oscar-export

oscar-export is a standalone Go CLI for exporting cache data from OSCAR-code directly to CSV without using the OSCAR GUI.

The Go module lives at github.com/dwin/oscar-export. If you install it with go install, the executable name is oscar-export.

It reproduces OSCAR's existing Summary, Sessions, and Details CSV exports from the on-disk cache under an OSCAR data root such as:

/path/to/OSCAR_Data

Relationship to OSCAR

• Current upstream repository: https://gitlab.com/CrimsonNape/OSCAR-code
• Upstream project license: GPL v3 only, documented in the upstream COPYING file
• oscar-export is focused on interoperability with OSCAR cache formats and reproducing OSCAR CSV output behavior
• oscar-export is an independent CLI and is not affiliated with the OSCAR maintainers

What It Exports

The CLI supports these export modes:

• summary: day-level CSV matching OSCAR's Summary export
• sessions: per-session CSV matching OSCAR's Sessions export
• details: raw event rows matching OSCAR's Details export

By default it:

• loads the selected OSCAR profile
• merges all CPAP machines in that profile
• uses the profile timezone from Profile.xml
• uses the profile sleep-day split rules from Profile.xml
• writes the same default filename style OSCAR uses when --out is omitted

Supported Cache Formats

This tool is intentionally scoped to the OSCAR cache formats present in the target data set:

• Summaries.xml.gz: version 1
• summary .000: version 18
• event .001: version 10
• Sessions.info: version 2

Unsupported versions fail fast with a clear error.

License

This repository is licensed under the GNU General Public License v3.0 only. See LICENSE.

Using GPL v3 only here keeps redistribution terms aligned with the current OSCAR-code upstream license and removes ambiguity around reuse of OSCAR-compatible export behavior and future upstream-derived work.

Installation

Install the latest version with Go:

go install github.com/dwin/oscar-export@latest

Or run it from a local checkout:

git clone https://github.com/dwin/oscar-export.git
cd oscar-export

CLI Layout

The command layout is:

oscar-export export summary
oscar-export export sessions
oscar-export export details

If you're running from a local checkout instead of an installed binary, replace oscar-export with go run ..

Shared flags:

• --root
• --profile-user
• --from
• --to
• --out
• --serial optional, for single-machine debugging

Usage

Generate a summary export:

oscar-export export summary \
  --root /path/to/OSCAR_Data \
  --profile-user your-profile-user \
  --from 2026-03-03 \
  --to 2026-03-17

Generate a sessions export:

oscar-export export sessions \
  --root /path/to/OSCAR_Data \
  --profile-user your-profile-user \
  --from 2026-03-03 \
  --to 2026-03-17

Generate a details export:

oscar-export export details \
  --root /path/to/OSCAR_Data \
  --profile-user your-profile-user \
  --from 2026-02-20 \
  --to 2026-03-06

Write to a specific file:

oscar-export export summary \
  --root /path/to/OSCAR_Data \
  --profile-user your-profile-user \
  --from 2026-03-03 \
  --to 2026-03-17 \
  --out ./oscar_summary.csv

Export a single machine by serial:

oscar-export export sessions \
  --root /path/to/OSCAR_Data \
  --profile-user your-profile-user \
  --serial 23182797776 \
  --from 2026-03-03 \
  --to 2026-03-17

Behavior Notes

• The profile password in Profile.xml is only an OSCAR UI access check. It does not encrypt the cache files.
• Sleep-day assignment follows OSCAR's day split behavior from Profile.xml.
• Summary uses merged day-level aggregates across enabled CPAP sessions.
• Sessions exports per-session rows for the grouped sleep days.
• Details exports only sessions that have event data.
• Total time uses overlap-aware union logic, matching OSCAR rather than naively summing session lengths.

Development

Fetch dependencies:

go mod tidy

Run unit tests:

go test ./...

Run the env-gated fixture comparisons against a real OSCAR data directory and existing OSCAR CSV exports:

OSCAR_DATA_DIR='/path/to/OSCAR_Data' \
OSCAR_EXPORT_DIR='/path/to/oscar-csv-exports' \
go test ./...

Optional profile override for integration tests:

OSCAR_PROFILE_USER=your-profile-user

Project Layout

.
  main.go
  cmd/
    root.go
    export.go
  internal/
    cache/
    export/