Summary:
========
I would like to be able to set =:html-htmlize-output-type= on a
per-project basis. That does not seem to be working. If I have
~htmlize.el~ installed and set =:html-htmlize-output-type css=, then I
get hardcoded values for the colours being used in the code blocks. If
I don't have ~htmlize.el~ installed, I get plain text. To get CSS class
names, I have to do an explicit =(setq org-html-htmlize-output-type
'css)= which effects all publishing projects.

1. What exactly did you do?

I set =:html-htmlize-output-type css= in the _blog-non-prod_ project.
I also set =:html-htmlize-output-type 'css= and then tried both values
with =htmlize-output-type= as well.

2. What did you expect to happen?

I was expecting that the generated HTML would have code blocks with
class names in the CSS so that I could apply the CSS I wanted. A sample
of what I was expecting:

<div class="org-src-container">
<pre class="src src-C">#include <stdio.h>
#include <iso646.h>

int main()
{
int i = 0;
int limit = 1000 ;
int total_sum = 0 ;

printf("Project Euler in C: \n");

while ( i < limit )
{

if ( ((i % 3) == 0) || ((i % 5) == 0) )
{
total_sum += i;
}

i++ ;
}

printf("\tAnswer 1: %d \n", total_sum);

return (0) ;
}
</pre>
</div>

3. What happened instead?
Instead all the styles had the colour hardcoded in the code blocks if
~htmlize~ package was installed. Otherwise everything was generated as
plain text and put inside =<pre>...</pre>= tags and have no style to
them.

e.g.:

hardcoded style:
================
<div class="org-src-container">
<pre class="src src-C">#include <stdio.h>
#include <iso646.h>

int main()
{
int i = 0;
int limit = 1000 ;
int total_sum = 0 ;

printf("Project Euler in C: \n");

while ( i < limit )
{

if ( ((i % 3) == 0) || ((i % 5) == 0) )
{
total_sum += i;
}

i++ ;
}

printf("\tAnswer 1: %d \n", total_sum);

return (0) ;
}
</pre>
</div>

plain text:
===========
<div class="org-src-container">
<pre class="src src-C">#include <stdio.h>
#include <iso646.h>

int main()
{
int i = 0;
int limit = 1000 ;
int total_sum = 0 ;

printf("Project Euler in C: \n");

while ( i < limit )
{

if ( ((i % 3) == 0) || ((i % 5) == 0) )
{
total_sum += i;
}

i++ ;
}

printf("\tAnswer 1: %d \n", total_sum);

return (0) ;
}
</pre>
</div>

emacs startup:
==============
tcsh% emacs --init-directory ~/.emacs.d/emacs-init-testing

versions:
=========
Emacs : GNU Emacs 29.3 (build 1, amd64-portbld-freebsd13.2)
Package: Org mode version 9.6.15 (release_9.6.15 @ /usr/local/share/emacs/29.3/lisp/org/)

current state:
==============
(setq
org-link-elisp-confirm-function 'yes-or-no-p
org-bibtex-headline-format-function #[257 "\300 \236A\207" [:title] 3 "\n\n(fn ENTRY)"]
org-publish-project-alist '(("blog-non-prod" :base-directory "~/org/personal-web-site/" :base-extension "org" :publishing-directory
"~/www/np/" :publishing-function org-html-publish-to-html :recursive t :exclude "level-.*\\|.*.draft.org\\|.*~"
:section-numbers nil :with-toc nil :with-sub-superscript nil :with-author nil :with-date t :with-drawers t
:auto-sitemap nil :html-use-infojs nil :htmlize-output-type css)
("assets" :base-directory "~/org/assets/" :base-extension
"css\\|js\\|png\\|jpg\\|jpeg\\|svg\\|gif\\|pdf\\|mp3\\|mp4\\|ogg\\|webm\\|webp" :publishing-directory "~/www/"
:recursive t :publishing-function org-publish-attachment)
("personal-non-prod" :components ("blog-non-prod" "assets")))
org-persist-after-read-hook '(org-element--cache-persist-after-read)
org-export-before-parsing-hook '(org-attach-expand-links)
org-cycle-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
org-archive-hook '(org-attach-archive-delete-maybe)
org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function
org-ascii-format-drawer-function #[771 " \207" [] 4 "\n\n(fn NAME CONTENTS WIDTH)"]
org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines org-cycle-optimize-window-after-visibility-change
org-cycle-display-inline-images)
org-persist-before-read-hook '(org-element--cache-persist-before-read)
org-mode-hook '(#[0 "\301\211 \207" [imenu-create-index-function org-imenu-get-tree] 2]
#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-fold-show-all append local] 5]
#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-babel-show-result-all append local] 5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
org-babel-load-languages '((awk . t) (C . t) (calc . t) (css . t) (dot . t) (emacs-lisp . t) (forth . t) (fortran . t) (gnuplot . t)
(groovy . t) (haskell . t) (java . t) (js . t) (latex . t) (lisp . t) (makefile . t) (ocaml . t) (octave . t)
(org . t) (perl . t) (python . t) (R . t) (ruby . t) (scheme . t) (sed . t) (shell . t) (sql . t) (sqlite . t)
(table . t))
org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
org-latex-format-headline-function 'org-latex-format-headline-default-function
org-confirm-shell-link-function 'yes-or-no-p
org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
outline-isearch-open-invisible-function 'outline-isearch-open-invisible
org-odt-format-headline-function 'org-odt-format-headline-default-function
org-agenda-before-write-hook '(org-agenda-add-entry-text)
org-babel-tangle-lang-exts '(("sed" . "sed") ("ruby" . "rb") ("python" . "py") ("perl" . "pl") ("ocaml" . "ml") ("lisp" . "lisp")
("latex" . "tex") ("java" . "java") ("haskell" . "hs") ("groovy" . "groovy") ("fortran" . "F90") ("D" . "d")
("C++" . "cpp") ("awk" . "awk") ("emacs-lisp" . "el") ("elisp" . "el"))
org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)
org-html-htmlize-output-type 'css
org-confirm-elisp-link-function 'yes-or-no-p
org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate)
org-html-format-inlinetask-function 'org-html-format-inlinetask-default-function
org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
org-fold-core-isearch-open-function 'org-fold--isearch-reveal
org-latex-format-inlinetask-function 'org-latex-format-inlinetask-default-function
org-persist-before-write-hook '(org-element--cache-persist-before-write)
org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
org-link-shell-confirm-function 'yes-or-no-p
org-babel-pre-tangle-hook '(save-buffer)
org-agenda-loop-over-headlines-in-active-region nil
org-occur-hook '(org-first-headline-recenter)
org-metadown-hook '(org-babel-pop-to-session-maybe)
org-link-parameters '(("attachment" :follow org-attach-follow :complete org-attach-complete-link) ("id" :follow org-id-open)
("eww" :follow org-eww-open :store org-eww-store-link) ("rmail" :follow org-rmail-open :store org-rmail-store-link)
("mhe" :follow org-mhe-open :store org-mhe-store-link)
("irc" :follow org-irc-visit :store org-irc-store-link :export org-irc-export)
("info" :follow org-info-open :export org-info-export :store org-info-store-link :insert-description
org-info-description-as-command)
("gnus" :follow org-gnus-open :store org-gnus-store-link)
("docview" :follow org-docview-open :export org-docview-export :store org-docview-store-link)
("bibtex" :follow org-bibtex-open :store org-bibtex-store-link)
("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete org-bbdb-complete-link :store org-bbdb-store-link)
("w3m" :store org-w3m-store-link) ("doi" :follow org-link-doi-open :export org-link-doi-export) ("file+sys")
("file+emacs") ("shell" :follow org-link--open-shell)
("news" :follow #[514 "\301\300\302 Q \"\207" ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"])
("mailto" :follow #[514 "\301\300\302 Q \"\207" ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"])
("https" :follow #[514 "\301\300\302 Q \"\207" ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"])
("http" :follow #[514 "\301\300\302 Q \"\207" ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"])
("ftp" :follow #[514 "\301\300\302 Q \"\207" ["ftp" browse-url ":"] 6 "\n\n(fn URL ARG)"])
("help" :follow org-link--open-help :store org-link--store-help) ("file" :complete org-link-complete-file)
("elisp" :follow org-link--open-elisp))
org-html-format-headline-function 'org-html-format-headline-default-function
org-metaup-hook '(org-babel-load-in-session-maybe)
)

~/.emacs.d/emacs-init-testing/init.el:
======================================

;; to show which init.el is being used
(defvar ksi/emacs-init-testing t)

;; indentation will insert tabs if non-nil.
;; so if you want spaces, keep this nil, as you should have done
;; by default anyway. TABS ARE EVIL !!
(setq-default indent-tabs-mode nil)

;; most programming modes that are derived from CC-Mode use this
;; to control the indentation setting. C/C++/ObjC/Java
(setq c-default-style '((java-mode . "java")
(awk-mode . "awk")
(c-mode . "k&r")
(c++-mode . "stroustrup")
(other . "gnu")))
(setq c-tab-always-indent t)

;; if you want the braces to NOT be on the same line, you want to
;; set the below to non-nil
(setq c-auto-newline nil)

;; groovy indentation
;; default: 4
(setq groovy-indent-offset 4)

;;;; GnuTLS settings as they might affect package.el
;;;
;;; priority strings can be set according to
;;; https://www.gnutls.org/manual/html_node/Priority-Strings.html
(setq gnutls-algorithm-priority nil) ;; this is the default
;;; temporary solution to work around a bug with GnuTLS handling TLS1.3
;;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34341
(setq gnutls-algorithm-priority "NONE:+SECURE256:!VERS-ALL:+VERS-TLS1.2:!VERS-TLS1.3")

;;;;
;;;; packages
;;;;
;; All package setup occurrs between the (require 'package) and
;; the (package-initialize)
;;
(require 'package)
(setq package-archives nil)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(add-to-list 'package-archives '("gnu" . "https://elpa.gnu.org/packages/"))
(package-initialize)

;; Bootstrap `use-package'
(unless (package-installed-p 'use-package)
(package-refresh-contents)
(package-install 'use-package))

;; since we're going to set some variables for use-package
;; we have to require use-package
(require 'use-package)
(setq use-package-verbose t
use-package-always-ensure t)

;; htmlize
(use-package htmlize
:ensure t
:init
(setq htmlize-output-type 'css)
)

;; smartparens -- this combines autopair and a bunch of others into one package.
(use-package smartparens
:ensure t
:hook (prog-mode . smartparens-mode)
:config
(require 'smartparens-config)
(smartparens-global-mode t)
(show-smartparens-global-mode t))

(use-package which-key
:ensure t
:init
(which-key-mode)
:diminish which-key-mode
:config
(setq which-key-idle-delay 0.3))

(load (concat user-emacs-directory "org-publishing-tutorial.el") t)

(setq custom-file (concat user-emacs-directory "ksi-custom-file.el"))
(load custom-file t)

(add-to-list 'term-file-aliases
'("dumb" . "xterm-256color"))

(load-theme 'deeper-blue)

;;; init.el ends here

~/.emacs.d/emacs-init-testing/ksi-custom-file.el:
=================================================
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(package-selected-packages '(which-key smartparens)))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)

Mehul N. Sanghvi
email: mehul.sanghvi@gmail.com