Shrink extensions with scratch, add ltrace for dev, and format

.devcontainer/Dockerfile

@@ -1,16 +1,16 @@
 FROM mcr.microsoft.com/vscode/devcontainers/rust
 
-RUN sudo apt-get update -y && \
-    sudo apt-get upgrade -y && \
-    sudo apt-get install zip musl-tools -y
+RUN sudo apt-get update -y \
+    && sudo apt-get upgrade -y \
+    && sudo apt-get install zip musl-tools ltrace -y
 
-RUN rustup update && \
-    rustup target add x86_64-unknown-linux-musl
+RUN rustup update \
+    && rustup target add x86_64-unknown-linux-musl
 
 RUN sudo apt-get install -y nodejs
 
-RUN cd /tmp && \
-    curl -L https://github.com/aws/aws-sam-cli/releases/latest/download/aws-sam-cli-linux-x86_64.zip > aws-sam-cli-linux-x86_64.zip && \
-    unzip aws-sam-cli-linux-x86_64.zip -d sam-installation && \
-    rm -rf aws-sam-cli-linux-x86_64.zip && \
-    sudo ./sam-installation/install
+RUN cd /tmp \
+    && curl -L https://github.com/aws/aws-sam-cli/releases/latest/download/aws-sam-cli-linux-x86_64.zip > aws-sam-cli-linux-x86_64.zip \
+    && unzip aws-sam-cli-linux-x86_64.zip -d sam-installation \
+    && rm -rf aws-sam-cli-linux-x86_64.zip \
+    && sudo ./sam-installation/install

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+
+ - `ltrace` for debugging
+
+### Changed
+
+ - Use `scratch` base instead of `alpine` for smaller lambda extension images.
+
 ## [0.94.0] - 2022-10-03
 
 Schedule release. No changes.

package/Dockerfile-amzn

@@ -1,4 +1,4 @@
-FROM alpine
+FROM scratch
 LABEL org.opencontainers.image.source "https://github.com/customink/crypteia"
 LABEL org.opencontainers.image.description "Rust Lambda Extension for any Runtime to preload SSM Parameters as Secure Environment Variables!"
 COPY ./package/opt /opt

package/Dockerfile-debian

@@ -1,4 +1,4 @@
-FROM alpine
+FROM scratch
 LABEL org.opencontainers.image.source "https://github.com/customink/crypteia"
 LABEL org.opencontainers.image.description "Rust Lambda Extension for any Runtime to preload SSM Parameters as Secure Environment Variables!"
 COPY ./package/opt /opt

test/libcrypteia.sh

@@ -14,7 +14,7 @@ echo "============================="
 echo "== Simulating crypteia binary JSON write =="
 echo '{
   "SECRET": "1A2B3C4D5E6F",
-  "ACCESS_KEY": "G7H8I9J0K1L2", 
+  "ACCESS_KEY": "G7H8I9J0K1L2",
   "DB_URL": "mysql2://u:p@host:3306",
   "NR_KEY": "z6y5x4w3v2u1"
 }' > $CRYPTEIA_ENV_FILE
@@ -38,7 +38,7 @@ assert "./test/libcrypteia/_envfile.sh" \
 
 assert "./test/libcrypteia/empty-${TEST_LANG}.sh" \
        "undefined"
-       
+
 assert "./test/libcrypteia/fullpath-${TEST_LANG}.sh" \
        "x-crypteia-ssm-path:/crypteia/v5/myapp/envs" \
        "Because not replaced by a single env var."