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