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// file : bdep/project-email.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bdep/project-email.hxx>
#include <libbutl/filesystem.mxx>
#include <bdep/diagnostics.hxx>
using namespace butl;
namespace bdep
{
optional<string>
project_email (const dir_path& prj)
{
optional<string> r;
// The search order is as follows:
//
// BDEP_EMAIL
// <VCS>
// EMAIL
//
if ((r = getenv ("BDEP_EMAIL")))
return r;
// See if this is a VCS repository we recognize.
//
// .git can be either a directory or a file in case of a submodule.
//
if (entry_exists (prj / ".git",
true /* follow_symlinks */,
true /* ignore_errors */))
{
// In git the author email can be specified with the GIT_AUTHOR_EMAIL
// environment variable after which things fall back to the committer
// (GIT_COMMITTER_EMAIL and then the user.email git-config value). The
// resolved value can be queried with the GIT_AUTHOR_IDENT logical
// variable.
//
process pr;
bool io (false);
try
{
fdpipe pipe (fdopen_pipe ());
// If git cannot determine the author name/email, it fails verbosely
// so we suppress all diagnostics.
//
pr = start (0 /* stdin */,
pipe /* stdout */,
fdnull () /* stderr */,
"git",
"-C", prj,
"var",
"GIT_AUTHOR_IDENT");
pipe.out.close ();
ifdstream is (move (pipe.in), ifdstream::badbit);
// The output should be a single line in this form:
//
// NAME <EMAIL> TIME ZONE
//
// For example:
//
// John Doe <john@example.org> 1530517726 +0200
//
// The <> delimiters are there even if the email is empty so we use
// them as anchors.
//
string l;
if (!eof (getline (is, l)))
{
size_t p1, p2;
if ((p2 = l.rfind ('>' )) == string::npos ||
(p1 = l.rfind ('<', p2)) == string::npos)
fail << "no email in git-var output" << endf;
if (++p1 != p2)
r = string (l, p1, p2 - p1);
}
is.close (); // Detect errors.
}
catch (const io_error&)
{
io = true; // Presumably git failed so check that first.
}
if (!pr.wait ())
{
const process_exit& e (*pr.exit);
if (!e.normal ())
fail << "process git " << e;
r = nullopt;
}
else if (io)
fail << "unable to read git-var output";
if (r)
return r;
}
if ((r = getenv ("EMAIL")))
return r;
return r;
}
}
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