From 01e977f922ea29cd2994f96c18e4b3f033b1802d Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <koszko@koszko.org>
Date: Mon, 27 Dec 2021 16:55:28 +0100
Subject: facilitate egistering dynamic content scripts with mappings data

---
 compute_scripts.awk | 43 +++++++++++++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 10 deletions(-)

(limited to 'compute_scripts.awk')

diff --git a/compute_scripts.awk b/compute_scripts.awk
index 9edc56d..b778934 100755
--- a/compute_scripts.awk
+++ b/compute_scripts.awk
@@ -108,7 +108,8 @@ BEGIN {
 
 function process_file(path, read_path, mode,
 		      line, result, line_part, directive, directive_args,
-		      if_nesting, if_nesting_true, if_branch_processed) {
+		      if_nesting, if_nesting_true, if_branch_processed,
+		      additional_line_nr) {
     if (path in modes && modes[path] != mode) {
 	printf "ERROR: File %s used multiple times in different contexts\n",
 	    path > "/dev/stderr"
@@ -151,8 +152,13 @@ function process_file(path, read_path, mode,
 	    printf "ERROR: Could not read %s\n", read_path > "/dev/stderr"
 	    return 1
 	}
-	if (result == 0)
-	    break
+	if (result == 0) {
+	    if (path != js_to_amalgamate || \
+		additional_line_nr == additional_lines_count)
+		break
+
+	    line = amalgamation_additional_lines[++additional_line_nr]
+	}
 
 	if (line !~ /^#/) {
 	    if (if_nesting_true == if_nesting)
@@ -169,9 +175,15 @@ function process_file(path, read_path, mode,
 		return 1
 	    }
 	    if (result == 0) {
-		printf "ERROR: Unexpected EOF in %s\n",
-		    read_path > "/dev/stderr"
-		return 1
+		if (path == js_to_amalgamate && \
+		    additional_line_nr < additional_lines_count) {
+		    line_part = \
+			amalgamation_additional_lines[++additional_line_nr]
+		} else {
+		    printf "ERROR: Unexpected EOF in %s\n",
+			read_path > "/dev/stderr"
+		    return 1
+		}
 	    }
 
 	    line = line " " line_part
@@ -569,7 +581,7 @@ function print_amalgamation(js_deps, js_deps_count,
 }
 
 function print_usage() {
-    printf "USAGE: %s compute_scripts.awk -- [-D PREPROCESSOR_DEFINITION]... [-M manifest/to/process/manifest.json]... [-H html/to/process.html]... [-J js/to/process.js]... [--help|-h] [--output-dir=./build] [--write-js-deps] [--write-html-deps] [--output=files-to-copy|--output=amalgamate-js:js/to/process.js]\n",
+    printf "USAGE: %s compute_scripts.awk -- [-D PREPROCESSOR_DEFINITION]... [-M manifest/to/process/manifest.json]... [-H html/to/process.html]... [-J js/to/process.js]... [--help|-h] [--output-dir=./build] [--write-js-deps] [--write-html-deps] [--output=files-to-copy|--output=amalgamate-js:js/to/process.js[:additional-code]]\n",
 	ARGV[0] > "/dev/stderr"
 }
 
@@ -580,13 +592,16 @@ BEGIN {
     option_arg_patterns["J"] = path_re
 }
 
-function main(i, path, letter, dir, max_line_nr, js_deps, js_deps_count) {
+function main(i, path, letter, dir, max_line_nr, js_deps, js_deps_count,
+	      amalgamation_additional_code) {
     output_dir = "./build"
     write_js_deps = false
     write_html_deps = false
 
     output = ""
     js_to_amalgamate = ""
+    delete amalgamation_additional_lines[0]
+    additional_lines_count = 0
     delete main_js_lines[0]
 
     delete manifests_to_process[0]
@@ -629,13 +644,21 @@ function main(i, path, letter, dir, max_line_nr, js_deps, js_deps_count) {
 	    output = "files-to-copy"
 	} else if (ARGV[i] ~ /^--output=amalgamate-js:/) {
 	    output = "amalgamate-js"
-	    js_to_amalgamate = ARGV[i]
-	    sub(/^--output=amalgamate-js:/, "", js_to_amalgamate)
+	    amalgamation_additional_code = ARGV[i]
+	    sub(/^--output=amalgamate-js:/, "", amalgamation_additional_code)
+	    js_to_amalgamate = amalgamation_additional_code
+	    sub(/:.*$/, "", js_to_amalgamate)
 	    if (js_to_amalgamate !~ path_re) {
 		printf "ERROR: amalgamate-js path does not match '%s': %s\n",
 		    path_re, js_to_amalgamate > "/dev/stderr"
 		return 1
 	    }
+	    sub(/^[^:]+:?/, "", amalgamation_additional_code)
+	    if (amalgamation_additional_code) {
+		additional_lines_count = split(amalgamation_additional_code,
+					       amalgamation_additional_lines,
+					       "\n")
+	    }
 	} else {
 		printf "ERROR: Unknown option '%s'\n", ARGV[i] > "/dev/stderr"
 		print_usage()
-- 
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