tools: allow for passing arbitrary compiler flags to v bug, for exa…

…mple: `v bug -cg -autofree file.v` (vlang#23335)

cmd/tools/vbug.v

@@ -1,72 +1,88 @@
-import net.urllib
 import os
+import term
 import readline
+import net.urllib
 
-const vroot = @VMODROOT
+fn elog(msg string) {
+	eprintln(term.ecolorize(term.gray, msg))
+}
+
+fn olog(msg string) {
+	println(term.colorize(term.green, msg))
+}
 
 // get output from `v doctor`
 fn get_vdoctor_output(is_verbose bool) string {
 	vexe := os.getenv('VEXE')
 	verbose_flag := if is_verbose { '-v' } else { '' }
 	result := os.execute('${os.quoted_path(vexe)} ${verbose_flag} doctor')
 	if result.exit_code != 0 {
-		eprintln('unable to get `v doctor` output: ${result.output}')
+		elog('> unable to get `v doctor` output: ${result.output}')
 		return ''
 	}
 	return result.output
 }
 
-// get output from `./v -g -o vdbg cmd/v && ./vdbg file.v`
-fn get_v_build_output(is_verbose bool, is_yes bool, file_path string) string {
+fn runv(label string, user_cmd string) os.Result {
+	mut result := os.Result{}
+	elog('> ${label} using: ${term.ecolorize(term.magenta, user_cmd)}')
+	result = os.execute(user_cmd)
+	print(result.output)
+	return result
+}
+
+// get output from `./v -g -o vdbg cmd/v && ./vdbg -user_args run file.v`
+fn get_v_build_output(is_verbose bool, is_yes bool, file_path string, user_args string, generated_file string) string {
+	mut result := os.Result{}
 	mut vexe := os.getenv('VEXE')
+
 	// prepare a V compiler with -g to have better backtraces if possible
 	wd := os.getwd()
+	vroot := @VMODROOT
 	os.chdir(vroot) or {}
 	verbose_flag := if is_verbose { '-v' } else { '' }
 	vdbg_path := $if windows { '${vroot}/vdbg.exe' } $else { '${vroot}/vdbg' }
 	vdbg_compilation_cmd := '${os.quoted_path(vexe)} ${verbose_flag} -g -o ${os.quoted_path(vdbg_path)} cmd/v'
-	vdbg_result := os.execute(vdbg_compilation_cmd)
+	result = runv('Prepare vdbg', vdbg_compilation_cmd)
 	os.chdir(wd) or {}
-	if vdbg_result.exit_code == 0 {
+
+	if result.exit_code == 0 {
 		vexe = vdbg_path
 	} else {
-		eprintln('unable to compile V in debug mode: ${vdbg_result.output}\ncommand: ${vdbg_compilation_cmd}\n')
+		elog('> unable to compile V in debug mode: ${result.output}\ncommand: ${vdbg_compilation_cmd}\n')
 	}
 
-	mut result := os.execute('${os.quoted_path(vexe)} ${verbose_flag} ${os.quoted_path(file_path)}')
+	result = runv('Compile', '${os.quoted_path(vexe)} ${verbose_flag} ${user_args} ${os.quoted_path(file_path)}')
 	defer {
 		os.rm(vdbg_path) or {
 			if is_verbose {
-				eprintln('unable to delete `vdbg`: ${err}')
+				elog('> unable to delete `vdbg`: ${err}')
 			}
 		}
 	}
 	if result.exit_code == 0 {
 		defer {
-			mut generated_file := file_path.all_before_last('.')
-			$if windows {
-				generated_file += '.exe'
-			}
 			os.rm(generated_file) or {
 				if is_verbose {
-					eprintln('unable to delete generated file: ${err}')
+					elog('> unable to delete generated file: ${err}')
 				}
 			}
 		}
 		run := is_yes
 			|| ask('It looks like the compilation went well, do you want to run the file?')
 		if run {
-			result = os.execute('${os.quoted_path(vexe)} ${verbose_flag} run ${os.quoted_path(file_path)}')
+			result = runv('Run', generated_file)
 			if result.exit_code == 0 && !is_yes {
-				confirm_or_exit('It looks like the file ran correctly as well, are you sure you want to continue?')
+				elog('> The file ran correctly as well.')
+				confirm_or_exit('Are you sure you want to continue?')
 			}
 		}
 	}
 	return result.output
 }
 
 fn ask(msg string) bool {
-	prompt := os.input_opt('${msg} [Y/n] ') or { 'y' }
+	prompt := os.input_opt(term.colorize(term.bright_white, '${msg} [Y/n] ')) or { 'y' }
 	return prompt == '' || prompt[0].ascii_str().to_lower() != 'n'
 }
 
@@ -77,59 +93,68 @@ fn confirm_or_exit(msg string) {
 }
 
 fn main() {
+	unbuffer_stdout()
+	mut compiler_args := []string{}
 	mut file_path := ''
-	mut is_verbose := false
-	mut is_yes := false
-	for arg in os.args[2..] {
-		match arg {
-			'-v' {
-				is_verbose = true
-			}
-			'-y' {
-				is_yes = true
+	is_verbose := '-v' in os.args
+	is_yes := '-y' in os.args
+
+	for arg in os.args[1..] {
+		if arg == 'bug' {
+			continue
+		}
+		if arg.ends_with('.v') || arg.ends_with('.vsh') || arg.ends_with('.vv') {
+			if file_path != '' {
+				elog('> v bug: only one V file can be submitted')
+				exit(1)
 			}
-			else {
-				if !arg.ends_with('.v') && !arg.ends_with('.vsh') && !arg.ends_with('.vv') {
-					eprintln('unknown argument: `${arg}`')
-					exit(1)
-				}
-				if file_path != '' {
-					eprintln('only one V file can be submitted')
-					exit(1)
-				}
-				file_path = arg
+			file_path = arg
+		} else {
+			if arg !in ['-y', '-v'] {
+				compiler_args << arg
 			}
 		}
 	}
+
 	if file_path == '' {
-		eprintln('v bug: no v file listed to report')
+		elog('> v bug: no v file listed to report')
 		exit(1)
 	}
+
 	os.unsetenv('VCOLORS')
 	// collect error information
 	// output from `v doctor`
 	vdoctor_output := get_vdoctor_output(is_verbose)
 	// file content
 	file_content := os.read_file(file_path) or {
-		eprintln('unable to get file "${file_path}" content: ${err}')
+		elog('> unable to get file "${file_path}" content: ${err}')
 		''
 	}
-	// output from `./v -g -o vdbg cmd/v && ./vdbg file.v`
-	build_output := get_v_build_output(is_verbose, is_yes, file_path)
+
+	user_args := compiler_args.join(' ')
+	mut generated_file := file_path.all_before_last('.')
+	if os.user_os() == 'windows' {
+		generated_file += '.exe'
+	}
+	build_output := get_v_build_output(is_verbose, is_yes, file_path, user_args, generated_file)
+
 	// ask the user if he wants to submit even after an error
 	if !is_yes && (vdoctor_output == '' || file_content == '' || build_output == '') {
-		confirm_or_exit('An error occurred retrieving the information, do you want to continue?')
+		elog('> Error while retrieving the information.')
+		confirm_or_exit('Do you want to continue?')
 	}
 
 	expected_result := readline.read_line('What did you expect to see? ') or {
 		// Ctrl-C was pressed
-		eprintln('\nCanceled')
+		elog('\nCanceled')
 		exit(1)
 	}
 	// open prefilled issue creation page, or print link as a fallback
 
 	if !is_yes && vdoctor_output.contains('behind V master') {
-		confirm_or_exit('It looks like your installation of V is outdated, we advise you to run `v up` before submitting an issue. Are you sure you want to continue?')
+		olog('> It looks like your installation of V is outdated.')
+		olog('> We advise you to run `v up` before submitting an issue.')
+		confirm_or_exit('Are you sure you want to continue?')
 	}
 
 	// When updating this template, make sure to update `.github/ISSUE_TEMPLATE/bug_report.md` too
@@ -140,30 +165,33 @@ ${vdoctor_output}
 ```
 
 **What did you do?**
-`./v -g -o vdbg cmd/v && ./vdbg ${file_path}`
+`./v -g -o vdbg cmd/v && ./vdbg ${user_args} ${file_path} && ${generated_file}`
 {file_content}
 
+**What did you see instead?**
+```
+${build_output}```
+
 **What did you expect to see?**
 
 ${expected_result}
 
-**What did you see instead?**
-```
-${build_output}```'
+'
 	mut encoded_body := urllib.query_escape(raw_body.replace_once('{file_content}', '```v\n${file_content}\n```'))
 	mut generated_uri := 'https://github.com/vlang/v/issues/new?labels=Bug&body=${encoded_body}'
 	if generated_uri.len > 8192 {
 		// GitHub doesn't support URLs longer than 8192 characters
 		encoded_body = urllib.query_escape(raw_body.replace_once('{file_content}', 'See attached file `${file_path}`'))
 		generated_uri = 'https://github.com/vlang/v/issues/new?labels=Bug&body=${encoded_body}'
-		println('Your file is too big to be submitted. Head over to the following URL and attach your file.')
-		println(generated_uri)
+		elog('> Your file is too big to be submitted.')
+		elog('> Go to the following URL, and attach your file:')
+		olog(generated_uri)
 	} else {
 		os.open_uri(generated_uri) or {
 			if is_verbose {
-				eprintln(err)
+				elog(err.str())
 			}
-			println(generated_uri)
+			olog(generated_uri)
 		}
 	}
 }