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2019-12-12challenge: Support "--diff=diffoscope"....* guix/scripts/challenge.scm (call-with-nar): New procedure. (narinfo-contents): Express in terms of 'call-with-nar'. (call-with-mismatches, report-differing-files/external): New procedures. (%diffoscope-command): New variable. (%options): Support "diffoscope" and a string starting with "/". * tests/challenge.scm (call-mismatch-test): New procedure. ("differing-files"): Rewrite in terms of 'call-mismatch-test'. ("call-with-mismatches"): New test. * doc/guix.texi (Invoking guix challenge): Document it. Ludovic Courtès
2019-12-12challenge: Add "--diff"....* guix/scripts/challenge.scm (dump-port*): New variable. (archive-contents, store-item-contents, narinfo-contents) (differing-files, report-differing-files): New procedures. (summarize-report): Add #:report-differences and call it. (show-help, %options): Add "--diff". (%default-options): Add 'difference-report' key. (report-differing-files): Parameterize CURRENT-TERMINAL-COLUMNS and pass #:report-differences to 'summarize-report'. * guix/tests/http.scm (%local-url): Add optional argument. (call-with-http-server): Fix docstring typo. * tests/challenge.scm (query-path-size, make-narinfo): New procedures. ("differing-files"): New test. * doc/guix.texi (Invoking guix challenge): Document "--diff". Ludovic Courtès