Docker install on arm64 Macbook - indexing fails

[rat10]

[I hope that this is the right place to post this issue. Feel free to redirect me]
I'm trying to install adfreiburg/qlever:latest on a Macbook with M4 processor with Docker. I'm quite clumsy with the command line etc, but I made it through the first steps. Indexing however fails.

Somehow I got QLever running as a Docker container with the Olympics dataset, queryable via the browser interface. That is obviously great, but now I'd like to test it on my own data. However, after successfully editing a Qleverfile to curl my data (it would have been easier to just copy the file into the data directory, as I later realized) I'm stuck with the next step, indexing. I hope the following excerpts are complete enough for you to figure out what's going wrong:

Mac: cd /Users/me/qlever 
Mac: docker run -it --name qlever -p 7001:7001 --rm -e UID=$(id -u) -e GID=1001 -v $(pwd):/data -w /data adfreiburg/qlever
qlever@docker:data$ cd ng
qlever@docker:ng$ ls
Qleverfile  ng.settings.json  ng.trig
qlever@docker:ng$ qlever index

Command: index

echo '{ "ascii-prefixes-only": false, "num-triples-per-batch": 100000 }' > ng.settings.json
docker run --rm -u $(id -u):$(id -g) -v /etc/localtime:/etc/localtime:ro -v $(pwd):/index -w /index --init --entrypoint bash --name qlever.index.ng docker.io/adfreiburg/qlever:latest -c 'cat ng.trig | IndexBuilderMain -i ng -s ng.settings.json -F ttl -f - --stxxl-memory 5G | tee ng.index-log.txt'

Building the index failed: /usr/bin/bash: line 1: docker: command not found

qlever@docker:ng$ 

ChatGPT o1 figured that this is an attempt to run Docker within Docker and proposed to run IndexBuilderMain -i ./ng ./ng/ng.trig -F ttl --stxxl-memory 1G directly and so I did:

qlever@docker:ng$ IndexBuilderMain -i . ./ng.trig  -F ttl --stxxl-memory 1G
2025-01-29 10:58:05.866 - INFO: QLever IndexBuilder, compiled on Wed Jan 22 12:51:19 UTC 2025 using git hash d7ec9b
2025-01-29 10:58:05.868 - ERROR: Assertion `!fileSpecifications.empty()` failed. Please report this to the developers. In file "/qlever/src/index/IndexBuilderMain.cpp " at line 329
qlever@docker:ng$ 

So I'm reporting, although I somehow doubt that this is an issue with Qlever, or the root of my problem (but it seems like a good enough excuse to ask for help ;-). Here is a link to the trig file. and this is the Qleverfile:

# Qleverfile derived from Olympics, use with https://github.com/ad-freiburg/qlever-control

[data]
NAME               = ng
BASE_URL           = https://github.com/rat10/nng/tree/main
GET_DATA_CMD       = curl -slo ng.trig https://raw.githubusercontent.com/rat10/nng/refs/heads/main/ramblings/rdf.ng%20since%20dec%2024/jan25%20data.trig
DESCRIPTION        = silly example data
TEXT_DESCRIPTION   = no literals

[index]
INPUT_FILES        = ng.trig
CAT_INPUT_FILES    = cat ${INPUT_FILES}
SETTINGS_JSON      = { "ascii-prefixes-only": false, "num-triples-per-batch": 100000 }

[server]
PORT               = 7777
ACCESS_TOKEN       = tl
MEMORY_FOR_QUERIES = 5G
CACHE_MAX_SIZE     = 2G
TIMEOUT            = 30s

[runtime]
SYSTEM = docker
IMAGE  = docker.io/adfreiburg/qlever:latest

[ui]
UI_CONFIG = ng

---

A remark concerning the Mac: I first tried to run QLever with this command docker run -it --rm -e UID=$(id -u) -e GID=$(id -g) -v $(pwd):/data -w /data qlever -c "qlever setup-config olympics && qlever get-data && qlever index" (the container provided this on the shell). However, the GID parameter generated by this command seems to clash with a Mac preset. ChatGPT suggested to use some other number, and that worked (see below). If I omit the ID parameters, the container won't start, e.g.:

Mac:qlever t$ docker run  -it --name qlever -p 7001:7001 --rm -v $(pwd):/data -w /data adfreiburg/qlever

groupmod: invalid group ID 'qlever'