#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-#
#> Makefile
#>
#> Build a Gemini site
#>
#> This Makefile manages the building and publishing of the Gemini site:
#>   1. Delegating content directories to other makefiles
#>   2. Building the site index page
#>   3. Copying the site to the hosting location
#>
#> Run `make -f environment.mk show' to display the key global varibles.
#>
#
# © 2023 Andrew Stryker <axs@sdf.org>
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#-----------------------------------------------------------------------------#
#
# Configuation
#
#-----------------------------------------------------------------------------#

# Record the name of this Makefile
self ::= $(lastword ${MAKEFILE_LIST})

# Define the Makefiles
env_make ::= environment.mk
curate_make ::= curate.mk
index_make ::= index.mk

# load environment variables
include ${env_make}

# build lists of content directories
# TODO: do we need the quoted variables?
CURATE ?= about stuff
curate_dirs ::= $(addprefix ${CONTENT}/, ${CURATE})
#curate_quoted ::= $(shell echo ${curate} | sed -e "s/ /, /g")

INDEX ?= posts staff
index_dirs ::= $(addprefix ${CONTENT}/, ${INDEX})
#index_quoted ::= $(shell echo ${index} | sed -e "s/ /, /g")

# files that this file builds directly
banner_template ::= ${CONTENT}/banner.gmi.m4
banner ::= ${WORKING}/banner.gmi

site_index_template ::= ${CONTENT}/index.gmi.m4
site_index ::= ${STAGING}/index.gmi

BUILD_DATE_MSG ::= This page was built on $$(date).
export BUILD_DATE_MSG

#-----------------------------------------------------------------------------#
#
# User interface
#
#> User facing targets:
#>
#-----------------------------------------------------------------------------#

.PHONY: default all configure build publish help clean about posts show test

default: all # make the default target explicit

all: build # follow convention of using `all` as the default target

configure: #> Configure the site
	@bash configure

build: ${site_index} #> Build the site (default)
	@echo Built local site in this directory: ${STAGING}

publish: #> Publish Gemini files to site
	@# rsync options:
	@#   verbose: show each operation
	@#   links:   preserve symlinks
	@#   times:   preserve modification times
	@#   delete:  delete extraneous files, i.e., files on destination
	@#   chmod:   set permsions
	@echo Publishing in ${STAGING} to ${GEMINI_SITE}
	@rsync \
	  --verbose \
	  --recursive \
	  --links \
	  --times \
	  --delete \
	  --chmod=D755,F644 \
	  ${STAGING} \
	  ${GEMINI_SITE}
	@echo "\t✓ Publising complete"
	@echo "\nThe site should be available on ${GEMINI_URL}"

show: #> Display key variables
	@echo "Key variables defined in ${self}:"
	@echo
	@echo "Gemini site .................................. ${GEMINI_SITE}"
	@echo "Genini site URL .............................. ${GEMINI_URL}"
	@echo
	@echo "\tSite index template ........................ ${site_index_template}"
	@echo "\tBanner template ............................ ${banner_template}"
	@echo
	@echo "\tCurated content directories:"
	@echo "\t\t${curate}"
	@echo
	@echo "\tDynamically indexed content directories:"
	@echo "\t\t${index}"
	@echo
	@echo "Build message: ${BUILD_DATE_MSG}"
	@${MAKE} -f ${env_make}
	@echo
	@${MAKE} -f ${curate_make} show
	@echo
	@#${MAKE} -f ${index_make} show
	@#echo
	@#cd tests && ${MAKE} show

clean: #> Delete generated files
	@rm -rf ${WORKING} ${STAGING}
	@echo "✓ Deleted all intermediate and generated files"
	@cd tests && ${MAKE} clean

test: #> Run the test suite
	@cd tests && ${MAKE} test

help: #> Display this help message
	@awk -f ${AWKHELP} ${self}

#-----------------------------------------------------------------------------#
#
# File system interface
#
#-----------------------------------------------------------------------------#

${banner}: ${banner_template}
	@mkdir -p ${WORKING}
	@m4 --include=${MAKO_DIR} $< > $@
	@echo "\t✓ Generated site banner"

${site_index}: ${site_index_template} ${banner} ${curate_dirs} ${index_dirs}
	@mkdir -p ${STAGING}
	@m4 --include=${MAKO_DIR} --define=WORKING=${WORKING} $< > $@
	@echo ${BUILD_DATE_MSG} >> $@
	@echo "\t✓ Generated site index file"

${curate_dirs}: %:
	@echo
	@echo "Entering section: $@"
	@echo
	@${MAKE} -C $@ -f ${CURATE_MAKE} build
	@echo "✓ Completed $@ section"

${index_dirs}: %:
	@echo
	@echo "Entering section: $@"
	@echo
	@cd ${CONTENT}/$@ && ${MAKE} -f ${index_make} build
	@echo "✓ Completed $@ section"

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