First commit

Not sure if this even works yet.

README.md

@@ -1,2 +1,4 @@
 # heroku-buildpack-lightstep-collector
 Heroku buildpack to run the lightstep collector in each dyno
+
+Honestly not sure this even works yet.

bin/compile

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -eo pipefail
+
+# set -x
+
+BUILD_DIR=$1
+CACHE_DIR=$2
+ENV_DIR=$3
+BUILDPACK_DIR=$(cd "$(dirname "$0")"; cd ..; pwd)
+
+VERSION="2020.09.24.05.22.16Z"
+CACHED_VERSION="$CACHE_DIR/lightstep-collector-$VERSION"
+
+arrow() {
+  echo '----->' "$@"
+}
+
+fetch_lightstep() {
+  if [ ! -f "$CACHED_VERSION" ]; then
+    arrow "Installing LightStep collector ${VERSION}"
+    wget \
+      -O lightstep-collector.deb \
+      --quiet \
+      --content-disposition \
+      https://packagecloud.io/lightstep/collector/packages/ubuntu/bionic/lightstep-collector_${VERSION}_amd64.deb/download.deb
+
+    UNPACK_DIR="lightstep-collector-${VERSION}"
+    dpkg -x lightstep-collector.deb "$UNPACK_DIR"
+
+    # Only contains usr/share/doc
+    rm -rf "$UNPACK_DIR/usr"
+
+    mkdir "$CACHED_VERSION"
+    mv "$UNPACK_DIR/*" "$CACHED_VERSION/"
+  else
+    arrow "LightStep collector ${VERSION} found in cache"
+  fi
+}
+
+install_lightstep() {
+  mkdir -p "$BUILD_DIR/bin/lightstep-collector"
+  mkdir -p "$BUILD_DIR/.profile.d"
+
+  cp "$CACHE_DIR/opt/lightstep/collector" "$BUILD_DIR/bin/lightstep-collector/collector"
+  cp "$BUILDPACK_DIR/extra/lightstep-collector.sh" "$BUILD_DIR/.profile.d/lightstep-collector.sh"
+}
+
+fetch_lightstep
+install_lightstep

bin/detect

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+#!/bin/bash
+
+echo "LightStep Collector"

bin/release

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+cat <<EOF
+---
+EOF

extra/lightstep-collector.sh

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+#!/bin/bash
+
+ulimit -n $(ulimit -n -H)
+
+LS_POOL=${LS_POOL:-heroku}
+LS_GUID="${HEROKU_APP_NAME}-${DYNO}"
+LS_BYTES_PER_PROJECT=${LS_BYTES_PER_PROJECT:-100000}
+# TODO: metrics
+# TODO: ports
+cat <<EOF > "$HOME/bin/lightstep-collector/collector.yaml"
+api_key: ${LS_API_KEY}
+pool: ${LS_POOL}
+guid: ${LS_GUID}
+babysitter_port: 8000
+plain_port: 8383
+admin:
+  plain_port: 8080
+http:
+  plain_port: 8181
+grpc:
+  plain_port: 8282
+instrument:
+  start_wait_time_limit: 30s
+reporter:
+  bytes_per_project: ${LS_BYTES_PER_PROJECT}
+  span_group_update_period: 2s
+EOF
+
+"$HOME/bin/lightstep-collector/collector" \
+  --collector_base_config="$HOME/bin/lightstep-collector/collector.yaml" 2>&1 &