v/cmd/tools/modules/vgit/vgit.v

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module vgit
import os
import flag
import scripting
const (
remote_v_repo_url = 'https://github.com/vlang/v'
remote_vc_repo_url = 'https://github.com/vlang/vc'
)
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('/', '_')
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return os.realpath(workdir + os.path_separator + nc)
}
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 "$commit" ')
v_timestamp,v_commithash := vgit.line_to_timestamp_and_commit(vline)
vgit.check_v_commit_timestamp_before_self_rebuilding(v_timestamp)
scripting.chdir(vcdir)
scripting.run('git checkout master')
vcbefore := scripting.run('git rev-list HEAD -n1 --timestamp --before=$v_timestamp ')
_,vccommit_before := vgit.line_to_timestamp_and_commit(vcbefore)
scripting.run('git checkout "$vccommit_before" ')
scripting.run('wc *.c')
scripting.chdir(cdir)
return v_commithash,vccommit_before
}
pub fn clone_or_pull( remote_git_url string, local_worktree_path string ) {
// NB: after clone_or_pull, the current repo branch is === HEAD === master
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if os.is_dir( local_worktree_path ) && os.is_dir(os.join(local_worktree_path,'.git')) {
// Already existing ... Just pulling in this case is faster usually.
scripting.run('git -C "$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" "$local_worktree_path" ')
}
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}
//
pub struct VGitContext {
pub:
cc string = 'cc' // what compiler to use
workdir string = '/tmp' // the base working folder
commit_v string = 'master' // the commit-ish that needs to be prepared
path_v string // where is the local working copy v repo
path_vc string // where is the local working copy vc repo
v_repo_url string // the remote v repo URL
vc_repo_url string // the remote vc repo URL
pub mut:
// these will be filled by vgitcontext.compile_oldv_if_needed()
commit_v__hash string // the git commit of the v repo that should be prepared
commit_vc_hash string // the git commit of the vc repo, corresponding to commit_v__hash
vexename string // v or v.exe
vexepath string // the full absolute path to the prepared v/v.exe
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vvlocation string // v.v or compiler/ or cmd/v, depending on v version
}
pub fn (vgit_context mut VGitContext) compile_oldv_if_needed() {
vgit_context.vexename = if os.user_os() == 'windows' { 'v.exe' } else { 'v' }
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vgit_context.vexepath = os.realpath( os.join(vgit_context.path_v, vgit_context.vexename) )
mut command_for_building_v_from_c_source := ''
mut command_for_selfbuilding := ''
if 'windows' == os.user_os() {
command_for_building_v_from_c_source = '$vgit_context.cc -std=c99 -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 -w -o cv "$vgit_context.path_vc/v.c" -lm'
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 )
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scripting.chdir(vgit_context.path_v)
scripting.run('git checkout $vgit_context.commit_v')
v_commithash,vccommit_before := vgit.prepare_vc_source(vgit_context.path_vc, vgit_context.path_v, vgit_context.commit_v)
vgit_context.commit_v__hash = v_commithash
vgit_context.commit_vc_hash = vccommit_before
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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')
scripting.run(command_for_building_v_from_c_source)
build_cmd := command_for_selfbuilding.replace('{SOURCE}', vgit_context.vvlocation)
scripting.run(build_cmd)
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// At this point, there exists a file vgit_context.vexepath
// which should be a valid working V executable.
}
pub fn add_common_tool_options<T>(context mut T, fp mut flag.FlagParser) []string {
tdir := os.tmpdir()
context.workdir = os.realpath(fp.string_('workdir', `w`, tdir, 'A writable base folder. Default: $tdir'))
context.v_repo_url = fp.string('vrepo', vgit.remote_v_repo_url, 'The url of the V repository. You can clone it locally too. See also --vcrepo below.')
context.vc_repo_url = fp.string('vcrepo', vgit.remote_vc_repo_url, 'The url of the vc repository. You can clone it
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${flag.SPACE}beforehand, and then just give the local folder
${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)
}
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if os.is_dir(context.v_repo_url) {
context.v_repo_url = os.realpath( context.v_repo_url )
}
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if os.is_dir(context.vc_repo_url) {
context.vc_repo_url = os.realpath( context.vc_repo_url )
}
commits := fp.finalize() or {
eprintln('Error: ' + err)
exit(1)
}
for commit in commits {
vgit.validate_commit_exists(commit)
}
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return commits
}