a good mashup of envdir + docker's env-file. Intended to be used as a docker entrypoint script like:
#!/usr/bin/envdir++ /bin/sh
This allows pointing envdir++ to a directory if docker compatible env-file's. See the example .env/ folder in this repository and test.sh scripts for examples of how this works.
Intended use case is pairing Vault Agent with Kubernetes, were Vault Agent runs as an initContainer, spits out secrets as files into /vault/secrets/*. This then reads those files and elevates them into environment variables so your application can access them.
Add to your Dockerfile:
FROM alpine
ENV ENVDIR_VERSION v0.4.0
RUN set -eux; \
\
apk add --no-cache --virtual .build-deps \
gnupg \
wget \
; \
wget -O /usr/bin/envdir++ "https://github.com/mattrobenolt/envdir-plusplus/releases/download/$ENVDIR_VERSION/envdir++-linux-amd64"; \
wget -O /usr/bin/envdir++.asc "https://github.com/mattrobenolt/envdir-plusplus/releases/download/$ENVDIR_VERSION/envdir++-linux-amd64.asc"; \
export GNUPGHOME="$(mktemp -d)"; \
gpg --keyserver ha.pool.sks-keyservers.net --recv-keys D8749766A66DD714236A932C3B2D400CE5BBCA60; \
gpg --batch --verify /usr/bin/envdir++.asc /usr/bin/envdir++; \
rm -rf "$GNUPGHOME" /usr/bin/envdir++.asc; \
chmod +x /usr/bin/envdir++; \
envdir++ /bin/sh -c 'echo ok'; \
apk del --no-network .build-deps