/local_install.sh

 #!/bin/sh
 set -e
 
-VER=2
-if [ "$1" = -3 ]; then
-    VER=3
-    shift
-fi
-
-if [ -z "${PYTHON}" ]; then
-    which python >/dev/null 2>&1 && PYTHON=$(which python)
-    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
-    if [ $VER -eq 2 ]; then
-        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
-    else
-        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
-        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
-        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
-    fi
-fi
+. "$(dirname $0)/common.sh"
 
 $PYTHON "$(dirname $0)/stale_pyc.py"
 

tools/local_run.sh

 #!/bin/sh
 set -e
 
-VER=2
-if [ "$1" = -3 ]; then
-    VER=3
-    shift
-fi
-
-if [ -z "${PYTHON}" ]; then
-    which python >/dev/null 2>&1 && PYTHON=$(which python)
-    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
-    if [ $VER -eq 2 ]; then
-        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
-    else
-        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
-        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
-        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
-    fi
-fi
+. "$(dirname $0)/common.sh"
 
 $PYTHON "$(dirname $0)/stale_pyc.py"
 

tools/make_man.sh

@@ -3,23 +3,7 @@
 # stop on failure
 set -e
 
-VER=2
-if [ "$1" = -3 ]; then
-    VER=3
-    shift
-fi
-
-if [ -z "${PYTHON}" ]; then
-    which python >/dev/null 2>&1 && PYTHON=$(which python)
-    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
-    if [ $VER -eq 2 ]; then
-        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
-    else
-        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
-        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
-        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
-    fi
-fi
+. "$(dirname $0)/common.sh"
 
 # Use C local to avoid local dates in headers
 export LANG=en_US.utf8

tools/run_tests.sh

@@ -10,12 +10,19 @@
 # stop on failure
 set -e
 
-VER=2
-if [ "$1" = -3 ]; then
-	VER=3
-	shift
+. "$(dirname $0)/common.sh"
+
+if [ -z "${PYTHON}" ]; then
+    echo "Python required"
+    exit 1
 fi
 
+if ! $PYTHON -c "import nose" 2>/dev/null; then
+    echo "python-nose required"
+    exit 1
+fi
+
+
 # path to sources
 WEBOOB_DIR=$(cd $(dirname $0)/.. && pwd -P)
 
@@ -61,30 +68,6 @@ else
     WEBOOB_CI_TARGET=""
 fi
 
-
-# find executables
-if [ -z "${PYTHON}" ]; then
-    which python >/dev/null 2>&1 && PYTHON=$(which python)
-    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
-    if [ $VER -eq 2 ]; then
-        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
-    else
-        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
-        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
-        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
-    fi
-fi
-
-if [ -z "${PYTHON}" ]; then
-    echo "Python required"
-    exit 1
-fi
-
-if ! $PYTHON -c "import nose" 2>/dev/null; then
-    echo "python-nose required"
-    exit 1
-fi
-
 # do not allow undefined variables anymore
 set -u
 if [ -f "${WEBOOB_BACKENDS}" ]; then

tools/weboob_lint.sh

@@ -3,23 +3,7 @@
 # stop on failure
 set -e
 
-VER=2
-if [ "$1" = -3 ]; then
-    VER=3
-    shift
-fi
-
-if [ -z "${PYTHON}" ]; then
-    which python >/dev/null 2>&1 && PYTHON=$(which python)
-    which python$VER >/dev/null 2>&1 && PYTHON=$(which python$VER)
-    if [ $VER -eq 2 ]; then
-        which python2.7 >/dev/null 2>&1 && PYTHON=$(which python2.7)
-    else
-        which python3.4 >/dev/null 2>&1 && PYTHON=$(which python3.4)
-        which python3.5 >/dev/null 2>&1 && PYTHON=$(which python3.5)
-        which python3.6 >/dev/null 2>&1 && PYTHON=$(which python3.6)
-    fi
-fi
+. "$(dirname $0)/common.sh"
 
 [ -z "${TMPDIR}" ] && TMPDIR="/tmp"