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cmd/dist: convert dist from Hg to Git.

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This commit is contained in:
David Symonds 2014-12-08 13:53:11 +11:00
parent 369873c6e5
commit f33fc0eb95
1 changed files with 59 additions and 41 deletions
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100
src/cmd/dist/build.c vendored
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@ -237,24 +237,65 @@ chomp(Buf *b)
b->len--;
}
static char*
branchtag(char *branch, bool *precise)
{
char *tag, *p, *q;
int i;
Buf b, arg;
Vec tags;
binit(&b);
binit(&arg);
vinit(&tags);
bprintf(&arg, "master..%s", branch);
run(&b, goroot, CheckExit, "git", "log", "--decorate=full", "--format=format:%d", bstr(&arg), nil);
splitlines(&tags, bstr(&b));
tag = branch;
for(i=0; i < tags.len; i++) {
// Each line is either blank, or looks like
// (tag: refs/tags/go1.4rc2, refs/remotes/origin/release-branch.go1.4, refs/heads/release-branch.go1.4)
// We need to find an element starting with refs/tags/.
p = xstrstr(tags.p[i], " refs/tags/");
if(p == nil)
continue;
p += xstrlen(" refs/tags/");
// The tag name ends at a comma or paren (prefer the first).
q = xstrstr(p, ",");
if(q == nil)
q = xstrstr(p, ")");
if(q == nil)
continue; // malformed line; ignore it
*q = '\0';
tag = xstrdup(p);
if(i == 0)
*precise = 1; // tag denotes HEAD
break;
}
bfree(&b);
bfree(&arg);
vfree(&tags);
return tag;
}
// findgoversion determines the Go version to use in the version string.
static char*
findgoversion(void)
{
char *tag, *rev, *p;
int i, nrev;
char *tag, *p;
bool precise;
Buf b, path, bmore, branch;
Vec tags;
binit(&b);
binit(&path);
binit(&bmore);
binit(&branch);
vinit(&tags);
// The $GOROOT/VERSION file takes priority, for distributions
// without the Mercurial repo.
// without the source repo.
bpathf(&path, "%s/VERSION", goroot);
if(isfile(bstr(&path))) {
readfile(&b, bstr(&path));
@ -268,7 +309,7 @@ findgoversion(void)
}
// The $GOROOT/VERSION.cache file is a cache to avoid invoking
// hg every time we run this command. Unlike VERSION, it gets
// git every time we run this command. Unlike VERSION, it gets
// deleted by the clean command.
bpathf(&path, "%s/VERSION.cache", goroot);
if(isfile(bstr(&path))) {
@ -277,49 +318,27 @@ findgoversion(void)
goto done;
}
// Otherwise, use Mercurial.
// Otherwise, use Git.
// What is the current branch?
run(&branch, goroot, CheckExit, "hg", "identify", "-b", nil);
run(&branch, goroot, CheckExit, "git", "rev-parse", "--abbrev-ref", "HEAD", nil);
chomp(&branch);
// What are the tags along the current branch?
tag = "devel";
rev = ".";
run(&b, goroot, CheckExit, "hg", "log", "-b", bstr(&branch), "-r", ".:0", "--template", "{tags} + ", nil);
splitfields(&tags, bstr(&b));
nrev = 0;
for(i=0; i<tags.len; i++) {
p = tags.p[i];
if(streq(p, "+"))
nrev++;
// Only show the beta tag for the exact revision.
if(hasprefix(p, "go") && (!contains(p, "beta") || nrev == 0)) {
tag = xstrdup(p);
// If this tag matches the current checkout
// exactly (no "+" yet), don't show extra
// revision information.
if(nrev == 0)
rev = "";
break;
}
}
precise = 0;
if(tag[0] == '\0') {
// Did not find a tag; use branch name.
bprintf(&b, "branch.%s", bstr(&branch));
tag = btake(&b);
}
if(rev[0]) {
// Tag is before the revision we're building.
// Add extra information.
run(&bmore, goroot, CheckExit, "hg", "log", "--template", " +{node|short} {date|date}", "-r", rev, nil);
chomp(&bmore);
}
// If we're on a release branch, use the closest matching tag
// that is on the release branch (and not on the master branch).
if(hasprefix(bstr(&branch), "release-branch."))
tag = branchtag(bstr(&branch), &precise);
bprintf(&b, "%s", tag);
if(bmore.len > 0)
if(!precise) {
// Tag does not point at HEAD; add hash and date to version.
run(&bmore, goroot, CheckExit, "git", "log", "-n", "1", "--format=format: +%h %cd", "HEAD", nil);
chomp(&bmore);
bwriteb(&b, &bmore);
}
// Cache version.
writefile(&b, bstr(&path), 0);
@ -332,7 +351,6 @@ done:
bfree(&path);
bfree(&bmore);
bfree(&branch);
vfree(&tags);
return p;
}