Example of using constraints.txt with local dependencies in "editable" mode

test_constraints.sh

#! /bin/bash

set -e

random-string() {
    cat /dev/urandom | tr -dc 'a-z0-9' | fold -w ${1:-32} | head -n 1
}

BASENAME=$(basename "$0")
TMP_DIR=$(mktemp -d -t ${BASENAME}-XXXXX)
VENV_DIR=${TMP_DIR}/_venv3
NS=ns$(random-string 10)
PKGX=py$(random-string 10)
PKGY=py$(random-string 10)
PKGZ=py$(random-string 10)

echo ${TMP_DIR}
python3 -m venv ${VENV_DIR}
source ${VENV_DIR}/bin/activate
pip install --upgrade pip
pip install pyscaffold

cd ${TMP_DIR} && \
    putup ${PKGX} --no-skeleton --tox &&
    putup ${PKGY} --namespace ${NS} --no-skeleton --tox && \
    putup ${PKGZ} --namespace ${NS} --no-skeleton --tox

# tree ${PKGX}
# tree ${PKGY}

sed -i.bak s/"# install_requires = numpy; scipy"/"install_requires = ${NS}.${PKGY}"/g ${PKGX}/setup.cfg
sed -i.bak s/"# install_requires = numpy; scipy"/"install_requires = ${NS}.${PKGZ}"/g ${PKGY}/setup.cfg
sed -i.bak s/"name = ${PKGY}"/"name = ${NS}.${PKGY}"/g ${PKGY}/setup.cfg
sed -i.bak s/"name = ${PKGZ}"/"name = ${NS}.${PKGZ}"/g ${PKGZ}/setup.cfg

cat <<EOF > constraints.txt
-e file://${TMP_DIR}/${PKGX}#egg=${PKGX}
-e file://${TMP_DIR}/${PKGY}#egg=${NS}.${PKGY}
-e file://${TMP_DIR}/${PKGZ}#egg=${NS}.${PKGZ}
EOF

cat <<EOF > requirements.txt
${PKGX}
EOF

pip install -r requirements.txt -c constraints.txt

python -c "import ${PKGX}"

cat <<EOF >> ${PKGX}/src/${PKGX}/__init__.py
import ${NS}.${PKGY} as y
print(y)
EOF

python -c "import ${PKGX}"

cat <<EOF >> ${PKGY}/src/${NS}/${PKGY}/__init__.py
import ${NS}.${PKGZ} as z
print(z)
EOF

cat <<EOF >> ${PKGZ}/src/${NS}/${PKGZ}/__init__.py
raise NotImplementedError("It worked!")
EOF

python -c "import ${PKGX}"