feat(wpcarro/emacs): Package bytes.el

Another meh package, but let's finish the job and package it up.

Change-Id: I7852a776c93c8c6717878a5ee0742287d2d23052
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7394
Reviewed-by: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI

users/wpcarro/emacs/pkgs/bytes/bytes.el

@@ -34,31 +34,32 @@
 ;;  overflow.  I imagine a larger integer type may exist, but for now, I'll
 ;;  treat this as a YAGNI.
 
-(require 'prelude)
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Dependencies
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
 (require 'tuple)
-(require 'math)
-(require 'number)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Constants
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(defconst bytes-kb (math-exp 2 10)
+(defconst bytes-kb (expt 2 10)
   "Number of bytes in a kilobyte.")
 
-(defconst bytes-mb (math-exp 2 20)
+(defconst bytes-mb (expt 2 20)
   "Number of bytes in a megabytes.")
 
-(defconst bytes-gb (math-exp 2 30)
+(defconst bytes-gb (expt 2 30)
   "Number of bytes in a gigabyte.")
 
-(defconst bytes-tb (math-exp 2 40)
+(defconst bytes-tb (expt 2 40)
   "Number of bytes in a terabyte.")
 
-(defconst bytes-pb (math-exp 2 50)
+(defconst bytes-pb (expt 2 50)
   "Number of bytes in a petabyte.")
 
-(defconst bytes-eb (math-exp 2 60)
+(defconst bytes-eb (expt 2 60)
   "Number of bytes in an exabyte.")
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -67,7 +68,6 @@
 
 (defun bytes-classify (x)
   "Return unit that closest fits byte count, X."
-  (prelude-assert (number-whole? x))
   (cond
    ((and (>= x 0)        (< x bytes-kb))     'byte)
    ((and (>= x bytes-kb) (< x bytes-mb)) 'kilobyte)
@@ -80,33 +80,15 @@
   "Convert integer X into a human-readable string."
   (let ((base-and-unit
          (pcase (bytes-classify x)
-           ('byte     (tuple/from        1 "B"))
+           ('byte     (tuple-from        1 "B"))
-           ('kilobyte (tuple/from bytes-kb "KB"))
+           ('kilobyte (tuple-from bytes-kb "KB"))
-           ('megabyte (tuple/from bytes-mb "MB"))
+           ('megabyte (tuple-from bytes-mb "MB"))
-           ('gigabyte (tuple/from bytes-gb "GB"))
+           ('gigabyte (tuple-from bytes-gb "GB"))
-           ('terabyte (tuple/from bytes-tb "TB"))
+           ('terabyte (tuple-from bytes-tb "TB"))
-           ('petabyte (tuple/from bytes-pb "PB")))))
+           ('petabyte (tuple-from bytes-pb "PB")))))
-    (string-format "%d%s"
+    (format "%d%s"
-                   (round x (tuple/first base-and-unit))
+            (round x (tuple-first base-and-unit))
-                   (tuple/second base-and-unit))))
+            (tuple-second base-and-unit))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; Tests
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(progn
-  (prelude-assert
-   (equal "1000B" (bytes-to-string 1000)))
-  (prelude-assert
-   (equal "2KB" (bytes-to-string (* 2 bytes-kb))))
-  (prelude-assert
-   (equal "17MB" (bytes-to-string (* 17 bytes-mb))))
-  (prelude-assert
-   (equal "419GB" (bytes-to-string (* 419 bytes-gb))))
-  (prelude-assert
-   (equal "999TB" (bytes-to-string (* 999 bytes-tb))))
-  (prelude-assert
-   (equal "2PB" (bytes-to-string (* 2 bytes-pb)))))
 
 (provide 'bytes)
 ;;; bytes.el ends here

users/wpcarro/emacs/pkgs/bytes/default.nix

@@ -0,0 +1,25 @@
+{ pkgs, depot, ... }:
+
+let
+  bytes = pkgs.callPackage
+    ({ emacsPackages }:
+      emacsPackages.trivialBuild {
+        pname = "bytes";
+        version = "1.0.0";
+        src = ./bytes.el;
+        packageRequires =
+          (with depot.users.wpcarro.emacs.pkgs; [
+            tuple
+          ]);
+      })
+    { };
+
+  emacs = (pkgs.emacsPackagesFor pkgs.emacs28).emacsWithPackages (epkgs: [ bytes ]);
+in
+bytes.overrideAttrs (_old: {
+  doCheck = true;
+  checkPhase = ''
+    ${emacs}/bin/emacs -batch \
+      -l ert -l ${./tests.el} -f ert-run-tests-batch-and-exit
+  '';
+})

users/wpcarro/emacs/pkgs/bytes/tests.el

@@ -0,0 +1,18 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Dependencies
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(require 'ert)
+(require 'bytes)
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Tests
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(ert-deftest bytes-to-string ()
+  (should (equal "1000B" (bytes-to-string 1000)))
+  (should (equal "2KB" (bytes-to-string (* 2 bytes-kb))))
+  (should (equal "17MB" (bytes-to-string (* 17 bytes-mb))))
+  (should (equal "419GB" (bytes-to-string (* 419 bytes-gb))))
+  (should (equal "999TB" (bytes-to-string (* 999 bytes-tb))))
+  (should (equal "2PB" (bytes-to-string (* 2 bytes-pb)))))