From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/cmd/tools/vrepl.v | 390 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 390 insertions(+)
 create mode 100644 v_windows/v/cmd/tools/vrepl.v

(limited to 'v_windows/v/cmd/tools/vrepl.v')

diff --git a/v_windows/v/cmd/tools/vrepl.v b/v_windows/v/cmd/tools/vrepl.v
new file mode 100644
index 0000000..701d453
--- /dev/null
+++ b/v_windows/v/cmd/tools/vrepl.v
@@ -0,0 +1,390 @@
+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module main
+
+import os
+import term
+import rand
+import readline
+import os.cmdline
+import v.util.version
+
+struct Repl {
+mut:
+	readline readline.Readline
+	indent   int    // indentation level
+	in_func  bool   // are we inside a new custom user function
+	line     string // the current line entered by the user
+	//
+	modules        []string // all the import modules
+	includes       []string // all the #include statements
+	functions      []string // all the user function declarations
+	functions_name []string // all the user function names
+	lines          []string // all the other lines/statements
+	temp_lines     []string // all the temporary expressions/printlns
+	vstartup_lines []string // lines in the `VSTARTUP` file
+}
+
+const is_stdin_a_pipe = (os.is_atty(0) == 0)
+
+const vexe = os.getenv('VEXE')
+
+const vstartup = os.getenv('VSTARTUP')
+
+fn new_repl() Repl {
+	return Repl{
+		readline: readline.Readline{}
+		modules: ['os', 'time', 'math']
+		vstartup_lines: os.read_file(vstartup) or { '' }.trim_right('\n\r').split_into_lines()
+	}
+}
+
+fn (mut r Repl) checks() bool {
+	mut in_string := false
+	was_indent := r.indent > 0
+	for i := 0; i < r.line.len; i++ {
+		if r.line[i] == `'` && (i == 0 || r.line[i - 1] != `\\`) {
+			in_string = !in_string
+		}
+		if r.line[i] == `{` && !in_string {
+			r.line = r.line[..i + 1] + '\n' + r.line[i + 1..]
+			i++
+			r.indent++
+		}
+		if r.line[i] == `}` && !in_string {
+			r.line = r.line[..i] + '\n' + r.line[i..]
+			i++
+			r.indent--
+			if r.indent == 0 {
+				r.in_func = false
+			}
+		}
+		if i + 2 < r.line.len && r.indent == 0 && r.line[i + 1] == `f` && r.line[i + 2] == `n` {
+			r.in_func = true
+		}
+	}
+	return r.in_func || (was_indent && r.indent <= 0) || r.indent > 0
+}
+
+fn (r &Repl) function_call(line string) bool {
+	for function in r.functions_name {
+		is_function_definition := line.replace(' ', '').starts_with('$function:=')
+		if line.starts_with(function) && !is_function_definition {
+			return true
+		}
+	}
+	return false
+}
+
+fn (r &Repl) current_source_code(should_add_temp_lines bool, not_add_print bool) string {
+	mut all_lines := []string{}
+	for mod in r.modules {
+		all_lines << 'import $mod\n'
+	}
+	if vstartup != '' {
+		mut lines := []string{}
+		if !not_add_print {
+			lines = r.vstartup_lines.filter(!it.starts_with('print'))
+		} else {
+			lines = r.vstartup_lines
+		}
+		all_lines << lines
+	}
+	all_lines << r.includes
+	all_lines << r.functions
+	all_lines << r.lines
+
+	if should_add_temp_lines {
+		all_lines << r.temp_lines
+	}
+	return all_lines.join('\n')
+}
+
+fn repl_help() {
+	println(version.full_v_version(false))
+	println('
+	|help                   Displays this information.
+	|list                   Show the program so far.
+	|reset                  Clears the accumulated program, so you can start a fresh.
+	|Ctrl-C, Ctrl-D, exit   Exits the REPL.
+	|clear                  Clears the screen.
+'.strip_margin())
+}
+
+fn run_repl(workdir string, vrepl_prefix string) {
+	if !is_stdin_a_pipe {
+		println(version.full_v_version(false))
+		println('Use Ctrl-C or ${term.highlight_command('exit')} to exit, or ${term.highlight_command('help')} to see other available commands')
+	}
+
+	if vstartup != '' {
+		result := repl_run_vfile(vstartup) or {
+			os.Result{
+				output: '$vstartup file not found'
+			}
+		}
+		print('\n')
+		print_output(result)
+	}
+
+	file := os.join_path(workdir, '.${vrepl_prefix}vrepl.v')
+	temp_file := os.join_path(workdir, '.${vrepl_prefix}vrepl_temp.v')
+	mut prompt := '>>> '
+	defer {
+		if !is_stdin_a_pipe {
+			println('')
+		}
+		cleanup_files([file, temp_file])
+	}
+	mut r := new_repl()
+	for {
+		if r.indent == 0 {
+			prompt = '>>> '
+		} else {
+			prompt = '... '
+		}
+		oline := r.get_one_line(prompt) or { break }
+		line := oline.trim_space()
+		if line == '' && oline.ends_with('\n') {
+			continue
+		}
+		if line.len <= -1 || line == '' || line == 'exit' {
+			break
+		}
+		r.line = line
+		if r.line == '\n' {
+			continue
+		}
+		if r.line == 'clear' {
+			term.erase_clear()
+			continue
+		}
+		if r.line == 'help' {
+			repl_help()
+			continue
+		}
+		if r.line.contains(':=') && r.line.contains('fn(') {
+			r.in_func = true
+			r.functions_name << r.line.all_before(':= fn(').trim_space()
+		}
+		if r.line.starts_with('fn') {
+			r.in_func = true
+			r.functions_name << r.line.all_after('fn').all_before('(').trim_space()
+		}
+		was_func := r.in_func
+		if r.checks() {
+			for rline in r.line.split('\n') {
+				if r.in_func || was_func {
+					r.functions << rline
+				} else {
+					r.temp_lines << rline
+				}
+			}
+			if r.indent > 0 {
+				continue
+			}
+			r.line = ''
+		}
+		if r.line == 'debug_repl' {
+			eprintln('repl: $r')
+			continue
+		}
+		if r.line == 'reset' {
+			r = new_repl()
+			continue
+		}
+		if r.line == 'list' {
+			source_code := r.current_source_code(true, true)
+			println('//////////////////////////////////////////////////////////////////////////////////////')
+			println(source_code)
+			println('//////////////////////////////////////////////////////////////////////////////////////')
+			continue
+		}
+		// Save the source only if the user is printing something,
+		// but don't add this print call to the `lines` array,
+		// so that it doesn't get called during the next print.
+		if r.line.starts_with('=') {
+			r.line = 'println(' + r.line[1..] + ')'
+		}
+		if r.line.starts_with('print') {
+			source_code := r.current_source_code(false, false) + '\n$r.line\n'
+			os.write_file(file, source_code) or { panic(err) }
+			s := repl_run_vfile(file) or { return }
+			print_output(s)
+		} else {
+			mut temp_line := r.line
+			mut temp_flag := false
+			func_call := r.function_call(r.line)
+			filter_line := r.line.replace(r.line.find_between("'", "'"), '').replace(r.line.find_between('"',
+				'"'), '')
+			possible_statement_patterns := [
+				'++',
+				'--',
+				'<<',
+				'//',
+				'/*',
+				'fn ',
+				'pub ',
+				'mut ',
+				'enum ',
+				'const ',
+				'struct ',
+				'interface ',
+				'import ',
+				'#include ',
+				'for ',
+				'or ',
+				'insert',
+				'delete',
+				'prepend',
+				'sort',
+				'clear',
+				'trim',
+			]
+			mut is_statement := false
+			if filter_line.count('=') % 2 == 1 {
+				is_statement = true
+			} else {
+				for pattern in possible_statement_patterns {
+					if filter_line.contains(pattern) {
+						is_statement = true
+						break
+					}
+				}
+			}
+			// NB: starting a line with 2 spaces escapes the println heuristic
+			if oline.starts_with('  ') {
+				is_statement = true
+			}
+			if !is_statement && !func_call && r.line != '' {
+				temp_line = 'println($r.line)'
+				temp_flag = true
+			}
+			mut temp_source_code := ''
+			if temp_line.starts_with('import ') {
+				mod := r.line.fields()[1]
+				if mod !in r.modules {
+					temp_source_code = '$temp_line\n' + r.current_source_code(false, true)
+				}
+			} else if temp_line.starts_with('#include ') {
+				temp_source_code = '$temp_line\n' + r.current_source_code(false, false)
+			} else {
+				for i, l in r.lines {
+					if (l.starts_with('for ') || l.starts_with('if ')) && l.contains('println') {
+						r.lines.delete(i)
+						break
+					}
+				}
+				temp_source_code = r.current_source_code(true, false) + '\n$temp_line\n'
+			}
+			os.write_file(temp_file, temp_source_code) or { panic(err) }
+			s := repl_run_vfile(temp_file) or { return }
+			if !func_call && s.exit_code == 0 && !temp_flag {
+				for r.temp_lines.len > 0 {
+					if !r.temp_lines[0].starts_with('print') {
+						r.lines << r.temp_lines[0]
+					}
+					r.temp_lines.delete(0)
+				}
+				if r.line.starts_with('import ') {
+					mod := r.line.fields()[1]
+					if mod !in r.modules {
+						r.modules << mod
+					}
+				} else if r.line.starts_with('#include ') {
+					r.includes << r.line
+				} else {
+					r.lines << r.line
+				}
+			} else {
+				for r.temp_lines.len > 0 {
+					r.temp_lines.delete(0)
+				}
+			}
+			print_output(s)
+		}
+	}
+}
+
+fn print_output(s os.Result) {
+	lines := s.output.trim_right('\n\r').split_into_lines()
+	for line in lines {
+		if line.contains('.vrepl_temp.v:') {
+			// Hide the temporary file name
+			sline := line.all_after('.vrepl_temp.v:')
+			idx := sline.index(' ') or {
+				println(sline)
+				return
+			}
+			println(sline[idx + 1..])
+		} else if line.contains('.vrepl.v:') {
+			// Ensure that .vrepl.v: is at the start, ignore the path
+			// This is needed to have stable .repl tests.
+			idx := line.index('.vrepl.v:') or { return }
+			println(line[idx..])
+		} else {
+			println(line)
+		}
+	}
+}
+
+fn main() {
+	// Support for the parameters replfolder and replprefix is needed
+	// so that the repl can be launched in parallel by several different
+	// threads by the REPL test runner.
+	args := cmdline.options_after(os.args, ['repl'])
+	replfolder := os.real_path(cmdline.option(args, '-replfolder', os.temp_dir()))
+	replprefix := cmdline.option(args, '-replprefix', 'noprefix.${rand.ulid()}.')
+	if !os.exists(os.getenv('VEXE')) {
+		println('Usage:')
+		println('  VEXE=vexepath vrepl\n')
+		println('  ... where vexepath is the full path to the v executable file')
+		return
+	}
+	run_repl(replfolder, replprefix)
+}
+
+fn rerror(s string) {
+	println('V repl error: $s')
+	os.flush()
+}
+
+fn (mut r Repl) get_one_line(prompt string) ?string {
+	if is_stdin_a_pipe {
+		iline := os.get_raw_line()
+		if iline.len == 0 {
+			return none
+		}
+		return iline
+	}
+	rline := r.readline.read_line(prompt) or { return none }
+	return rline
+}
+
+fn cleanup_files(files []string) {
+	for file in files {
+		os.rm(file) or {}
+		$if windows {
+			os.rm(file[..file.len - 2] + '.exe') or {}
+			$if msvc {
+				os.rm(file[..file.len - 2] + '.ilk') or {}
+				os.rm(file[..file.len - 2] + '.pdb') or {}
+			}
+		} $else {
+			os.rm(file[..file.len - 2]) or {}
+		}
+	}
+}
+
+fn repl_run_vfile(file string) ?os.Result {
+	$if trace_repl_temp_files ? {
+		eprintln('>> repl_run_vfile file: $file')
+	}
+	s := os.execute('"$vexe" -repl run "$file"')
+	if s.exit_code < 0 {
+		rerror(s.output)
+		return error(s.output)
+	}
+	return s
+}
-- 
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