Replace envtpl with subvars for less deps

Fixes #71

pdns-admin-base-ngoduykhanh/Dockerfile

@@ -17,6 +17,11 @@ RUN curl -sSL -o /etc/yum.repos.d/yarn.repo https://dl.yarnpkg.com/rpm/yarn.repo
     yarn \
   && dnf clean all
 
+RUN arch=$([ "$(arch)" = 'aarch64' ] && echo -n 'arm64' || echo -n 'x86_64') \
+  && curl -fsSL https://github.com/kha7iq/subvars/releases/download/v0.1.4/subvars_Linux_${arch}.tar.gz \
+    | tar -xzf - -C /usr/local/bin subvars \
+  && chmod +x /usr/local/bin/subvars
+
 RUN mkdir -p /opt/powerdns-admin \
   && curl -sSL https://github.com/PowerDNS-Admin/PowerDNS-Admin/archive/refs/tags/v0.4.1.tar.gz \
     | tar -xzC /opt/powerdns-admin --strip 1 \
@@ -31,15 +36,15 @@ RUN mkdir -p /opt/powerdns-admin \
 
 WORKDIR /opt/powerdns-admin
 
-RUN pip3 install --no-cache-dir envtpl python-dotenv \
+RUN pip3 install --no-cache-dir python-dotenv \
   && pip3 install -r requirements.txt --no-cache-dir
 
 ENV FLASK_APP=/opt/powerdns-admin/powerdnsadmin/__init__.py
 
 COPY config.py.tpl /
 COPY run.py .
 
-RUN envtpl < /config.py.tpl > /opt/powerdns-admin/config.py \
+RUN subvars --prefix 'PDNS_ADMIN_' < /config.py.tpl > /opt/powerdns-admin/config.py \
   && sed -i '/SQLALCHEMY_DATABASE_URI/d' /opt/powerdns-admin/config.py
 
 RUN yarn install --pure-lockfile --production \

pdns-admin-base-ngoduykhanh/config.py.tpl

@@ -19,15 +19,14 @@ SESSION_TYPE = 'sqlalchemy'
 SAML_ENABLED = False
 
 # Configuration from env vars
-{%- for key, value in environment('PDNS_ADMIN_') %}
-{%- set v = value | trim('"\'\\') %}
-{%- if v in ['True', 'False', 'None', '0'] or v | int != 0 %}
-{{ key }} = {{ v }}
-{%- else %}
-{{ key }} = '{{ v }}'
-{%- endif %}
-{%- endfor %}
-
+{{ range $key, $value := match "PDNS_ADMIN_" -}}
+{{ $v := $value | trimAll "\"'\\" -}}
+{{ if or (eq $v "True" "False" "None" "0") (ne ($v | int) 0) -}}
+{{- $key | trimPrefix "PDNS_ADMIN_" }} = {{ $v }}
+{{ else -}}
+{{- $key | trimPrefix "PDNS_ADMIN_" }} = '{{ $v }}'
+{{ end -}}
+{{ end }}
 ### DATABASE CONFIG
 SQLALCHEMY_DATABASE_URI = 'mysql://' + SQLA_DB_USER + ':' + SQLA_DB_PASSWORD + '@' + SQLA_DB_HOST + ':' + str(SQLA_DB_PORT) + '/' + SQLA_DB_NAME
 SQLALCHEMY_TRACK_MODIFICATIONS = True

pdns-admin-uwsgi-ngoduykhanh/docker-entrypoint.sh

@@ -32,7 +32,7 @@ PDNS_ADMIN_SECRET_KEY="$(cat /root/secret-key)"
 
 export PDNS_ADMIN_SECRET_KEY
 
-envtpl < /config.py.tpl > /opt/powerdns-admin/powerdnsadmin/default_config.py
+subvars --prefix 'PDNS_ADMIN_' < /config.py.tpl > /opt/powerdns-admin/powerdnsadmin/default_config.py
 
 # Initialize DB if needed
 MYSQL_COMMAND="mysql -h ${PDNS_ADMIN_SQLA_DB_HOST} -P ${PDNS_ADMIN_SQLA_DB_PORT} -u ${PDNS_ADMIN_SQLA_DB_USER} -p${PDNS_ADMIN_SQLA_DB_PASSWORD}"

pdns-recursor/Dockerfile

@@ -2,11 +2,12 @@ FROM fedora:39
 
 RUN dnf -y --setopt=install_weak_deps=False install \
     pdns-recursor \
-    python3-pip \
-    python3-setuptools \
   && dnf clean all
 
-RUN pip3 install --no-cache-dir envtpl
+RUN arch=$([ "$(arch)" = 'aarch64' ] && echo -n 'arm64' || echo -n 'x86_64') \
+  && curl -fsSL https://github.com/kha7iq/subvars/releases/download/v0.1.4/subvars_Linux_${arch}.tar.gz \
+    | tar -xzf - -C /usr/local/bin subvars \
+  && chmod +x /usr/local/bin/subvars
 
 RUN mkdir -p /etc/pdns-recursor/api.d \
   && chown -R pdns-recursor: /etc/pdns-recursor/api.d \

pdns-recursor/Dockerfile.alpine

@@ -1,11 +1,12 @@
 FROM alpine:3.19.0
 
 RUN apk add --no-cache \
-    pdns-recursor \
-    py3-pip \
-    python3
+    pdns-recursor
 
-RUN pip3 install --no-cache-dir --break-system-packages envtpl
+RUN arch=$([ "$(arch)" = 'aarch64' ] && echo -n 'arm64' || echo -n 'x86_64') \
+  && wget -qO- https://github.com/kha7iq/subvars/releases/download/v0.1.4/subvars_Linux_${arch}.tar.gz \
+    | tar -xzf - -C /usr/local/bin subvars \
+  && chmod +x /usr/local/bin/subvars
 
 RUN mkdir -p /etc/pdns/api.d \
   && chown -R recursor: /etc/pdns/api.d \

pdns-recursor/docker-entrypoint.sh

@@ -18,7 +18,7 @@ elif [ -f /etc/alpine-release ]; then
 fi
 
 # Create config file from template
-envtpl < /recursor.conf.tpl > $config_file
+subvars --prefix 'PDNS_' < /recursor.conf.tpl > $config_file
 
 # Fix config file ownership
 chown ${pdns_user}: $config_file

pdns-recursor/recursor.conf.tpl

@@ -1,2 +1,3 @@
-{% for key, value in environment('PDNS_') %}{{ key|replace('_', '-') }}={{ value }}
-{% endfor %}
+{{ range $key, $value := match "PDNS_" -}}
+{{- $key | trimPrefix "PDNS_" | replace "_" "-" }} = {{ $value }}
+{{ end -}}

pdns/Dockerfile

@@ -6,11 +6,12 @@ RUN sed -i '/tsflags=nodocs/d' /etc/dnf/dnf.conf \
     mariadb \
     pdns \
     pdns-backend-mysql \
-    python3-pip \
-    python3-setuptools \
   && dnf clean all
 
-RUN pip3 install --no-cache-dir envtpl
+RUN arch=$([ "$(arch)" = 'aarch64' ] && echo -n 'arm64' || echo -n 'x86_64') \
+  && curl -fsSL https://github.com/kha7iq/subvars/releases/download/v0.1.4/subvars_Linux_${arch}.tar.gz \
+    | tar -xzf - -C /usr/local/bin subvars \
+  && chmod +x /usr/local/bin/subvars
 
 ENV VERSION=4.8 \
   PDNS_guardian=yes \

pdns/Dockerfile.alpine

@@ -4,11 +4,12 @@ RUN apk add --no-cache \
     mariadb-client \
     pdns \
     pdns-backend-mysql \
-    pdns-doc \
-    py3-pip \
-    python3
+    pdns-doc
 
-RUN pip3 install --no-cache-dir --break-system-packages envtpl
+RUN arch=$([ "$(arch)" = 'aarch64' ] && echo -n 'arm64' || echo -n 'x86_64') \
+  && wget -qO- https://github.com/kha7iq/subvars/releases/download/v0.1.4/subvars_Linux_${arch}.tar.gz \
+    | tar -xzf - -C /usr/local/bin subvars \
+  && chmod +x /usr/local/bin/subvars
 
 ENV VERSION=4.8 \
   PDNS_guardian=yes \

pdns/docker-entrypoint.sh

@@ -85,6 +85,6 @@ if [ "${PDNS_superslave:-no}" == "yes" ]; then
 fi
 
 # Create config file from template
-envtpl < /pdns.conf.tpl > /etc/pdns/pdns.conf
+subvars --prefix 'PDNS_' < /pdns.conf.tpl > /etc/pdns/pdns.conf
 
 exec "$@"

pdns/pdns.conf.tpl

@@ -1,2 +1,3 @@
-{% for key, value in environment('PDNS_') %}{{ key|replace('_', '-') }}={{ value }}
-{% endfor %}
+{{ range $key, $value := match "PDNS_" -}}
+{{- $key | trimPrefix "PDNS_" | replace "_" "-" }} = {{ $value }}
+{{ end -}}