File scm-wrapper of Package obs-service-tar_scm

#!/bin/bash

# Wrapper around SCM to enable behaviour verification testing
# on tar_scm's repository caching code.  This is cleaner than
# writing tests which look inside the cache, because then they
# become coupled to the cache's implementation, and require
# knowledge of where the cache lives etc.

me=`basename $0`

if [ -z "$SCM_INVOCATION_LOG" ]; then
    cat <<EOF >&2
\$SCM_INVOCATION_LOG must be set before calling $0.
It should be invoked from the test suite, not directly.
EOF
    exit 1
fi

if [ "$me" = 'scm-wrapper' ]; then
    echo "$me should not be invoked directly, only via symlink" >&2
    exit 1
fi

echo "$me $*" >> "$SCM_INVOCATION_LOG"

/usr/bin/$me "$@"