emply an sh-based build system; make some changes to blocking

1 files changed, 289 insertions, 0 deletions

diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..efa53f5
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,289 @@
+#!/bin/sh
+
+# Copyright (C) 2021 Wojtek Kosior
+# Redistribution terms are gathered in the `copyright' file.
+
+ENDL="
+"
+
+errcho() {
+    echo "$@" >&2
+}
+
+map_set_instr() {
+    echo "$1__$2='$3'"
+}
+
+map_set() {
+    eval "$(map_set_instr "$@")"
+}
+
+map_get() {
+    eval "echo \"\$$1__$2\""
+}
+
+map_del_instr() {
+    echo "unset $1__$2"
+}
+
+map_del() {
+    eval "$(map_del_instr "$@")"
+}
+
+sanitize() {
+    echo "$1" | tr /.- _
+}
+
+handle_export_line() {
+    if [ "x$1" = "xEXPORTS_START" ]; then
+	if [ "$STATE" = "before_block" ]; then
+	    STATE="in_block"
+	fi
+    elif [ "x$1" = "xEXPORT" ]; then
+	if [ "$STATE" != "in_block" ]; then
+	    return
+	fi
+
+	EXPORTCODE="${EXPORTCODE}window.killtheweb.$2 = $2;$ENDL"
+
+	PREVIOUS_FILE="$(map_get EXPORTS $2)"
+	if [ "x$PREVIOUS_FILE" != "x" ]; then
+	    errcho "export $2 present in both $PREVIOUS_FILE and $FILE"
+	    return 1
+	fi
+
+	map_set_instr EXPORTS $2 "$FILE"
+
+    elif [ "x$1" = "xEXPORTS_END" ]; then
+	if [ "$STATE" = "in_block" ]; then
+	    STATE="after_block"
+	fi
+    fi
+}
+
+translate_exports() {
+    STATE="before_block"
+    EXPORTCODE=''
+
+    while read EXPORT_LINE; do
+	handle_export_line $EXPORT_LINE || return 1
+    done
+
+    map_set_instr EXPORTCODES $FILEKEY "$EXPORTCODE"
+}
+
+add_exports() {
+    FILE="$1"
+    FILEKEY="$(sanitize "$FILE")"
+
+    eval "$(grep -o 'EXPORT.\+' "$1" | translate_exports || exit 1)"
+}
+
+handle_import_line() {
+    if [ "x$1" = "xIMPORTS_START" ]; then
+	if [ "$STATE" = "before_block" ]; then
+	    STATE="in_block"
+	fi
+    elif [ "x$1" = "xIMPORT" ]; then
+	if [ "$STATE" != "in_block" ]; then
+	    return
+	fi
+
+	IMPORTCODE="${IMPORTCODE}const $2 = window.killtheweb.$2;$ENDL"
+
+	IMPORTS="$IMPORTS $2"
+
+    elif [ "x$1" = "xIMPORTS_END" ]; then
+	if [ "$STATE" = "in_block" ]; then
+	    STATE="after_block"
+	fi
+    fi
+}
+
+translate_imports() {
+    STATE="before_block"
+    IMPORTCODE=''
+    IMPORTS=''
+
+    while read IMPORT_LINE; do
+	handle_import_line $IMPORT_LINE || return 1
+    done
+
+    map_set_instr IMPORTCODES $FILEKEY "$IMPORTCODE"
+    map_set_instr IMPORTS $FILEKEY "$IMPORTS"
+}
+
+add_imports() {
+    FILE="$1"
+    FILEKEY="$(sanitize "$FILE")"
+
+    eval "$(grep -o 'IMPORT.\+' "$1" | translate_imports || exit 1)"
+}
+
+compute_scripts_list_rec() {
+    local FILE="$1"
+    local FILEKEY=$(sanitize "$1")
+
+    local FILESTATE="$(map_get FILESTATES $FILEKEY)"
+    if [ "xprocessed" = "x$FILESTATE" ]; then
+	return
+    fi
+    if [ "xprocessing" = "x$FILESTATE" ]; then
+	errcho "import loop on $FILE"
+	return 1
+    fi
+
+    USED="$USED $FILEKEY"
+
+    map_set FILESTATES $FILEKEY "processing"
+
+    local IMPORT
+    for IMPORT in $(map_get IMPORTS $FILEKEY); do
+	NEXT_FILE="$(map_get EXPORTS $IMPORT)"
+	if [ "x" = "x$NEXT_FILE" ]; then
+	    errcho "nothing exports $IMPORT, required by $FILE"
+	    return 1
+	fi
+	if ! compute_scripts_list_rec "$NEXT_FILE"; then
+	    errcho "when satisfying $IMPORT for $FILE"
+	    return 1
+	fi
+    done
+
+    echo $FILE
+    map_set FILESTATES $FILEKEY "processed"
+}
+
+compute_scripts_list() {
+    USED=''
+    echo COMPUTED_SCRIPTS=\"exports_init.js
+    compute_scripts_list_rec "$1"
+    echo \"
+
+    for FILEKEY in $USED; do
+	map_set_instr USED $FILEKEY yes
+    done
+}
+
+as_json_list() {
+    while true; do
+	if [ "x" = "x$2" ]; then
+	    echo -n '\\n'"\t\t\"$1\""'\\n\t'
+	    return
+	fi
+	echo -n '\\n'"\t\t\"$1\","
+	shift
+    done
+}
+
+as_html_list() {
+    while [ "x" != "x$1" ]; do
+	echo -n '\\n'"    <script src=\"/$1\"></script>"
+	shift
+    done
+}
+
+set_browser() {
+    if [ "x$1" = "xmozilla" -o "x$1" = "xchromium" ]; then
+	BROWSER="$1"
+    else
+	errcho "usage:  $0 mozilla|chromium"
+	exit 1
+    fi
+}
+
+main() {
+    set_browser "$1"
+
+    SCRIPTDIRS='background html common content'
+
+    SCRIPTS=$(find $SCRIPTDIRS -name '*.js')
+
+    for SCRIPT in $SCRIPTS; do
+	add_exports $SCRIPT
+	add_imports $SCRIPT
+    done
+
+    eval "$(compute_scripts_list background/main.js || exit 1)"
+    BGSCRIPTS="$(as_json_list $COMPUTED_SCRIPTS)"
+    eval "$(compute_scripts_list content/main.js || exit 1)"
+    CONTENTSCRIPTS="$(as_json_list $COMPUTED_SCRIPTS)"
+    eval "$(compute_scripts_list html/display-panel.js || exit 1)"
+    POPUPSCRIPTS="$(as_html_list $COMPUTED_SCRIPTS)"
+    eval "$(compute_scripts_list html/options_main.js || exit 1)"
+    OPTIONSSCRIPTS="$(as_html_list $COMPUTED_SCRIPTS)"
+
+    BUILDDIR=build_$BROWSER
+    rm -rf $BUILDDIR
+    mkdir $BUILDDIR
+    for DIR in $(find $SCRIPTDIRS -type d); do
+	mkdir -p $BUILDDIR/$DIR
+    done
+
+    CHROMIUM_KEY=''
+    GECKO_APPLICATIONS=''
+
+    if [ "$BROWSER" = "chromium" ]; then
+	CHROMIUM_KEY="\n\
+\n\
+    // WARNING!!!\n\
+    // EACH USER SHOULD REPLACE \"key\" WITH A UNIQUE VALUE!!!\n\
+    // OTHERWISE, SECURITY CAN BE TRIVIALLY COMPROMISED!\n\
+    //\n\
+    // A unique key can be generated with:\n\
+    // $ ssh-keygen -f /path/to/new/key.pem -t rsa -b 1024\n\
+    //\n\
+    // Only relevant to users of chrome-based browsers.\n\
+    // Users of Firefox forks are safe.\n\
+\n\
+    \"key\": \"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\","
+    else
+	GECKO_APPLICATIONS="\n\
+    \"applications\": {\n\
+	\"gecko\": {\n\
+	    \"id\": \"{6fe13369-88e9-440f-b837-5012fb3bedec}\",\n\
+	    \"strict_min_version\": \"60.0\"\n\
+	}\n\
+    },"
+    fi
+
+    sed "\
+s^_GECKO_APPLICATIONS_^$GECKO_APPLICATIONS^
+s^_CHROMIUM_KEY_^$CHROMIUM_KEY^
+s^_BGSCRIPTS_^$BGSCRIPTS^
+s^_CONTENTSCRIPTS_^$CONTENTSCRIPTS^" \
+	< manifest.json > $BUILDDIR/manifest.json
+
+    sed "s^_POPUPSCRIPTS_^$POPUPSCRIPTS^" \
+	< html/display-panel.html > $BUILDDIR/html/display-panel.html
+
+    sed "s^_OPTIONSSCRIPTS_^$OPTIONSSCRIPTS^" \
+	< html/options.html > $BUILDDIR/html/options.html
+
+    for FILE in $SCRIPTS; do
+	FILEKEY=$(sanitize "$FILE")
+	if [ "xyes" != "x$(map_get USED $FILEKEY)" ]; then
+	    errcho "WARNING! $FILE not used"
+	else
+	    (echo "\
+\"use strict\";
+
+(() => {
+$(map_get IMPORTCODES $FILEKEY)
+
+"; cat $FILE; echo "
+
+$(map_get EXPORTCODES $FILEKEY)
+})();") > $BUILDDIR/$FILE
+	fi
+    done
+
+    echo "\
+window.killtheweb={};
+window.browser = this.browser; /* fix for stupid Firefox */
+" > $BUILDDIR/exports_init.js
+
+    cp -r icons/ copyright licenses/ $BUILDDIR
+}
+
+main "$@"