Move env_setup to pw_env_setup
Bug: 67
Change-Id: I285e917968b2e24e0851753ea4802cef1fbe2d67
diff --git a/pw_env_setup/env_setup.sh b/pw_env_setup/env_setup.sh
new file mode 100644
index 0000000..a9d18e8
--- /dev/null
+++ b/pw_env_setup/env_setup.sh
@@ -0,0 +1,56 @@
+# Copyright 2020 The Pigweed Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+# This script must be tested on bash, zsh, and dash.
+
+_abspath () {
+ python -c "import os.path; print(os.path.abspath('$@'))"
+}
+
+# Shell: bash.
+if test -n "$BASH"; then
+ PW_SETUP_SCRIPT_PATH=$(_abspath $BASH_SOURCE)
+# Shell: zsh.
+elif test -n "$ZSH_NAME"; then
+ PW_SETUP_SCRIPT_PATH=$(_abspath ${(%):-%N})
+# Shell: dash.
+elif test ${0##*/} = dash; then
+ PW_SETUP_SCRIPT_PATH=$(_abspath \
+ $(lsof -p $$ -Fn0 | tail -1 | sed 's#^[^/]*##;'))
+# If everything else fails, try $0. It could work.
+else
+ PW_SETUP_SCRIPT_PATH=$(_abspath $0)
+fi
+
+PW_ROOT=$(dirname $(dirname $PW_SETUP_SCRIPT_PATH))
+export PW_ROOT
+
+SETUP_SH="$PW_ROOT/pw_env_setup/.setup.sh"
+
+# Try to use Python 3 if possible by default, before Python 2.
+if which python3 &> /dev/null; then
+ PYTHON=python3
+else
+ PYTHON=python
+fi
+
+# Run full bootstrap when invoked as bootstrap, or env file is missing/empty.
+if \
+ [ $(basename $PW_SETUP_SCRIPT_PATH) = "bootstrap.sh" ] || \
+ [ ! -f $SETUP_SH ] || \
+ [ ! -s $SETUP_SH ]; then
+ $PYTHON $PW_ROOT/pw_env_setup/py/pw_env_setup/env_setup.py --shell-file $SETUP_SH
+fi
+
+. $SETUP_SH