Align dev container Instant Client TZ data with Oracle server

Apply the workaround from rsim#292 to the dev container. CI fixed
`ORA-01805: possible error in date/time operation` by copying the
running Oracle server's `timezlrg_*.dat` into the Instant Client's
`oracore/zoneinfo/` and pointing `ORA_TZFILE` at it. The dev container
combines `gvenzl/oracle-free:latest` with the Instant Client installed
via the app `Dockerfile`, so it is exposed to the same drift and
benefits from the same fix.

PR rsim#301 ported the workaround by adding the
`docker-outside-of-docker` feature and copying the file from inside
the dev container via `docker exec` / `docker cp`. That approach
fails on Dev Containers 0.459.0 with the `mcr.microsoft.com/devcontainers/base:trixie`
base image because Debian trixie removed `moby-cli`:

    (!) The 'moby' option is not supported on Debian 'trixie' because
        'moby-cli' and related system packages have been removed from
        that distribution.
    ERROR: Feature "Docker (docker-outside-of-docker)" failed to install!

Move the copy to the host, where Docker is already available. Mirrors
rsim/oracle-enhanced#2799.

- `.devcontainer/initializeCommand.sh` (new) -- pull
  `gvenzl/oracle-free:latest`, then extract
  `$ORACLE_HOME/oracore/zoneinfo/timezlrg_*.dat` from an ephemeral
  container into `.devcontainer/tzdata/` on the host. No DB start, no
  readiness wait -- the file ships in the image.
- `.devcontainer/devcontainer.json` -- `initializeCommand` now runs
  the new script (it previously did the inline `docker pull`). The
  `docker-outside-of-docker` feature, added in rsim#301 and never merged
  to master, stays absent.
- `.devcontainer/docker-compose.yml` -- bind-mount
  `.devcontainer/tzdata` read-only at `/opt/tzdata` inside the `app`
  service.
- `.devcontainer/postCreateCommand.sh` -- set `ORA_TZFILE` from
  `/opt/tzdata/timezlrg_*.dat` and persist it via
  `/etc/profile.d/ora-tzfile.sh` so interactive shells and
  `bundle exec` runs pick it up.
- `.gitignore` -- ignore `.devcontainer/tzdata/`.

No `docker-outside-of-docker` feature, no `/var/run/docker.sock` bind,
and no network access during the dev container build.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: yahonda

.devcontainer/devcontainer.json

@@ -15,7 +15,7 @@
       ]
     }
   },
-  "initializeCommand": "docker pull gvenzl/oracle-free:latest",
+  "initializeCommand": "bash .devcontainer/initializeCommand.sh",
   "postCreateCommand": "bash .devcontainer/postCreateCommand.sh",
   "remoteEnv": {
     "DATABASE_NAME": "FREEPDB1",

.devcontainer/docker-compose.yml

@@ -5,6 +5,7 @@ services:
       dockerfile: Dockerfile
     volumes:
       - ../..:/workspaces:cached
+      - ./tzdata:/opt/tzdata:ro
     command: sleep infinity
     network_mode: service:oracle
 

.devcontainer/initializeCommand.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+IMAGE=gvenzl/oracle-free:latest
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+OUT_DIR="$SCRIPT_DIR/tzdata"
+
+docker pull "$IMAGE"
+
+mkdir -p "$OUT_DIR"
+rm -f "$OUT_DIR"/timezlrg_*.dat "$OUT_DIR"/timezdif_*.dat
+
+docker run --rm --entrypoint sh \
+  -v "$OUT_DIR:/out" \
+  "$IMAGE" \
+  -c 'cp "$ORACLE_HOME"/oracore/zoneinfo/timezlrg_*.dat /out/ && chmod a+r /out/*.dat'
+
+ls -1 "$OUT_DIR"

.devcontainer/postCreateCommand.sh

@@ -5,6 +5,18 @@ set -e
 gem update --system
 bundle install
 
+# Match Instant Client TZ data to the Oracle server's to avoid ORA-01805.
+# The file is extracted from the gvenzl image into .devcontainer/tzdata/ by
+# initializeCommand.sh and bind-mounted read-only at /opt/tzdata.
+TZ_FILE=$(ls /opt/tzdata/timezlrg_*.dat 2>/dev/null | head -1)
+if [ -n "$TZ_FILE" ]; then
+  echo "Using $TZ_FILE for Instant Client TZ data."
+  export ORA_TZFILE="$TZ_FILE"
+  echo "export ORA_TZFILE=$TZ_FILE" | sudo tee /etc/profile.d/ora-tzfile.sh > /dev/null
+else
+  echo "Warning: no timezlrg_*.dat found under /opt/tzdata; skipping ORA_TZFILE setup." >&2
+fi
+
 echo "Waiting for Oracle to be ready..."
 oracle_ready=false
 for i in $(seq 1 30); do

.gitignore

@@ -13,3 +13,4 @@ Gemfile.lock
 *.zip
 .idea
 spec/support/custom_config.rb
+.devcontainer/tzdata/