diff options
Diffstat (limited to 'guix/build/download.scm')
| -rw-r--r-- | guix/build/download.scm | 83 |
1 files changed, 57 insertions, 26 deletions
diff --git a/guix/build/download.scm b/guix/build/download.scm index 6e85174bc9..d362fc1f26 100644 --- a/guix/build/download.scm +++ b/guix/build/download.scm @@ -36,8 +36,10 @@ resolve-uri-reference maybe-expand-mirrors url-fetch + byte-count->string progress-proc - uri-abbreviation)) + uri-abbreviation + store-path-abbreviation)) ;;; Commentary: ;;; @@ -49,6 +51,11 @@ ;; Size of the HTTP receive buffer. 65536) +(define (nearest-exact-integer x) + "Given a real number X, return the nearest exact integer, with ties going to +the nearest exact even integer." + (inexact->exact (round x))) + (define (duration->seconds duration) "Return the number of seconds represented by DURATION, a 'time-duration' object, as an inexact number." @@ -56,16 +63,17 @@ object, as an inexact number." (/ (time-nanosecond duration) 1e9))) (define (seconds->string duration) - "Given DURATION in seconds, return a string representing it in 'hh:mm:ss' -format." + "Given DURATION in seconds, return a string representing it in 'mm:ss' or +'hh:mm:ss' format, as needed." (if (not (number? duration)) - "00:00:00" - (let* ((total-seconds (inexact->exact (round duration))) + "00:00" + (let* ((total-seconds (nearest-exact-integer duration)) (extra-seconds (modulo total-seconds 3600)) - (hours (quotient total-seconds 3600)) + (num-hours (quotient total-seconds 3600)) + (hours (and (positive? num-hours) num-hours)) (mins (quotient extra-seconds 60)) (secs (modulo extra-seconds 60))) - (format #f "~2,'0d:~2,'0d:~2,'0d" hours mins secs)))) + (format #f "~@[~2,'0d:~]~2,'0d:~2,'0d" hours mins secs)))) (define (byte-count->string size) "Given SIZE in bytes, return a string representing it in a human-readable @@ -75,8 +83,8 @@ way." (GiB (expt 1024. 3)) (TiB (expt 1024. 4))) (cond - ((< size KiB) (format #f "~dB" (inexact->exact size))) - ((< size MiB) (format #f "~dKiB" (inexact->exact (round (/ size KiB))))) + ((< size KiB) (format #f "~dB" (nearest-exact-integer size))) + ((< size MiB) (format #f "~dKiB" (nearest-exact-integer (/ size KiB)))) ((< size GiB) (format #f "~,1fMiB" (/ size MiB))) ((< size TiB) (format #f "~,2fGiB" (/ size GiB))) (else (format #f "~,3fTiB" (/ size TiB)))))) @@ -91,10 +99,33 @@ width of the bar is BAR-WIDTH." (make-string filled #\#) (make-string empty #\space)))) -(define* (progress-proc file size #:optional (log-port (current-output-port))) +(define (string-pad-middle left right len) + "Combine LEFT and RIGHT with enough padding in the middle so that the +resulting string has length at least LEN. This right justifies RIGHT." + (string-append left + (string-pad right (max 0 (- len (string-length left)))))) + +(define (store-url-abbreviation url) + "Return a friendlier version of URL for display." + (let ((store-path (string-append (%store-directory) "/" (basename url)))) + ;; Take advantage of the implementation for store paths. + (store-path-abbreviation store-path))) + +(define* (store-path-abbreviation store-path #:optional (prefix-length 6)) + "Return an abbreviation of STORE-PATH for display, showing PREFIX-LENGTH +characters of the hash." + (let ((base (basename store-path))) + (string-append (string-take base prefix-length) + "…" + (string-drop base 32)))) + +(define* (progress-proc file size + #:optional (log-port (current-output-port)) + #:key (abbreviation identity)) "Return a procedure to show the progress of FILE's download, which is SIZE bytes long. The returned procedure is suitable for use as an argument to -`dump-port'. The progress report is written to LOG-PORT." +`dump-port'. The progress report is written to LOG-PORT, with ABBREVIATION +used to shorten FILE for display." ;; XXX: Because of <http://bugs.gnu.org/19939> this procedure is often not ;; called as frequently as we'd like too; this is especially bad with Nginx ;; on hydra.gnu.org, which returns whole nars as a single chunk. @@ -118,31 +149,31 @@ bytes long. The returned procedure is suitable for use as an argument to (/ transferred elapsed) 0)) (left (format #f " ~a ~a" - (basename file) + (abbreviation file) (byte-count->string size))) (right (format #f "~a/s ~a ~a~6,1f%" (byte-count->string throughput) (seconds->string elapsed) - (progress-bar %) %)) - ;; TODO: Make this adapt to the actual terminal width. - (cols 80) - (num-spaces (max 1 (- cols (+ (string-length left) - (string-length right))))) - (gap (make-string num-spaces #\space))) - (format log-port "~a~a~a" left gap right) + (progress-bar %) %))) + ;; TODO: Make this adapt to the actual terminal width. + (display (string-pad-middle left right 80) log-port) (display #\cr log-port) (flush-output-port log-port) (cont)))) (lambda (transferred cont) (with-elapsed-time elapsed - (let ((throughput (if elapsed - (/ transferred elapsed) - 0))) + (let* ((throughput (if elapsed + (/ transferred elapsed) + 0)) + (left (format #f " ~a" + (abbreviation file))) + (right (format #f "~a/s ~a | ~a transferred" + (byte-count->string throughput) + (seconds->string elapsed) + (byte-count->string transferred)))) + ;; TODO: Make this adapt to the actual terminal width. + (display (string-pad-middle left right 80) log-port) (display #\cr log-port) - (format log-port "~a\t~a transferred (~a/s)" - file - (byte-count->string transferred) - (byte-count->string throughput)) (flush-output-port log-port) (cont)))))))) |