deduplicate, reorganize some utility functions, inline docs
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pho4cexa
m455
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1 changed files with 66 additions and 46 deletions
112
main.scm
112
main.scm
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@ -19,22 +19,60 @@
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(define DESCRIPTION (or (get-environment-variable "REPO2HTML_DESCRIPTION") "my git repositories"))
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(define H1 (or (get-environment-variable "REPO2HTML_H1") "git.example.com"))
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;; small utilities ---------------------------------
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;; return the first x in xs for which (pred? member) is true,
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;; or #f if no such member is found.
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(define (first-if pred? xs)
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(cond ((null? xs) #f)
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((pred? (car xs)) (car xs))
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(else (first-if pred? (cdr xs)))))
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;; (bail [message [exit-status]])
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;; end the program immediately.
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;; if a message is provided, print it to the screen.
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;; exit-status defaults to 1.
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(define (bail . args)
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(let-optionals args ((msg "") (status 1))
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(unless (equal? "" msg) (print msg))
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(exit status)))
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;; decompose a path s into its constituent parts. returns values:
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;;
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;; root: "/" if it's an absolute path, "" if relative
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;; directory-elements: a list of each directory from root, () if none
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;; basename: the filename with extension removed like "readme" or ".bashrc"
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;; extension: the file extension with the dot, like ".txt" or "" if none
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;; relative-root: the relative path from the given path to the root
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;; e.g foo/bar/baz.html -> ../../
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;;
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;; this is intended to provide default values that make for easier reassembly
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;; into filenames.
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;;
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;; typical use:
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;; (->> source-file
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;; (pathparts)
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;; (define-values (root elements basename extension relative-root)))
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;;
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(define (pathparts s)
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(define-values (dirname basename extension)
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(decompose-pathname s))
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(define-values (origin root directory-elements)
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(decompose-directory (or dirname "")))
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;; discarding origin because idgaf about windows
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(values (or root "")
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(or directory-elements '())
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basename
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(if extension (string-append "." extension) "")
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(->>
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(or directory-elements '())
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(map (constantly "../"))
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(apply string-append))))
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;; main code ---------------------------------
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(define (populate-html-template repository-name source-files-list source-file display-body-thunk)
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(define-values (source-directory source-filename source-extension)
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(decompose-pathname source-file))
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(define-values (base-origin base-directory directory-elements)
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(if source-directory
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(decompose-directory source-directory)
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(values #f #f '())))
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(define relative-root
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(->>
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directory-elements
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(map (lambda (_) "../"))
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;; why is there no inverse function for decompose-directory in pathname?
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;; idgas about portability but a portable program would refer to the
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;; current platform's directory-separator here.
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(apply string-append)
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))
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(define-values (_ _ _ _ relative-root) (pathparts source-file))
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(display #<#string-block
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<!DOCTYPE html>
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@ -107,7 +145,7 @@ string-block
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(define (in-git-directory?)
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(not (eof-object? (call-with-input-pipe "git rev-parse --git-dir" read-line))))
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(define (is-text? path)
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(define (git-file-is-text? path)
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(not (equal?
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"-\t-\t"
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(call-with-input-pipe
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@ -124,26 +162,18 @@ string-block
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(string-intersperse "\n")))
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(define (display-source-html source-file) ;; src/main.scm
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(define-values (source-directory source-filename source-extension)
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(decompose-pathname source-file))
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(define-values (base-origin base-directory directory-elements)
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(if source-directory
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(decompose-directory source-directory)
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(values #f #f '())))
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(define-values (_ _ basename extension _) (pathparts source-file))
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(define (image-link)
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(format #t "<p><img src=\"~a\" /></p>" (make-pathname "" source-filename source-extension)))
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(format #t "<p><img src=\"~a~a\" /></p>" basename extension))
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(define (plaintext)
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(display "<pre>")
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(display-escaped-html (git-file->string source-file))
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(display "</pre>"))
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(define (binary)
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(display "<p>(Binary file)</p>"))
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(display "<p>(Binary file)</p>"))
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(format #t "<p id=\"file-path\">~a</p>" source-file)
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(case (string->symbol (or source-extension source-filename))
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;; markdown files get rendered in-place, unless there's an error, in which
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;; case escaped plaintext inside a <pre>
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((md markdown)
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(case (string->symbol extension)
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((.md .markdown)
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(handle-exceptions exn
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(begin
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(display "Error parsing " (current-error-port))
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@ -152,14 +182,14 @@ string-block
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(display "<p><b>There was an error parsing this file as Markdown.</b></p>")
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(plaintext))
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(markdown->html (git-file->string source-file))))
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((jpg jpeg png gif webp webm apng avif svgz ico)
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((.jpg .jpeg .png .gif .webp .webm .apng .avif .svgz .ico)
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(image-link))
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((svg)
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((.svg)
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(image-link) (plaintext))
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((gz pack idx)
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((.gz .pack .idx)
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(binary))
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(else
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(if (is-text? source-file)
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(if (git-file-is-text? source-file)
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(plaintext)
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(binary)))))
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@ -191,15 +221,10 @@ string-block
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(tr (th "Author") (th "Commits"))
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,(map
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(lambda (line)
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(let-values (((commits . author) (apply values (string-split line "\t"))))
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(let-values (((commits author) (apply values (string-split line "\t"))))
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`(tr (td ,author) (td ,commits))))
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(call-with-input-pipe "git shortlog -ns HEAD" read-lines))))))
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(define (first-if pred lst)
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(cond ((null? lst) #f)
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((pred (car lst)) (car lst))
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(else (first-if pred (cdr lst)))))
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(define (generate-html-files html-repo-path)
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(let ((source-files-list (git-repository->paths-list))
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(repository-name (pathname-strip-directory (string-chomp html-repo-path "/"))))
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@ -238,19 +263,14 @@ string-block
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(make-pathname html-repo-path "index.html")
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#t)))
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(define (bail . args)
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(let-optionals args ((status 1) (msg ""))
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(unless (equal? "" msg) (print msg))
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(exit status)))
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(define (main args)
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(let-optionals args ((html-repo-path ""))
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(when (equal? html-repo-path "")
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(bail 1 "please specify a destination directory for html files"))
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(bail "please specify a destination directory for html files"))
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(unless (in-git-directory?)
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(bail 1 "woops this isn't a git directory"))
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(bail "woops this isn't a git directory"))
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(generate-html-files html-repo-path)))
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