427 lines
13 KiB
V
427 lines
13 KiB
V
// Copyright (c) 2021 Lars Pontoppidan. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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//
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// vgret (V Graphics REgression Tool) aids in generating screenshots of various graphical `gg`
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// based V applications, in a structured directory hierarchy, with the intent of either:
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// * Generate a directory structure of screenshots/images to test against
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// (which, as an example, could later be pushed to a remote git repository)
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// * Test for *visual* differences between two, structurally equal, directories
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//
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// vgret uses features and applications that is currently only available on Linux based distros:
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// idiff : `sudo apt install openimageio-tools` to programmatically find *visual* differences between two images.
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//
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// For developers:
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// For a quick overview of the generated images you can use `montage` from imagemagick to generate a "Contact Sheet":
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// montage -verbose -label '%f' -font Helvetica -pointsize 10 -background '#000000' -fill 'gray' -define jpeg:size=200x200 -geometry 200x200+2+2 -auto-orient $(fd -t f . /path/to/vgret/out/dir) /tmp/montage.jpg
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//
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// To generate the reference images locally - or for uploading to a remote repo like `gg-regression-images`
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// You can do the following:
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// 1. `export DISPLAY=:99` # Start all graphical apps on DISPLAY 99
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// 2. `Xvfb $DISPLAY -screen 0 1280x1024x24 &` # Starts a virtual X11 screen buffer
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// 3. `v gret -v /tmp/gg-regression-images` # Generate reference images to /tmp/gg-regression-images
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// 4. `v gret -v /tmp/test /tmp/gg-regression-images` # Test if the tests can pass locally by comparing to a fresh imageset
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// 5. Visually check the images (you can get an overview by running the `montage` command above)
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// 6. Upload to GitHub or keep locally for more testing/tweaking
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//
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// It's a known factor that the images generated on a local machine won't match the images generated on a remote machine by 100%.
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// They will most likely differ by a small percentage - the comparison tool can be tweaked to accept these subtle changes,
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// at the expense of slightly more inaccurate test results. For non-animated apps the percentage should be > 0.01.
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// You can emulate or test these inaccuracies to some extend locally by simply running the test from a terminal using
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// your physical X11 session display (Usually DISPLAY=:0).
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//
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// Read more about the options of `idiff` here: https://openimageio.readthedocs.io/en/latest/idiff.html
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//
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import os
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import flag
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import toml
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const (
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tool_name = os.file_name(os.executable())
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tool_version = '0.0.1'
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tool_description = '\n Dump and/or compare rendered frames of `gg` based apps
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Examples:
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Generate screenshots to `/tmp/test`
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v gret /tmp/test
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Generate and compare screenshots in `/tmp/src` to existing screenshots in `/tmp/dst`
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v gret /tmp/src /tmp/dst
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Compare screenshots in `/tmp/src` to existing screenshots in `/tmp/dst`
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v gret --compare-only /tmp/src /tmp/dst
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'
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tmp_dir = os.join_path(os.temp_dir(), 'v', tool_name)
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runtime_os = os.user_os()
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v_root = os.real_path(@VMODROOT)
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)
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const (
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supported_hosts = ['linux']
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// External tool executables
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v_exe = vexe()
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idiff_exe = os.find_abs_path_of_executable('idiff') or { '' }
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)
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const (
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embedded_toml = $embed_file('vgret.defaults.toml', .zlib)
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default_toml = embedded_toml.to_string()
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empty_toml_array = []toml.Any{}
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empty_toml_map = map[string]toml.Any{}
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)
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struct Config {
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path string
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mut:
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apps []AppConfig
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}
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struct CompareOptions {
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mut:
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method string = 'idiff'
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flags []string
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}
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struct CaptureOptions {
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mut:
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method string = 'gg_record'
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flags []string
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env map[string]string
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}
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struct AppConfig {
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compare CompareOptions
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capture CaptureOptions
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path string
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abs_path string
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mut:
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screenshots_path string
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screenshots []string
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}
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struct Options {
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verbose bool
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compare_only bool
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root_path string
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mut:
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config Config
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}
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fn main() {
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if os.args.len == 1 {
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println('Usage: $tool_name PATH \n$tool_description\n$tool_name -h for more help...')
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exit(1)
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}
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mut fp := flag.new_flag_parser(os.args[1..])
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fp.application(tool_name)
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fp.version(tool_version)
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fp.description(tool_description)
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fp.arguments_description('PATH [PATH]')
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fp.skip_executable()
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show_help := fp.bool('help', `h`, false, 'Show this help text.')
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if show_help {
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println(fp.usage())
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exit(0)
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}
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// Collect tool options
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mut opt := Options{
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verbose: fp.bool('verbose', `v`, false, "Be verbose about the tool's progress.")
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compare_only: fp.bool('compare-only', `c`, false, "Don't generate screenshots - only compare input directories")
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root_path: fp.string('root-path', `r`, v_root, 'Root path of the comparison')
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}
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toml_conf := fp.string('toml-config', `t`, default_toml, 'Path or string with TOML configuration')
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ensure_env(opt) or { panic(err) }
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arg_paths := fp.finalize() or { panic(err) }
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if arg_paths.len == 0 {
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println(fp.usage())
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println('\nError missing arguments')
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exit(1)
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}
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opt.config = new_config(opt.root_path, toml_conf) ?
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gen_in_path := arg_paths[0]
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if arg_paths.len >= 1 {
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generate_screenshots(mut opt, gen_in_path) ?
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}
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if arg_paths.len > 1 {
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target_path := arg_paths[1]
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path := opt.config.path
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all_paths_in_use := [path, gen_in_path, target_path]
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for path_in_use in all_paths_in_use {
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if !os.is_dir(path_in_use) {
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panic('`$path_in_use` is not a directory')
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}
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}
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if path == target_path || gen_in_path == target_path || gen_in_path == path {
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panic('Compare paths can not be the same directory `$path`/`$target_path`/`$gen_in_path`')
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}
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compare_screenshots(opt, gen_in_path, target_path) or { panic(err) }
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}
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}
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fn generate_screenshots(mut opt Options, output_path string) ? {
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path := opt.config.path
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dst_path := output_path.trim_right('/')
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if !os.is_dir(path) {
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return error('`$path` is not a directory')
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}
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for mut app_config in opt.config.apps {
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file := app_config.path
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app_path := app_config.abs_path
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mut rel_out_path := ''
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if os.is_file(app_path) {
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rel_out_path = os.dir(file)
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} else {
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rel_out_path = file
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}
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if opt.verbose {
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eprintln('Compiling shaders (if needed) for `$file`')
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}
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sh_result := os.execute('${os.quoted_path(v_exe)} shader ${os.quoted_path(app_path)}')
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if sh_result.exit_code != 0 {
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if opt.verbose {
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eprintln('Skipping shader compile for `$file` v shader failed with:\n$sh_result.output')
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}
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continue
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}
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if !os.exists(dst_path) {
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if opt.verbose {
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eprintln('Creating output path `$dst_path`')
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}
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os.mkdir_all(dst_path) ?
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}
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screenshot_path := os.join_path(dst_path, rel_out_path)
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if !os.exists(screenshot_path) {
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os.mkdir_all(screenshot_path) or {
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return error('Failed making screenshot path `$screenshot_path`')
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}
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}
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app_config.screenshots_path = screenshot_path
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app_config.screenshots = take_screenshots(opt, app_config) or {
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return error('Failed taking screenshots of `$app_path`:\n$err.msg')
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}
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}
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}
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fn compare_screenshots(opt Options, output_path string, target_path string) ? {
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mut fails := map[string]string{}
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mut warns := map[string]string{}
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for app_config in opt.config.apps {
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screenshots := app_config.screenshots
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if opt.verbose {
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eprintln('Comparing $screenshots.len screenshots in `$output_path` with `$target_path`')
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}
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for screenshot in screenshots {
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relative_screenshot := screenshot.all_after(output_path + os.path_separator)
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src := screenshot
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target := os.join_path(target_path, relative_screenshot)
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if opt.verbose {
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eprintln('Comparing `$src` with `$target` with $app_config.compare.method')
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}
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if app_config.compare.method == 'idiff' {
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if idiff_exe == '' {
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return error('$tool_name need the `idiff` tool installed. It can be installed on Ubuntu with `sudo apt install openimageio-tools`')
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}
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diff_file := os.join_path(os.temp_dir(), os.file_name(src).all_before_last('.') +
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'.diff.tif')
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flags := app_config.compare.flags.join(' ')
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diff_cmd := '${os.quoted_path(idiff_exe)} $flags -abs -od -o ${os.quoted_path(diff_file)} -abs ${os.quoted_path(src)} ${os.quoted_path(target)}'
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if opt.verbose {
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eprintln('Running: $diff_cmd')
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}
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result := os.execute(diff_cmd)
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if opt.verbose && result.exit_code == 0 {
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eprintln('OUTPUT: \n$result.output')
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}
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if result.exit_code != 0 {
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eprintln('OUTPUT: \n$result.output')
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if result.exit_code == 1 {
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warns[src] = target
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} else {
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fails[src] = target
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}
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}
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}
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}
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}
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if warns.len > 0 {
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eprintln('--- WARNINGS ---')
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eprintln('The following files had warnings when compared to their targets')
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for warn_src, warn_target in warns {
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eprintln('$warn_src ~= $warn_target')
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}
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}
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if fails.len > 0 {
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eprintln('--- ERRORS ---')
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eprintln('The following files did not match their targets')
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for fail_src, fail_target in fails {
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eprintln('$fail_src != $fail_target')
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}
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first := fails.keys()[0]
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fail_copy := os.join_path(os.temp_dir(), 'fail.' + first.all_after_last('.'))
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os.cp(first, fail_copy) or { panic(err) }
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eprintln('First failed file `$first` is copied to `$fail_copy`')
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diff_file := os.join_path(os.temp_dir(), os.file_name(first).all_before_last('.') +
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'.diff.tif')
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diff_copy := os.join_path(os.temp_dir(), 'diff.tif')
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if os.is_file(diff_file) {
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os.cp(diff_file, diff_copy) or { panic(err) }
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eprintln('First failed diff file `$diff_file` is copied to `$diff_copy`')
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}
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exit(1)
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}
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}
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fn take_screenshots(opt Options, app AppConfig) ?[]string {
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out_path := app.screenshots_path
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if !opt.compare_only {
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if opt.verbose {
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eprintln('Taking screenshot(s) of `$app.path` to `$out_path`')
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}
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if app.capture.method == 'gg_record' {
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for k, v in app.capture.env {
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rv := v.replace('\$OUT_PATH', out_path)
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if opt.verbose {
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eprintln('Setting ENV `$k` = $rv ...')
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}
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os.setenv('$k', rv, true)
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}
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mut flags := app.capture.flags.join(' ')
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v_cmd := '${os.quoted_path(v_exe)} $flags -d gg_record run ${os.quoted_path(app.abs_path)}'
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if opt.verbose {
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eprintln('Running `$v_cmd`')
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}
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result := os.execute('$v_cmd')
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if result.exit_code != 0 {
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return error('Failed taking screenshot of `$app.abs_path`:\n$result.output')
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}
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}
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}
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mut screenshots := []string{}
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shots := os.ls(out_path) or { return error('Failed listing dir `$out_path`') }
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for shot in shots {
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if shot.starts_with(os.file_name(app.path).all_before_last('.')) {
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screenshots << os.join_path(out_path, shot)
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}
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}
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return screenshots
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}
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// ensure_env returns nothing if everything is okay.
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fn ensure_env(opt Options) ? {
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if !os.exists(tmp_dir) {
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os.mkdir_all(tmp_dir) ?
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}
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if runtime_os !in supported_hosts {
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return error('$tool_name is currently only supported on $supported_hosts hosts')
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}
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}
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// vexe returns the absolute path to the V compiler.
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fn vexe() string {
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mut exe := os.getenv('VEXE')
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if os.is_executable(exe) {
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return os.real_path(exe)
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}
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possible_symlink := os.find_abs_path_of_executable('v') or { '' }
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if os.is_executable(possible_symlink) {
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exe = os.real_path(possible_symlink)
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}
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return exe
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}
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fn new_config(root_path string, toml_config string) ?Config {
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doc := toml.parse(toml_config) ?
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path := os.real_path(root_path).trim_right('/')
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compare_method := doc.value('compare.method').default_to('idiff').string()
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compare_flags := doc.value('compare.flags').default_to(empty_toml_array).array().as_strings()
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default_compare := CompareOptions{
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method: compare_method
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flags: compare_flags
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}
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capture_method := doc.value('capture.method').default_to('gg_record').string()
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capture_flags := doc.value('capture.flags').default_to(empty_toml_array).array().as_strings()
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capture_env := doc.value('capture.env').default_to(empty_toml_map).as_map()
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mut env_map := map[string]string{}
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for k, v in capture_env {
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env_map[k] = v.string()
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}
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default_capture := CaptureOptions{
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method: capture_method
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flags: capture_flags
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env: env_map
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}
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apps_any := doc.value('apps').default_to(empty_toml_array).array()
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mut apps := []AppConfig{cap: apps_any.len}
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for app_any in apps_any {
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rel_path := app_any.value('path').string().trim_right('/')
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// Merge, per app, overwrites
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mut merged_compare := CompareOptions{}
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merged_compare.method = app_any.value('compare.method').default_to(default_compare.method).string()
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merged_compare_flags := app_any.value('compare.flags').default_to(empty_toml_array).array().as_strings()
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if merged_compare_flags.len > 0 {
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merged_compare.flags = merged_compare_flags
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} else {
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merged_compare.flags = default_compare.flags
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}
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mut merged_capture := CaptureOptions{}
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merged_capture.method = app_any.value('capture.method').default_to(default_capture.method).string()
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merged_capture_flags := app_any.value('capture.flags').default_to(empty_toml_array).array().as_strings()
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if merged_capture_flags.len > 0 {
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merged_capture.flags = merged_capture_flags
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} else {
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merged_capture.flags = default_capture.flags
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}
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merge_capture_env := app_any.value('capture.env').default_to(empty_toml_map).as_map()
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mut merge_env_map := default_capture.env.clone()
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for k, v in merge_capture_env {
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merge_env_map[k] = v.string()
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}
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for k, v in merge_env_map {
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merged_capture.env[k] = v
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}
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app_config := AppConfig{
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compare: merged_compare
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capture: merged_capture
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path: rel_path
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abs_path: os.join_path(path, rel_path).trim_right('/')
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}
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apps << app_config
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}
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return Config{
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apps: apps
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path: path
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}
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}
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