conda-rename-env.sh

# Rename conda env and redirect bash shebang to new env.
#
# Reference
# ---------
# https://stackoverflow.com/a/62853056/11533669

# rename
# The two variables below should be something like path str or filename if the file presents in current directory
mv $OLD_ENV_NAME $NEW_ENV_NAME

# modify bash shebang
## GNU/Linux
sed -i "s:$(head -1 $NEW_ENV_NAME/bin/pip):#\!$PWD/$NEW_ENV_NAME/bin/python:" $NEW_ENV_NAME/bin/*

## FreeBSD/MacOS
gsed -i "s:$(head -1 $NEW_ENV_NAME/bin/pip):#\!$PWD/$NEW_ENV_NAME/bin/python:" $NEW_ENV_NAME/bin/*

# or wrap up to a function (MacOS case)
# $1: old env name; $2: new env name
function rename-env() {
    mv $1 $2
    gsed -i "s:$(head -1 $2/bin/pip):#\!$PWD/$2/bin/python:" $2/bin/*
}