Consolidate checks for python version

Most of the bespoke logic for the version check is unnecessary,
since the output to display can be easily inferred from the filename.

This fixes some test failures where the version check would cat a
file to fake the output, but fail because the file was removed.

1 files changed, 36 insertions, 0 deletions

diff --git a/scripts/python-check b/scripts/python-check
new file mode 100644
index 00000000..6b79897f
--- /dev/null
+++ b/scripts/python-check
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Copyright (C) 2012  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# When sourced by scripts, if the python version is too old
+# fake the output and exit.
+
+if ! python --version 2>&1 | grep '^Python 2\.[78]' > /dev/null
+then
+    outpath="$(dirname "$0")/$(basename "$0" .script).stdout"
+    errpath="$(dirname "$0")/$(basename "$0" .script).stderr"
+    exitpath="$(dirname "$0")/$(basename "$0" .script).exit"
+    if [ -r "$outpath" ]; then
+        cat "$outpath"
+    fi
+    if [ -r "$errpath" ]; then
+        cat "$errpath" >&2
+    fi
+    if [ -r "$exitpath" ]; then
+        exit "$(cat "$exitpath")"
+    else
+        exit 0
+    fi
+fi