My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=main 2026-05-25T22:51:17+00:00 2026-05-25T22:51:17+00:00 Craig Jennings c@cjennings.net 2026-05-25T22:51:17+00:00 urn:sha1:d665582d6fc19c15a772c6ec24ff822e7e3c37f9 Four export/publishing commands shelled out to external tools without checking they exist, so a missing tool surfaced as an opaque process error — or, for reveal.js, a silently broken presentation. I added a command-time guard to each that names the tool and what's needed: - zathura, in the pandoc PDF export-and-open command - the hugo binary and the platform file-manager opener, in hugo-config - the local reveal.js checkout (run scripts/setup-reveal.sh), shared by the reveal export and preview commands - pandoc, in the web-clip protocol handler The checks run only when the command runs, so startup stays quiet. Each guard has a test asserting the user-error fires when the tool is absent, and the existing happy-path tests now stub the lookups so they exercise the real path rather than tripping the new guard.