export-to-html

#!/bin/bash

# Copyright 2018 Pieter Hijma

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# This script exports .org files to .html files using Emacs.  Emacs will
# automatically install the package htmlize to create colored output for source
# code.  The script below will set the faces of the fonts for colored output.

usage() {
    echo "Usage: $(basename $0) <org-file> <path/to/html-file>"
}


compute_path() {
    local path=$1
    if [ "${path:0:1}" = "/" ]
    then    
	echo $path
    else
	echo $(pwd)/$path
    fi
}


export_the_file() {
    local org_file=$1
    local html_path=$(compute_path $2)

    emacs --batch --eval "(progn
     (require 'package)
     (package-initialize)
     (unless (package-installed-p 'htmlize)
       (setq package-archives
         '((\"melpa\" . \"http://stable.melpa.org/packages/\")))
       (package-refresh-contents)
       (package-install 'htmlize))
     (custom-set-faces 
       '(default                      ((t (:foreground \"#ffffff\" :background \"black\"))))
       '(font-lock-builtin-face       ((t (:foreground \"dark slate blue\"))))
       '(font-lock-comment-face       ((t (:foreground \"Firebrick\"))))
       '(font-lock-constant-face      ((t (:foreground \"dark cyan\"))))
       '(font-lock-function-name-face ((t (:foreground \"Blue1\"))))
       '(font-lock-keyword-face       ((t (:foreground \"Purple\"))))
       '(font-lock-string-face        ((t (:foreground \"VioletRed4\"))))
       '(font-lock-type-face          ((t (:foreground \"ForestGreen\"))))
       '(font-lock-variable-name-face ((t (:foreground \"sienna\"))))
       '(font-lock-warning-face       ((t (:foreground \"red\" :weight bold)))))
     (setq htmlize-use-rgb-map 'force)
     (require 'org)
     (require 'ob)
     (require 'htmlize)
     (setq make-backup-files nil)
     (find-file \"$org_file\")
     (org-html-export-as-html)
     (write-file \"$html_path\"))"
}

if [ $# = 2 ]
then
    export_the_file $*
else
    usage
    exit 1
fi