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This is a submission for DEV's Summer Bug Smash: Clear the Lineup powered by Sentry . You are migrating a 50,000-message Slack workspace to Zulip. Somewhere around message 31,000 the import dies with KeyError: 'ts' . Annoying, but here is the uncomfortable part: that is the lucky outcome. The unlucky one is "ts": "NaN" , where nothing dies, nothing warns, and your company's message history quietly comes out in the wrong order. TL;DR: Zulip's Slack importer used float(message["ts"]) unguarded, both as a sort key and as date_sent . One message with a missing or malformed ts aborted the entire import; a non-finite value like "NaN" did not even raise, it silently broke the sort. My fix ( zulip/zulip#39813 ) skips such messages with a warning and requires ts to parse to a finite float via math.isfinite . The regression test fails with KeyError: 'ts' on the old code. Project Overview Zulip is an open-source team chat server (Django/Python, ~25k stars) with an unusually strict engineering culture: near-total backend test coverage, strict mypy, and a commit discipline of "each commit is a minimal coherent idea". The code I touched lives in zerver/data_import/ : the subsystem that converts exports from Slack, Microsoft Teams, and Mattermost into Zulip's format. This subsystem has one property that should shape every line in it: the input is another tool's output. Import is a long batch process over data of arbitrary quality, and the admin running the migration has no way to "fix" what Slack's export tool produced. A pipeline that dies on record 31,207 of 50,000 is strictly worse than one that skips record 31,207 with a warning. Bug Fix or Performance Improvement get_messages_iterator() in zerver/data_import/slack.py streams every message of the export, sorting each day's messages by timestamp: yield from sorted ( messages_for_one_day , key = get_timestamp_from_message ) where the sort key was simply: def get_timestamp_from_message ( message : ZerverFieldsT ) -> float : retur

ImgProxy is an open-source image-processing server — resize, convert, and transform images on the fly via URL parameters, ideal as a caching layer in front of a CDN or web app. This guide builds ImgProxy from source on Ubuntu, runs it as a systemd service behind Nginx with TLS, walks through its URL processing options, and secures it with signed URLs. Prerequisites: an Ubuntu server, a domain A record (e.g. imgproxy.example.com ), non-root sudo user. Install ImgProxy ImgProxy uses libvips for image processing; this builds it from source with Go. $ sudo add-apt-repository ppa:dhor/myway $ sudo apt update $ sudo apt install libvips-dev -y $ sudo snap install --classic --channel = latest/stable go $ git clone https://github.com/imgproxy/imgproxy.git $ cd imgproxy $ sudo CGO_LDFLAGS_ALLOW = "-s|-w" go build -o /usr/local/bin/imgproxy Create the environment config: $ sudo touch /usr/local/bin/imgproxy.env $ sudo nano /usr/local/bin/imgproxy.env IMGPROXY_BIND = :8080 IMGPROXY_NETWORK = tcp IMGPROXY_READ_TIMEOUT = 10 IMGPROXY_WRITE_TIMEOUT = 10 IMGPROXY_WORKERS = 2 IMGPROXY_REQUESTS_QUEUE_SIZE = 0 IMGPROXY_QUALITY = 100 IMGPROXY_PREFERRED_FORMATS = webp,jpeg,png,gif,avif IMGPROXY_LOG_FORMAT = "pretty" IMGPROXY_LOG_LEVEL = "INFO" IMGPROXY_WATERMARK_URL = https://example.com/watermark.png IMGPROXY_WATERMARK_OPACITY = 1 Key settings: IMGPROXY_WORKERS should be ~2× your vCPU count; IMGPROXY_REQUESTS_QUEUE_SIZE=0 means unlimited queueing; IMGPROXY_WATERMARK_URL points at whatever image you want overlaid when watermarking is enabled. Point ImgProxy at the config and test: $ export IMGPROXY_ENV_LOCAL_FILE_PATH = /usr/local/bin/imgproxy.env $ cd $ imgproxy WARNING [2024-05-28T00:40:42Z] No keys defined, so signature checking is disabled WARNING [2024-05-28T00:40:42Z] No salts defined, so signature checking is disabled INFO [2024-05-28T00:40:42Z] Starting server at :8080 Stop it with Ctrl+C once verified, then set it up as a service. Run ImgProxy as a systemd Service $ sudo useradd

A few days ago I fixed update_article , one of the tools in this repo's MCP server, because it had a nasty shape: it took a bare integer article_id , PUT whatever fields you gave it straight to the DEV.to API, and if the id was wrong or hallucinated, it would silently overwrite a live published post with nothing left behind to show it had happened. The fix added a fetch-before-write diff and a JSONL audit log: _ARTICLE_UPDATE_LOG = " logs/article_updates.jsonl " def _log_article_update ( article_id , before , fields_changed , after ): os . makedirs ( os . path . dirname ( _ARTICLE_UPDATE_LOG ), exist_ok = True ) entry = { " article_id " : article_id , " fields_changed " : sorted ( fields_changed ), " url " : after . get ( " url " )} for field in fields_changed : entry [ f " { field } _before " ] = before . get ( field ) entry [ f " { field } _after " ] = after . get ( field ) with open ( _ARTICLE_UPDATE_LOG , " a " ) as f : f . write ( json . dumps ( entry ) + " \n " ) The whole point of that function is durability. "Zero trace" was the bug; a JSONL file that records before/after state on every write was the fix. I verified the logging logic itself with an offline unit test against fake before/after states and moved on, same as the diff field. What I never checked is whether logs/article_updates.jsonl outlives the process that writes it. Checking whether the trace actually exists anywhere logs/ isn't in .gitignore — I checked, it's not there. So nothing is actively hiding it. But not-hidden isn't the same as tracked: $ git log --all --oneline -- 'logs/*' $ ls logs/ ls: cannot access 'logs/': No such file or directory Empty output from the first command, across every branch and every commit this repo has ever had (50 commits, not a shallow clone — git rev-parse --is-shallow-repository is false ). Nothing has ever touched logs/ . The directory doesn't even exist right now. Not because anything deleted it — because nothing has ever run update_article in an environment

code-server is the open-source project that runs full VS Code including extensions, integrated terminal, Git, IntelliSense — on a remote server, accessible from any browser. This guide deploys it on Ubuntu 24.04 with Docker Compose, fronted by Traefik for automatic HTTPS. Prerequisites: an Ubuntu 24.04 server (1GB RAM / 2 vCPU minimum), a domain A record (e.g. code.example.com ), Docker and Docker Compose installed. Set Up the Project $ mkdir -p ~/vscode-server/ { project,config,local,letsencrypt } $ cd ~/vscode-server project — your editable workspace config — code-server settings/extensions local — user-specific data letsencrypt — Traefik's ACME certificate storage Find your UID/GID and add yourself to the docker group: $ id $USER $ sudo usermod -aG docker $USER Write the Compose File $ nano docker-compose.yml services : code-server : image : codercom/code-server:latest container_name : code-server user : " UID:GID" # Replace with your user's UID and GID environment : - PASSWORD=SECURE_PASSWORD # Replace with a strong password - DOCKER_USER=LINUXUSER # Replace with your username volumes : - ./project:/home/coder/project - ./config:/home/coder/.config - ./local:/home/coder/.local networks : - internal restart : unless-stopped labels : - " traefik.enable=true" - " traefik.http.routers.code-server.rule=Host(`CODE.EXAMPLE.COM`)" # Replace with your domain name - " traefik.http.routers.code-server.entrypoints=websecure" - " traefik.http.routers.code-server.tls.certresolver=myresolver" - " traefik.http.services.code-server.loadbalancer.server.port=8080" traefik : image : traefik:latest container_name : traefik ports : - " 80:80" - " 443:443" volumes : - /var/run/docker.sock:/var/run/docker.sock:ro - ./letsencrypt:/letsencrypt command : - " --providers.docker=true" - " --providers.docker.exposedbydefault=false" - " --providers.docker.network=internal" - " --entrypoints.web.address=:80" - " --entrypoints.websecure.address=:443" - " --entrypoints.web.http.redirections.entr