module vgit import os import flag import scripting pub fn check_v_commit_timestamp_before_self_rebuilding(v_timestamp int) { if v_timestamp >= 1561805697 { return } eprintln('##################################################################') eprintln('# WARNING: v self rebuilding, before 5b7a1e8 (2019-06-29 12:21) #') eprintln('# required the v executable to be built *inside* #') eprintln('# the toplevel compiler/ folder. #') eprintln('# #') eprintln('# That is not supported by this tool. #') eprintln('# You will have to build it manually there. #') eprintln('##################################################################') } pub fn validate_commit_exists(commit string) { if commit.len == 0 { return } cmd := "git cat-file -t '$commit' " if !scripting.exit_0_status(cmd) { eprintln('Commit: "$commit" does not exist in the current repository.') exit(3) } } pub fn line_to_timestamp_and_commit(line string) (int, string) { parts := line.split(' ') return parts[0].int(), parts[1] } pub fn normalized_workpath_for_commit(workdir string, commit string) string { nc := 'v_at_' + commit.replace('^', '_').replace('-', '_').replace('/', '_') return os.real_path(workdir + os.path_separator + nc) } fn get_current_folder_commit_hash() string { vline := scripting.run('git rev-list -n1 --timestamp HEAD') _, v_commithash := line_to_timestamp_and_commit(vline) return v_commithash } pub fn prepare_vc_source(vcdir string, cdir string, commit string) (string, string) { scripting.chdir(cdir) // Building a historic v with the latest vc is not always possible ... // It is more likely, that the vc *at the time of the v commit*, // or slightly before that time will be able to build the historic v: vline := scripting.run('git rev-list -n1 --timestamp "$commit" ') v_timestamp, v_commithash := line_to_timestamp_and_commit(vline) scripting.verbose_trace(@FN, 'v_timestamp: $v_timestamp | v_commithash: $v_commithash') check_v_commit_timestamp_before_self_rebuilding(v_timestamp) scripting.chdir(vcdir) scripting.run('git checkout --quiet master') // mut vccommit := '' vcbefore_subject_match := scripting.run('git rev-list HEAD -n1 --timestamp --grep=${v_commithash[0..7]} ') scripting.verbose_trace(@FN, 'vcbefore_subject_match: $vcbefore_subject_match') if vcbefore_subject_match.len > 3 { _, vccommit = line_to_timestamp_and_commit(vcbefore_subject_match) } else { scripting.verbose_trace(@FN, 'the v commit did not match anything in the vc log; try --timestamp instead.') vcbefore := scripting.run('git rev-list HEAD -n1 --timestamp --before=$v_timestamp ') _, vccommit = line_to_timestamp_and_commit(vcbefore) } scripting.verbose_trace(@FN, 'vccommit: $vccommit') scripting.run('git checkout --quiet "$vccommit" ') scripting.run('wc *.c') scripting.chdir(cdir) return v_commithash, vccommit } pub fn clone_or_pull(remote_git_url string, local_worktree_path string) { // NB: after clone_or_pull, the current repo branch is === HEAD === master if os.is_dir(local_worktree_path) && os.is_dir(os.join_path_single(local_worktree_path, '.git')) { // Already existing ... Just pulling in this case is faster usually. scripting.run('git -C "$local_worktree_path" checkout --quiet master') scripting.run('git -C "$local_worktree_path" pull --quiet ') } else { // Clone a fresh scripting.run('git clone --quiet "$remote_git_url" "$local_worktree_path" ') } } pub struct VGitContext { pub: cc string = 'cc' // what compiler to use workdir string = '/tmp' // the base working folder commit_v string = 'master' // the commit-ish that needs to be prepared path_v string // where is the local working copy v repo path_vc string // where is the local working copy vc repo v_repo_url string // the remote v repo URL vc_repo_url string // the remote vc repo URL pub mut: // these will be filled by vgitcontext.compile_oldv_if_needed() commit_v__hash string // the git commit of the v repo that should be prepared commit_vc_hash string // the git commit of the vc repo, corresponding to commit_v__hash vexename string // v or v.exe vexepath string // the full absolute path to the prepared v/v.exe vvlocation string // v.v or compiler/ or cmd/v, depending on v version make_fresh_tcc bool // whether to do 'make fresh_tcc' before compiling an old V. } pub fn (mut vgit_context VGitContext) compile_oldv_if_needed() { vgit_context.vexename = if os.user_os() == 'windows' { 'v.exe' } else { 'v' } vgit_context.vexepath = os.real_path(os.join_path_single(vgit_context.path_v, vgit_context.vexename)) mut command_for_building_v_from_c_source := '' mut command_for_selfbuilding := '' if 'windows' == os.user_os() { command_for_building_v_from_c_source = '$vgit_context.cc -std=c99 -I ./thirdparty/stdatomic/win -municode -w -o cv.exe "$vgit_context.path_vc/v_win.c" ' command_for_selfbuilding = './cv.exe -o $vgit_context.vexename {SOURCE}' } else { command_for_building_v_from_c_source = '$vgit_context.cc -std=gnu11 -I ./thirdparty/stdatomic/nix -w -o cv "$vgit_context.path_vc/v.c" -lm -lpthread' command_for_selfbuilding = './cv -o $vgit_context.vexename {SOURCE}' } scripting.chdir(vgit_context.workdir) clone_or_pull(vgit_context.v_repo_url, vgit_context.path_v) clone_or_pull(vgit_context.vc_repo_url, vgit_context.path_vc) scripting.chdir(vgit_context.path_v) scripting.run('git checkout --quiet $vgit_context.commit_v') if os.is_dir(vgit_context.path_v) && os.exists(vgit_context.vexepath) { // already compiled, so no need to compile v again vgit_context.commit_v__hash = get_current_folder_commit_hash() return } v_commithash, vccommit_before := prepare_vc_source(vgit_context.path_vc, vgit_context.path_v, 'HEAD') vgit_context.commit_v__hash = v_commithash vgit_context.commit_vc_hash = vccommit_before if os.exists('cmd/v') { vgit_context.vvlocation = 'cmd/v' } else { vgit_context.vvlocation = if os.exists('v.v') { 'v.v' } else { 'compiler' } } if os.is_dir(vgit_context.path_v) && os.exists(vgit_context.vexepath) { // already compiled, so no need to compile v again return } // Recompilation is needed. Just to be sure, clean up everything first. scripting.run('git clean -xf') if vgit_context.make_fresh_tcc { scripting.run('make fresh_tcc') } scripting.run(command_for_building_v_from_c_source) build_cmd := command_for_selfbuilding.replace('{SOURCE}', vgit_context.vvlocation) scripting.run(build_cmd) // At this point, there exists a file vgit_context.vexepath // which should be a valid working V executable. } pub struct VGitOptions { pub mut: workdir string // the working folder (typically /tmp), where the tool will write v_repo_url string // the url of the V repository. It can be a local folder path, if you want to eliminate network operations... vc_repo_url string // the url of the vc repository. It can be a local folder path, if you want to eliminate network operations... show_help bool // whether to show the usage screen verbose bool // should the tool be much more verbose } pub fn add_common_tool_options(mut context VGitOptions, mut fp flag.FlagParser) []string { tdir := os.temp_dir() context.workdir = os.real_path(fp.string('workdir', `w`, context.workdir, 'A writable base folder. Default: $tdir')) context.v_repo_url = fp.string('vrepo', 0, context.v_repo_url, 'The url of the V repository. You can clone it locally too. See also --vcrepo below.') context.vc_repo_url = fp.string('vcrepo', 0, context.vc_repo_url, 'The url of the vc repository. You can clone it ${flag.space}beforehand, and then just give the local folder ${flag.space}path here. That will eliminate the network ops ${flag.space}done by this tool, which is useful, if you want ${flag.space}to script it/run it in a restrictive vps/docker. ') context.show_help = fp.bool('help', `h`, false, 'Show this help screen.') context.verbose = fp.bool('verbose', `v`, false, 'Be more verbose.') if context.show_help { println(fp.usage()) exit(0) } if context.verbose { scripting.set_verbose(true) } if os.is_dir(context.v_repo_url) { context.v_repo_url = os.real_path(context.v_repo_url) } if os.is_dir(context.vc_repo_url) { context.vc_repo_url = os.real_path(context.vc_repo_url) } commits := fp.finalize() or { eprintln('Error: $err') exit(1) } for commit in commits { validate_commit_exists(commit) } return commits }