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-rw-r--r--libbuild2/script/builtin-options.cxx291
-rw-r--r--libbuild2/script/builtin-options.hxx84
-rw-r--r--libbuild2/script/builtin-options.ixx57
-rw-r--r--libbuild2/script/builtin.cli7
-rw-r--r--libbuild2/script/parser.cxx373
-rw-r--r--libbuild2/script/parser.hxx31
-rw-r--r--libbuild2/script/run.cxx391
-rw-r--r--libbuild2/script/run.hxx66
-rw-r--r--libbuild2/script/script.cxx24
-rw-r--r--libbuild2/script/script.hxx18
10 files changed, 1107 insertions, 235 deletions
diff --git a/libbuild2/script/builtin-options.cxx b/libbuild2/script/builtin-options.cxx
index 8e15ddd..9b4067b 100644
--- a/libbuild2/script/builtin-options.cxx
+++ b/libbuild2/script/builtin-options.cxx
@@ -1076,6 +1076,297 @@ namespace build2
return r;
}
+
+ // for_options
+ //
+
+ for_options::
+ for_options ()
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ }
+
+ for_options::
+ for_options (int& argc,
+ char** argv,
+ bool erase,
+ ::build2::build::cli::unknown_mode opt,
+ ::build2::build::cli::unknown_mode arg)
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ ::build2::build::cli::argv_scanner s (argc, argv, erase);
+ _parse (s, opt, arg);
+ }
+
+ for_options::
+ for_options (int start,
+ int& argc,
+ char** argv,
+ bool erase,
+ ::build2::build::cli::unknown_mode opt,
+ ::build2::build::cli::unknown_mode arg)
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ ::build2::build::cli::argv_scanner s (start, argc, argv, erase);
+ _parse (s, opt, arg);
+ }
+
+ for_options::
+ for_options (int& argc,
+ char** argv,
+ int& end,
+ bool erase,
+ ::build2::build::cli::unknown_mode opt,
+ ::build2::build::cli::unknown_mode arg)
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ ::build2::build::cli::argv_scanner s (argc, argv, erase);
+ _parse (s, opt, arg);
+ end = s.end ();
+ }
+
+ for_options::
+ for_options (int start,
+ int& argc,
+ char** argv,
+ int& end,
+ bool erase,
+ ::build2::build::cli::unknown_mode opt,
+ ::build2::build::cli::unknown_mode arg)
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ ::build2::build::cli::argv_scanner s (start, argc, argv, erase);
+ _parse (s, opt, arg);
+ end = s.end ();
+ }
+
+ for_options::
+ for_options (::build2::build::cli::scanner& s,
+ ::build2::build::cli::unknown_mode opt,
+ ::build2::build::cli::unknown_mode arg)
+ : exact_ (),
+ newline_ (),
+ whitespace_ ()
+ {
+ _parse (s, opt, arg);
+ }
+
+ typedef
+ std::map<std::string, void (*) (for_options&, ::build2::build::cli::scanner&)>
+ _cli_for_options_map;
+
+ static _cli_for_options_map _cli_for_options_map_;
+
+ struct _cli_for_options_map_init
+ {
+ _cli_for_options_map_init ()
+ {
+ _cli_for_options_map_["--exact"] =
+ &::build2::build::cli::thunk< for_options, &for_options::exact_ >;
+ _cli_for_options_map_["-e"] =
+ &::build2::build::cli::thunk< for_options, &for_options::exact_ >;
+ _cli_for_options_map_["--newline"] =
+ &::build2::build::cli::thunk< for_options, &for_options::newline_ >;
+ _cli_for_options_map_["-n"] =
+ &::build2::build::cli::thunk< for_options, &for_options::newline_ >;
+ _cli_for_options_map_["--whitespace"] =
+ &::build2::build::cli::thunk< for_options, &for_options::whitespace_ >;
+ _cli_for_options_map_["-w"] =
+ &::build2::build::cli::thunk< for_options, &for_options::whitespace_ >;
+ }
+ };
+
+ static _cli_for_options_map_init _cli_for_options_map_init_;
+
+ bool for_options::
+ _parse (const char* o, ::build2::build::cli::scanner& s)
+ {
+ _cli_for_options_map::const_iterator i (_cli_for_options_map_.find (o));
+
+ if (i != _cli_for_options_map_.end ())
+ {
+ (*(i->second)) (*this, s);
+ return true;
+ }
+
+ return false;
+ }
+
+ bool for_options::
+ _parse (::build2::build::cli::scanner& s,
+ ::build2::build::cli::unknown_mode opt_mode,
+ ::build2::build::cli::unknown_mode arg_mode)
+ {
+ // Can't skip combined flags (--no-combined-flags).
+ //
+ assert (opt_mode != ::build2::build::cli::unknown_mode::skip);
+
+ bool r = false;
+ bool opt = true;
+
+ while (s.more ())
+ {
+ const char* o = s.peek ();
+
+ if (std::strcmp (o, "--") == 0)
+ {
+ opt = false;
+ s.skip ();
+ r = true;
+ continue;
+ }
+
+ if (opt)
+ {
+ if (_parse (o, s))
+ {
+ r = true;
+ continue;
+ }
+
+ if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+ {
+ // Handle combined option values.
+ //
+ std::string co;
+ if (const char* v = std::strchr (o, '='))
+ {
+ co.assign (o, 0, v - o);
+ ++v;
+
+ int ac (2);
+ char* av[] =
+ {
+ const_cast<char*> (co.c_str ()),
+ const_cast<char*> (v)
+ };
+
+ ::build2::build::cli::argv_scanner ns (0, ac, av);
+
+ if (_parse (co.c_str (), ns))
+ {
+ // Parsed the option but not its value?
+ //
+ if (ns.end () != 2)
+ throw ::build2::build::cli::invalid_value (co, v);
+
+ s.next ();
+ r = true;
+ continue;
+ }
+ else
+ {
+ // Set the unknown option and fall through.
+ //
+ o = co.c_str ();
+ }
+ }
+
+ // Handle combined flags.
+ //
+ char cf[3];
+ {
+ const char* p = o + 1;
+ for (; *p != '\0'; ++p)
+ {
+ if (!((*p >= 'a' && *p <= 'z') ||
+ (*p >= 'A' && *p <= 'Z') ||
+ (*p >= '0' && *p <= '9')))
+ break;
+ }
+
+ if (*p == '\0')
+ {
+ for (p = o + 1; *p != '\0'; ++p)
+ {
+ std::strcpy (cf, "-");
+ cf[1] = *p;
+ cf[2] = '\0';
+
+ int ac (1);
+ char* av[] =
+ {
+ cf
+ };
+
+ ::build2::build::cli::argv_scanner ns (0, ac, av);
+
+ if (!_parse (cf, ns))
+ break;
+ }
+
+ if (*p == '\0')
+ {
+ // All handled.
+ //
+ s.next ();
+ r = true;
+ continue;
+ }
+ else
+ {
+ // Set the unknown option and fall through.
+ //
+ o = cf;
+ }
+ }
+ }
+
+ switch (opt_mode)
+ {
+ case ::build2::build::cli::unknown_mode::skip:
+ {
+ s.skip ();
+ r = true;
+ continue;
+ }
+ case ::build2::build::cli::unknown_mode::stop:
+ {
+ break;
+ }
+ case ::build2::build::cli::unknown_mode::fail:
+ {
+ throw ::build2::build::cli::unknown_option (o);
+ }
+ }
+
+ break;
+ }
+ }
+
+ switch (arg_mode)
+ {
+ case ::build2::build::cli::unknown_mode::skip:
+ {
+ s.skip ();
+ r = true;
+ continue;
+ }
+ case ::build2::build::cli::unknown_mode::stop:
+ {
+ break;
+ }
+ case ::build2::build::cli::unknown_mode::fail:
+ {
+ throw ::build2::build::cli::unknown_argument (o);
+ }
+ }
+
+ break;
+ }
+
+ return r;
+ }
}
}
diff --git a/libbuild2/script/builtin-options.hxx b/libbuild2/script/builtin-options.hxx
index c7cebbc..9361d18 100644
--- a/libbuild2/script/builtin-options.hxx
+++ b/libbuild2/script/builtin-options.hxx
@@ -253,6 +253,90 @@ namespace build2
vector<string> clear_;
bool clear_specified_;
};
+
+ class for_options
+ {
+ public:
+ for_options ();
+
+ for_options (int& argc,
+ char** argv,
+ bool erase = false,
+ ::build2::build::cli::unknown_mode option = ::build2::build::cli::unknown_mode::fail,
+ ::build2::build::cli::unknown_mode argument = ::build2::build::cli::unknown_mode::stop);
+
+ for_options (int start,
+ int& argc,
+ char** argv,
+ bool erase = false,
+ ::build2::build::cli::unknown_mode option = ::build2::build::cli::unknown_mode::fail,
+ ::build2::build::cli::unknown_mode argument = ::build2::build::cli::unknown_mode::stop);
+
+ for_options (int& argc,
+ char** argv,
+ int& end,
+ bool erase = false,
+ ::build2::build::cli::unknown_mode option = ::build2::build::cli::unknown_mode::fail,
+ ::build2::build::cli::unknown_mode argument = ::build2::build::cli::unknown_mode::stop);
+
+ for_options (int start,
+ int& argc,
+ char** argv,
+ int& end,
+ bool erase = false,
+ ::build2::build::cli::unknown_mode option = ::build2::build::cli::unknown_mode::fail,
+ ::build2::build::cli::unknown_mode argument = ::build2::build::cli::unknown_mode::stop);
+
+ for_options (::build2::build::cli::scanner&,
+ ::build2::build::cli::unknown_mode option = ::build2::build::cli::unknown_mode::fail,
+ ::build2::build::cli::unknown_mode argument = ::build2::build::cli::unknown_mode::stop);
+
+ // Option accessors and modifiers.
+ //
+ const bool&
+ exact () const;
+
+ bool&
+ exact ();
+
+ void
+ exact (const bool&);
+
+ const bool&
+ newline () const;
+
+ bool&
+ newline ();
+
+ void
+ newline (const bool&);
+
+ const bool&
+ whitespace () const;
+
+ bool&
+ whitespace ();
+
+ void
+ whitespace (const bool&);
+
+ // Implementation details.
+ //
+ protected:
+ bool
+ _parse (const char*, ::build2::build::cli::scanner&);
+
+ private:
+ bool
+ _parse (::build2::build::cli::scanner&,
+ ::build2::build::cli::unknown_mode option,
+ ::build2::build::cli::unknown_mode argument);
+
+ public:
+ bool exact_;
+ bool newline_;
+ bool whitespace_;
+ };
}
}
diff --git a/libbuild2/script/builtin-options.ixx b/libbuild2/script/builtin-options.ixx
index 8f84177..575eb95 100644
--- a/libbuild2/script/builtin-options.ixx
+++ b/libbuild2/script/builtin-options.ixx
@@ -153,6 +153,63 @@ namespace build2
{
this->clear_specified_ = x;
}
+
+ // for_options
+ //
+
+ inline const bool& for_options::
+ exact () const
+ {
+ return this->exact_;
+ }
+
+ inline bool& for_options::
+ exact ()
+ {
+ return this->exact_;
+ }
+
+ inline void for_options::
+ exact (const bool& x)
+ {
+ this->exact_ = x;
+ }
+
+ inline const bool& for_options::
+ newline () const
+ {
+ return this->newline_;
+ }
+
+ inline bool& for_options::
+ newline ()
+ {
+ return this->newline_;
+ }
+
+ inline void for_options::
+ newline (const bool& x)
+ {
+ this->newline_ = x;
+ }
+
+ inline const bool& for_options::
+ whitespace () const
+ {
+ return this->whitespace_;
+ }
+
+ inline bool& for_options::
+ whitespace ()
+ {
+ return this->whitespace_;
+ }
+
+ inline void for_options::
+ whitespace (const bool& x)
+ {
+ this->whitespace_ = x;
+ }
}
}
diff --git a/libbuild2/script/builtin.cli b/libbuild2/script/builtin.cli
index 50dd3a0..c993983 100644
--- a/libbuild2/script/builtin.cli
+++ b/libbuild2/script/builtin.cli
@@ -30,5 +30,12 @@ namespace build2
vector<string> --unset|-u;
vector<string> --clear|-c;
};
+
+ class for_options
+ {
+ bool --exact|-e;
+ bool --newline|-n;
+ bool --whitespace|-w;
+ };
}
}
diff --git a/libbuild2/script/parser.cxx b/libbuild2/script/parser.cxx
index 536821b..7989c20 100644
--- a/libbuild2/script/parser.cxx
+++ b/libbuild2/script/parser.cxx
@@ -4,10 +4,13 @@
#include <libbuild2/script/parser.hxx>
#include <cstring> // strchr()
+#include <sstream>
#include <libbuild2/variable.hxx>
-#include <libbuild2/script/run.hxx> // exit
+
+#include <libbuild2/script/run.hxx> // exit, stream_reader
#include <libbuild2/script/lexer.hxx>
+#include <libbuild2/script/builtin-options.hxx>
using namespace std;
@@ -140,18 +143,20 @@ namespace build2
return nullopt;
}
- pair<command_expr, parser::here_docs> parser::
+ parser::parse_command_expr_result parser::
parse_command_expr (token& t, type& tt,
- const redirect_aliases& ra)
+ const redirect_aliases& ra,
+ optional<token>&& program)
{
- // enter: first token of the command line
+ // enter: first (or second, if program) token of the command line
// leave: <newline> or unknown token
command_expr expr;
// OR-ed to an implied false for the first term.
//
- expr.push_back ({expr_operator::log_or, command_pipe ()});
+ if (!pre_parse_)
+ expr.push_back ({expr_operator::log_or, command_pipe ()});
command c; // Command being assembled.
@@ -218,8 +223,8 @@ namespace build2
// Add the next word to either one of the pending positions or to
// program arguments by default.
//
- auto add_word = [&c, &p, &mod, &check_regex_mod, this] (
- string&& w, const location& l)
+ auto add_word = [&c, &p, &mod, &check_regex_mod, this]
+ (string&& w, const location& l)
{
auto add_merge = [&l, this] (optional<redirect>& r,
const string& w,
@@ -697,11 +702,30 @@ namespace build2
const location ll (get_location (t)); // Line location.
// Keep parsing chunks of the command line until we see one of the
- // "terminators" (newline, exit status comparison, etc).
+ // "terminators" (newline or unknown/unexpected token).
//
location l (ll);
names ns; // Reuse to reduce allocations.
+ bool for_loop (false);
+
+ if (program)
+ {
+ assert (program->type == type::word);
+
+ // Note that here we skip all the parse_program() business since the
+ // program can only be one of the specially-recognized names.
+ //
+ if (program->value == "for")
+ for_loop = true;
+ else
+ assert (false); // Must be specially-recognized program.
+
+ // Save the program name and continue parsing as a command.
+ //
+ add_word (move (program->value), get_location (*program));
+ }
+
for (bool done (false); !done; l = get_location (t))
{
tt = ra.resolve (tt);
@@ -717,6 +741,9 @@ namespace build2
case type::equal:
case type::not_equal:
{
+ if (for_loop)
+ fail (l) << "for-loop exit code cannot be checked";
+
if (!pre_parse_)
check_pending (l);
@@ -747,30 +774,39 @@ namespace build2
}
case type::pipe:
+ if (for_loop)
+ fail (l) << "for-loop must be last command in a pipe";
+ // Fall through.
+
case type::log_or:
case type::log_and:
+ if (for_loop)
+ fail (l) << "command expression involving for-loop";
+ // Fall through.
- case type::in_pass:
- case type::out_pass:
+ case type::clean:
+ if (for_loop)
+ fail (l) << "cleanup in for-loop";
+ // Fall through.
- case type::in_null:
+ case type::out_pass:
case type::out_null:
-
case type::out_trace:
-
case type::out_merge:
-
- case type::in_str:
- case type::in_doc:
case type::out_str:
case type::out_doc:
-
- case type::in_file:
case type::out_file_cmp:
case type::out_file_ovr:
case type::out_file_app:
+ if (for_loop)
+ fail (l) << "output redirect in for-loop";
+ // Fall through.
- case type::clean:
+ case type::in_pass:
+ case type::in_null:
+ case type::in_str:
+ case type::in_doc:
+ case type::in_file:
{
if (pre_parse_)
{
@@ -968,6 +1004,42 @@ namespace build2
next (t, tt);
break;
}
+ case type::lsbrace:
+ {
+ // Recompose the attributes into a single command argument.
+ //
+ assert (!pre_parse_);
+
+ attributes_push (t, tt, true /* standalone */);
+
+ attributes as (attributes_pop ());
+ assert (!as.empty ());
+
+ ostringstream os;
+ names storage;
+ char c ('[');
+ for (const attribute& a: as)
+ {
+ os << c << a.name;
+
+ if (!a.value.null)
+ {
+ os << '=';
+
+ storage.clear ();
+ to_stream (os,
+ reverse (a.value, storage),
+ quote_mode::normal,
+ '@');
+ }
+
+ c = ',';
+ }
+ os << ']';
+
+ add_word (os.str (), l);
+ break;
+ }
default:
{
// Bail out if this is one of the unknown tokens.
@@ -1053,16 +1125,33 @@ namespace build2
bool prog (p == pending::program_first ||
p == pending::program_next);
- // Check if this is the env pseudo-builtin.
+ // Check if this is the env pseudo-builtin or the for-loop.
//
bool env (false);
- if (prog && tt == type::word && t.value == "env")
+ if (prog && tt == type::word)
{
- parsed_env r (parse_env_builtin (t, tt));
- c.cwd = move (r.cwd);
- c.variables = move (r.variables);
- c.timeout = r.timeout;
- env = true;
+ if (t.value == "env")
+ {
+ parsed_env r (parse_env_builtin (t, tt));
+ c.cwd = move (r.cwd);
+ c.variables = move (r.variables);
+ c.timeout = r.timeout;
+ env = true;
+ }
+ else if (t.value == "for")
+ {
+ if (expr.size () > 1)
+ fail (l) << "command expression involving for-loop";
+
+ for_loop = true;
+
+ // Save 'for' as a program name and continue parsing as a
+ // command.
+ //
+ add_word (move (t.value), l);
+ next (t, tt);
+ continue;
+ }
}
// Parse the next chunk as names to get expansion, etc. Note that
@@ -1243,9 +1332,16 @@ namespace build2
switch (tt)
{
case type::pipe:
+ if (for_loop)
+ fail (l) << "for-loop must be last command in a pipe";
+ // Fall through.
+
case type::log_or:
case type::log_and:
{
+ if (for_loop)
+ fail (l) << "command expression involving for-loop";
+
// Check that the previous command makes sense.
//
check_command (l, tt != type::pipe);
@@ -1265,30 +1361,11 @@ namespace build2
break;
}
- case type::in_pass:
- case type::out_pass:
-
- case type::in_null:
- case type::out_null:
-
- case type::out_trace:
-
- case type::out_merge:
-
- case type::in_str:
- case type::out_str:
-
- case type::in_file:
- case type::out_file_cmp:
- case type::out_file_ovr:
- case type::out_file_app:
- {
- parse_redirect (move (t), tt, l);
- break;
- }
-
case type::clean:
{
+ if (for_loop)
+ fail (l) << "cleanup in for-loop";
+
parse_clean (t);
break;
}
@@ -1299,6 +1376,27 @@ namespace build2
fail (l) << "here-document redirect in expansion";
break;
}
+
+ case type::out_pass:
+ case type::out_null:
+ case type::out_trace:
+ case type::out_merge:
+ case type::out_str:
+ case type::out_file_cmp:
+ case type::out_file_ovr:
+ case type::out_file_app:
+ if (for_loop)
+ fail (l) << "output redirect in for-loop";
+ // Fall through.
+
+ case type::in_pass:
+ case type::in_null:
+ case type::in_str:
+ case type::in_file:
+ {
+ parse_redirect (move (t), tt, l);
+ break;
+ }
}
}
@@ -1326,7 +1424,7 @@ namespace build2
expr.back ().pipe.push_back (move (c));
}
- return make_pair (move (expr), move (hd));
+ return parse_command_expr_result {move (expr), move (hd), for_loop};
}
parser::parsed_env parser::
@@ -1575,7 +1673,7 @@ namespace build2
void parser::
parse_here_documents (token& t, type& tt,
- pair<command_expr, here_docs>& p)
+ parse_command_expr_result& pr)
{
// enter: newline
// leave: newline
@@ -1583,7 +1681,7 @@ namespace build2
// Parse here-document fragments in the order they were mentioned on
// the command line.
//
- for (here_doc& h: p.second)
+ for (here_doc& h: pr.docs)
{
// Switch to the here-line mode which is like single/double-quoted
// string but recognized the newline as a separator.
@@ -1603,7 +1701,7 @@ namespace build2
{
auto i (h.redirects.cbegin ());
- command& c (p.first[i->expr].pipe[i->pipe]);
+ command& c (pr.expr[i->expr].pipe[i->pipe]);
optional<redirect>& r (i->fd == 0 ? c.in :
i->fd == 1 ? c.out :
@@ -1635,7 +1733,7 @@ namespace build2
//
for (++i; i != h.redirects.cend (); ++i)
{
- command& c (p.first[i->expr].pipe[i->pipe]);
+ command& c (pr.expr[i->expr].pipe[i->pipe]);
optional<redirect>& ir (i->fd == 0 ? c.in :
i->fd == 1 ? c.out :
@@ -2062,7 +2160,7 @@ namespace build2
else if (n == "elif!") r = line_type::cmd_elifn;
else if (n == "else") r = line_type::cmd_else;
else if (n == "while") r = line_type::cmd_while;
- else if (n == "for") r = line_type::cmd_for;
+ else if (n == "for") r = line_type::cmd_for_stream;
else if (n == "end") r = line_type::cmd_end;
else
{
@@ -2136,10 +2234,11 @@ namespace build2
{
line_type lt (j->type);
- if (lt == line_type::cmd_if ||
- lt == line_type::cmd_ifn ||
- lt == line_type::cmd_while ||
- lt == line_type::cmd_for)
+ if (lt == line_type::cmd_if ||
+ lt == line_type::cmd_ifn ||
+ lt == line_type::cmd_while ||
+ lt == line_type::cmd_for_stream ||
+ lt == line_type::cmd_for_args)
++n;
// If we are nested then we just wait until we get back
@@ -2164,10 +2263,8 @@ namespace build2
if (skip)
{
- // Note that we don't count else and end as commands.
- //
- // @@ Note that for the for-loop's second and third forms
- // will probably need to increment li.
+ // Note that we don't count else, end, and 'for x: ...' as
+ // commands.
//
switch (lt)
{
@@ -2176,8 +2273,9 @@ namespace build2
case line_type::cmd_ifn:
case line_type::cmd_elif:
case line_type::cmd_elifn:
- case line_type::cmd_while: ++li; break;
- default: break;
+ case line_type::cmd_for_stream:
+ case line_type::cmd_while: ++li; break;
+ default: break;
}
}
}
@@ -2221,7 +2319,10 @@ namespace build2
single = true;
}
- exec_cmd (t, tt, ii, li++, single, ll);
+ exec_cmd (t, tt,
+ ii, li++, single,
+ nullptr /* command_function */,
+ ll);
replay_stop ();
break;
@@ -2339,7 +2440,147 @@ namespace build2
break;
}
- case line_type::cmd_for:
+ case line_type::cmd_for_stream:
+ {
+ // The for-loop construct end. Set on the first iteration.
+ //
+ lines::const_iterator fe (e);
+
+ // Let's "wrap up" all the required data into the single object
+ // to rely on the "small function object" optimization.
+ //
+ struct
+ {
+ lines::const_iterator i;
+ lines::const_iterator e;
+ const function<exec_set_function>& exec_set;
+ const function<exec_cmd_function>& exec_cmd;
+ const function<exec_cond_function>& exec_cond;
+ const function<exec_for_function>& exec_for;
+ const iteration_index* ii;
+ size_t& li;
+ variable_pool* var_pool;
+ decltype (fcend)& fce;
+ lines::const_iterator& fe;
+ } d {i, e,
+ exec_set, exec_cmd, exec_cond, exec_for,
+ ii, li,
+ var_pool,
+ fcend,
+ fe};
+
+ function<command_function> cf (
+ [&d, this]
+ (environment& env,
+ const strings& args,
+ auto_fd in,
+ bool pipe,
+ const optional<deadline>& dl,
+ const command& deadline_cmd,
+ const location& ll)
+ {
+ namespace cli = build2::build::cli;
+
+ try
+ {
+ // Parse arguments.
+ //
+ cli::vector_scanner scan (args);
+ for_options ops (scan);
+
+ // Note: diagnostics consistent with the set builtin.
+ //
+ if (ops.whitespace () && ops.newline ())
+ fail (ll) << "for: both -n|--newline and "
+ << "-w|--whitespace specified";
+
+ if (!scan.more ())
+ fail (ll) << "for: missing variable name";
+
+ // Either attributes or variable name.
+ //
+ string a (scan.next ());
+ const string* ats (!scan.more () ? nullptr : &a);
+ string vname (!scan.more () ? move (a) : scan.next ());
+
+ if (scan.more ())
+ fail (ll) << "for: unexpected argument '"
+ << scan.next () << "'";
+
+ if (ats != nullptr && ats->empty ())
+ fail (ll) << "for: empty variable attributes";
+
+ if (vname.empty ())
+ fail (ll) << "for: empty variable name";
+
+ // Let's also diagnose the `... | for x:...` misuse which
+ // can probably be quite common.
+ //
+ if (vname.find (':') != string::npos)
+ fail (ll) << "for: ':' after variable name";
+
+ stream_reader sr (
+ move (in), pipe,
+ ops.whitespace (), ops.newline (), ops.exact (),
+ dl, deadline_cmd,
+ ll);
+
+ // Since the command pipe is parsed, we can stop
+ // replaying. Note that we should do this before calling
+ // exec_lines() for the loop body. Also note that we
+ // should increment the line index before that.
+ //
+ replay_stop ();
+
+ size_t fli (++d.li);
+ iteration_index fi {1, d.ii};
+
+ for (optional<string> s; (s = sr.next ()); )
+ {
+ d.li = fli;
+
+ // Don't move from the variable name since it is used on
+ // each iteration.
+ //
+ env.set_variable (vname,
+ names {name (move (*s))},
+ ats != nullptr ? *ats : empty_string,
+ ll);
+
+ // Find the construct end, if it is not found yet.
+ //
+ if (d.fe == d.e)
+ d.fe = d.fce (d.i, true, false);
+
+ if (!exec_lines (d.i + 1, d.fe,
+ d.exec_set,
+ d.exec_cmd,
+ d.exec_cond,
+ d.exec_for,
+ &fi, d.li,
+ d.var_pool))
+ {
+ throw exit (true);
+ }
+
+ fi.index++;
+ }
+ }
+ catch (const cli::exception& e)
+ {
+ fail (ll) << "for: " << e;
+ }
+ });
+
+ exec_cmd (t, tt, ii, li, false /* single */, cf, ll);
+
+ // Position to construct end.
+ //
+ i = (fe != e ? fe : fcend (i, true, true));
+
+ break;
+ }
+ case line_type::cmd_for_args:
{
// Parse the variable name with the potential attributes.
//
diff --git a/libbuild2/script/parser.hxx b/libbuild2/script/parser.hxx
index 3a4c46f..c402d3e 100644
--- a/libbuild2/script/parser.hxx
+++ b/libbuild2/script/parser.hxx
@@ -97,15 +97,34 @@ namespace build2
};
using here_docs = vector<here_doc>;
- pair<command_expr, here_docs>
- parse_command_expr (token&, token_type&, const redirect_aliases&);
+ struct parse_command_expr_result
+ {
+ command_expr expr; // Single pipe for the for-loop.
+ here_docs docs;
+ bool for_loop = false;
+
+ parse_command_expr_result () = default;
+
+ parse_command_expr_result (command_expr&& e,
+ here_docs&& h,
+ bool f)
+ : expr (move (e)), docs (move (h)), for_loop (f) {}
+ };
+
+ // Pass the first special command program name (token_type::word) if it
+ // is already pre-parsed.
+ //
+ parse_command_expr_result
+ parse_command_expr (token&, token_type&,
+ const redirect_aliases&,
+ optional<token>&& program = nullopt);
command_exit
parse_command_exit (token&, token_type&);
void
parse_here_documents (token&, token_type&,
- pair<command_expr, here_docs>&);
+ parse_command_expr_result&);
struct parsed_doc
{
@@ -135,6 +154,11 @@ namespace build2
// the first two tokens. Use the specified lexer mode to peek the second
// token.
//
+ // Always return the cmd_for_stream line type for the for-loop. Note
+ // that the for-loop form cannot be detected easily, based on the first
+ // two tokens. Also note that the detection can be specific for the
+ // script implementation (custom lexing mode, special variables, etc).
+ //
line_type
pre_parse_line_start (token&, token_type&, lexer_mode);
@@ -169,6 +193,7 @@ namespace build2
using exec_cmd_function = void (token&, token_type&,
const iteration_index*, size_t li,
bool single,
+ const function<command_function>&,
const location&);
using exec_cond_function = bool (token&, token_type&,
diff --git a/libbuild2/script/run.cxx b/libbuild2/script/run.cxx
index 81abdab..b7f3314 100644
--- a/libbuild2/script/run.cxx
+++ b/libbuild2/script/run.cxx
@@ -9,7 +9,8 @@
# include <libbutl/win32-utility.hxx> // DBG_TERMINATE_PROCESS
#endif
-#include <ios> // streamsize
+#include <ios> // streamsize
+#include <cstring> // strchr()
#include <libbutl/regex.hxx>
#include <libbutl/builtin.hxx>
@@ -971,81 +972,201 @@ namespace build2
: path (c.program.recall_string ());
}
- // Read out the stream content into a string. Throw io_error on the
- // underlying OS error.
- //
- // If the execution deadline is specified, then turn the stream into the
- // non-blocking mode reading its content in chunks and with a single
- // operation otherwise. If the specified deadline is reached while
- // reading the stream, then bail out for the successful deadline and
- // fail otherwise. Note that in the former case the result will be
- // incomplete, but we leave it to the caller to handle that.
- //
- // Note that on Windows we can only turn pipe file descriptors into the
- // non-blocking mode. Thus, we have no choice but to read from
- // descriptors of other types synchronously there. That implies that we
- // can potentially block indefinitely reading a file and missing the
- // deadline on Windows. Note though, that the user can normally rewrite
- // the command, for example, `set foo <<<file` with `cat file | set foo`
- // to avoid this problem.
- //
- static string
- read (auto_fd in,
+ stream_reader::
+ stream_reader(auto_fd&& in,
#ifndef _WIN32
- bool,
+ bool,
#else
- bool pipe,
+ bool pipe,
#endif
- const optional<deadline>& dl,
- const command& deadline_cmd,
- const location& ll)
+ bool ws, bool nl, bool ex,
+ const optional<deadline>& dl,
+ const command& dc,
+ const location& l)
+ : whitespace_ (ws),
+ newline_ (nl),
+ exact_ (ex),
+ deadline_cmd_ (dc),
+ location_ (l)
{
- string r;
- ifdstream cin;
-
#ifndef _WIN32
if (dl)
#else
if (dl && pipe)
#endif
{
- fdselect_set fds {in.get ()};
- cin.open (move (in), fdstream_mode::non_blocking);
+ is_.open (move (in), fdstream_mode::non_blocking);
+ deadline_ = dl;
+ }
+ else
+ is_.open (move (in));
+ }
- const timestamp& dlt (dl->value);
+ optional<string> stream_reader::
+ next ()
+ {
+ if (!is_.is_open ())
+ return nullopt;
+
+ // If eos is not reached, then read and return a character. Otherwise
+ // close the stream and return nullopt. If the deadline is specified and
+ // is reached, then return nullopt for the successful deadline (as if
+ // eof is reached) and fail otherwise.
+ //
+ // Set the empty_ flag to false after the first character is read.
+ //
+ auto get = [this] () -> optional<char>
+ {
+ char r;
- for (char buf[4096];; )
+ if (deadline_) // Reading a character in the non-blocking mode.
{
- timestamp now (system_clock::now ());
+ fdselect_set fds {is_.fd ()};
- if (dlt <= now || ifdselect (fds, dlt - now) == 0)
+ // Only fallback to ifdselect() if there is no character immediately
+ // available.
+ //
+ for (;;)
{
- if (!dl->success)
- fail (ll) << cmd_path (deadline_cmd)
- << " terminated: execution timeout expired";
- else
+ streamsize n (is_.readsome (&r, 1));
+
+ if (n == 1)
break;
+
+ if (is_.eof ())
+ {
+ is_.close ();
+ return nullopt;
+ }
+
+ const timestamp& dlt (deadline_->value);
+ timestamp now (system_clock::now ());
+
+ if (dlt <= now || ifdselect (fds, dlt - now) == 0)
+ {
+ is_.close ();
+
+ if (!deadline_->success)
+ fail (location_) << cmd_path (deadline_cmd_)
+ << " terminated: execution timeout expired";
+ else
+ return nullopt;
+ }
+ }
+ }
+ else // Reading a character in the blocking mode.
+ {
+ if (is_.peek () == ifdstream::traits_type::eof ())
+ {
+ is_.close ();
+ return nullopt;
}
- streamsize n (cin.readsome (buf, sizeof (buf)));
+ is_.get (r);
+ }
- // Bail out if eos is reached.
- //
- if (n == 0)
- break;
+ empty_ = false;
+ return r;
+ };
+
+ if (whitespace_) // The whitespace mode.
+ {
+ const char* sep (" \n\r\t");
+
+ // Note that we collapse multiple consecutive whitespaces.
+ //
+ optional<char> c;
+
+ // Skip the whitespaces.
+ //
+ while ((c = get ()) && strchr (sep, *c) != nullptr) ;
- r.append (buf, n);
+ // Bail out for the trailing whitespace(s) or an empty stream.
+ //
+ if (!c)
+ {
+ // Return the trailing "blank" after the trailing whitespaces in the
+ // exact mode, unless the stream is empty.
+ //
+ return exact_ && !empty_ ? empty_string : optional<string> ();
}
+
+ // Read the word until eof or a whitespace character is encountered.
+ //
+ string r (1, *c);
+ while ((c = get ()) && strchr (sep, *c) == nullptr)
+ r += *c;
+
+ return optional<string> (move (r));
}
- else
+ else // The newline or no-split mode.
{
- cin.open (move (in));
- r = cin.read_text ();
- }
+ // Note that we don't collapse multiple consecutive newlines.
+ //
+ // Note also that we always sanitize CRs, so in the no-split mode we
+ // need to loop rather than read the whole text at once.
+ //
+ optional<string> r;
- cin.close ();
+ do
+ {
+ string l;
+ optional<char> c;
- return r;
+ // Read the line until eof or newline character is encountered.
+ //
+ while ((c = get ()) && *c != '\n')
+ l += *c;
+
+ // Strip the trailing CRs that can appear while, for example,
+ // cross-testing Windows target or as a part of msvcrt junk
+ // production (see above).
+ //
+ while (!l.empty () && l.back () == '\r')
+ l.pop_back ();
+
+ // Append the line.
+ //
+ if (!l.empty () || // Non-empty.
+ c || // Empty, non-trailing.
+ (exact_ && // Empty, trailing, in the exact mode for
+ !empty_)) // non-empty stream.
+ {
+ if (newline_ || !r)
+ {
+ r = move (l);
+ }
+ else
+ {
+ *r += '\n';
+ *r += l;
+ }
+ }
+ }
+ while (!newline_ && is_.is_open ());
+
+ return r;
+ }
+ }
+
+ string
+ stream_read (auto_fd&& in,
+ bool pipe,
+ const optional<deadline>& dl,
+ const command& dc,
+ const location& ll)
+ {
+ stream_reader sr (move (in),
+ pipe,
+ false /* whitespace */,
+ false /* newline */,
+ true /* exact */,
+ dl,
+ dc,
+ ll);
+
+ optional<string> s (sr.next ());
+ return s ? move (*s) : empty_string;
}
// The set pseudo-builtin: set variable from the stdin input.
@@ -1087,87 +1208,17 @@ namespace build2
if (vname.empty ())
fail (ll) << "set: empty variable name";
- // Read out the stream content into a string while keeping an eye on
- // the deadline.
- //
- string s (read (move (in), pipe, dl, deadline_cmd, ll));
+ stream_reader sr (move (in), pipe,
+ ops.whitespace (), ops.newline (), ops.exact (),
+ dl, deadline_cmd,
+ ll);
// Parse the stream content into the variable value.
//
names ns;
- if (!s.empty ())
- {
- if (ops.whitespace ()) // The whitespace mode.
- {
- // Note that we collapse multiple consecutive whitespaces.
- //
- for (size_t p (0); p != string::npos; )
- {
- // Skip the whitespaces.
- //
- const char* sep (" \n\r\t");
- size_t b (s.find_first_not_of (sep, p));
-
- if (b != string::npos) // Word beginning.
- {
- size_t e (s.find_first_of (sep, b)); // Find the word end.
- ns.emplace_back (string (s, b, e != string::npos ? e - b : e));
-
- p = e;
- }
- else // Trailings whitespaces.
- {
- // Append the trailing "blank" after the trailing whitespaces
- // in the exact mode.
- //
- if (ops.exact ())
- ns.emplace_back (empty_string);
-
- // Bail out since the end of the string is reached.
- //
- break;
- }
- }
- }
- else // The newline or no-split mode.
- {
- // Note that we don't collapse multiple consecutive newlines.
- //
- // Note also that we always sanitize CRs so this loop is always
- // needed.
- //
- for (size_t p (0); p != string::npos; )
- {
- size_t e (s.find ('\n', p));
- string l (s, p, e != string::npos ? e - p : e);
-
- // Strip the trailing CRs that can appear while, for example,
- // cross-testing Windows target or as a part of msvcrt junk
- // production (see above).
- //
- while (!l.empty () && l.back () == '\r')
- l.pop_back ();
-
- // Append the line.
- //
- if (!l.empty () || // Non-empty.
- e != string::npos || // Empty, non-trailing.
- ops.exact ()) // Empty, trailing, in the exact mode.
- {
- if (ops.newline () || ns.empty ())
- ns.emplace_back (move (l));
- else
- {
- ns[0].value += '\n';
- ns[0].value += l;
- }
- }
-
- p = e != string::npos ? e + 1 : e;
- }
- }
- }
+ for (optional<string> s; (s = sr.next ()); )
+ ns.emplace_back (move (*s));
env.set_variable (move (vname),
move (ns),
@@ -1242,7 +1293,7 @@ namespace build2
const iteration_index* ii, size_t li, size_t ci,
const location& ll,
bool diag,
- string* output,
+ const function<command_function>& cf, bool last_cmd,
optional<deadline> dl = nullopt,
const command* dl_cmd = nullptr, // env -t <cmd>
pipe_command* prev_cmd = nullptr)
@@ -1253,8 +1304,10 @@ namespace build2
//
if (bc == ec)
{
- if (output != nullptr)
+ if (cf != nullptr)
{
+ assert (!last_cmd); // Otherwise we wouldn't be here.
+
// The pipeline can't be empty.
//
assert (ifd != nullfd && prev_cmd != nullptr);
@@ -1263,15 +1316,14 @@ namespace build2
try
{
- *output = read (move (ifd),
- true /* pipe */,
- dl,
- dl_cmd != nullptr ? *dl_cmd : c,
- ll);
+ cf (env, strings () /* arguments */,
+ move (ifd), true /* pipe */,
+ dl, dl_cmd != nullptr ? *dl_cmd : c,
+ ll);
}
catch (const io_error& e)
{
- fail (ll) << "io error reading " << cmd_path (c) << " output: "
+ fail (ll) << "unable to read from " << cmd_path (c) << " output: "
<< e;
}
}
@@ -1329,9 +1381,10 @@ namespace build2
command_pipe::const_iterator nc (bc + 1);
bool last (nc == ec);
- // Make sure that stdout is not redirected if meant to be read.
+ // Make sure that stdout is not redirected if meant to be read (last_cmd
+ // is false) or cannot not be produced (last_cmd is true).
//
- if (last && output != nullptr && c.out)
+ if (last && c.out && cf != nullptr)
fail (ll) << "stdout cannot be redirected";
// True if the process path is not pre-searched and the program path
@@ -1345,7 +1398,7 @@ namespace build2
const redirect& in ((c.in ? *c.in : env.in).effective ());
- const redirect* out (!last || output != nullptr
+ const redirect* out (!last || (cf != nullptr && !last_cmd)
? nullptr // stdout is piped.
: &(c.out ? *c.out : env.out).effective ());
@@ -1413,7 +1466,7 @@ namespace build2
if (c.out)
fail (ll) << program << " builtin stdout cannot be redirected";
- if (output != nullptr)
+ if (cf != nullptr && !last_cmd)
fail (ll) << program << " builtin stdout cannot be read";
if (c.err)
@@ -1620,7 +1673,7 @@ namespace build2
if (c.out)
fail (ll) << "set builtin stdout cannot be redirected";
- if (output != nullptr)
+ if (cf != nullptr && !last_cmd)
fail (ll) << "set builtin stdout cannot be read";
if (c.err)
@@ -1640,6 +1693,39 @@ namespace build2
return true;
}
+ // If this is the last command in the pipe and the command function is
+ // specified for it, then call it.
+ //
+ if (last && cf != nullptr && last_cmd)
+ {
+ // Must be enforced by the caller.
+ //
+ assert (!c.out && !c.err && !c.exit);
+
+ try
+ {
+ cf (env, c.arguments,
+ move (ifd), !first,
+ dl, dl_cmd != nullptr ? *dl_cmd : c,
+ ll);
+ }
+ catch (const io_error& e)
+ {
+ diag_record dr (fail (ll));
+
+ dr << cmd_path (c) << ": unable to read from ";
+
+ if (prev_cmd != nullptr)
+ dr << cmd_path (prev_cmd->cmd) << " output";
+ else
+ dr << "stdin";
+
+ dr << ": " << e;
+ }
+
+ return true;
+ }
+
// Open a file for command output redirect if requested explicitly
// (file overwrite/append redirects) or for the purpose of the output
// validation (none, here_*, file comparison redirects), register the
@@ -2220,7 +2306,7 @@ namespace build2
nc, ec,
move (ofd.in),
ii, li, ci + 1, ll, diag,
- output,
+ cf, last_cmd,
dl, dl_cmd,
&pc);
@@ -2347,7 +2433,7 @@ namespace build2
nc, ec,
move (ofd.in),
ii, li, ci + 1, ll, diag,
- output,
+ cf, last_cmd,
dl, dl_cmd,
&pc);
@@ -2487,7 +2573,7 @@ namespace build2
const iteration_index* ii, size_t li,
const location& ll,
bool diag,
- string* output)
+ const function<command_function>& cf, bool last_cmd)
{
// Commands are numbered sequentially throughout the expression
// starting with 1. Number 0 means the command is a single one.
@@ -2532,7 +2618,7 @@ namespace build2
p.begin (), p.end (),
auto_fd (),
ii, li, ci, ll, print,
- output);
+ cf, last_cmd);
}
ci += p.size ();
@@ -2546,13 +2632,18 @@ namespace build2
const command_expr& expr,
const iteration_index* ii, size_t li,
const location& ll,
- string* output)
+ const function<command_function>& cf,
+ bool last_cmd)
{
// Note that we don't print the expression at any verbosity level
// assuming that the caller does this, potentially providing some
// additional information (command type, etc).
//
- if (!run_expr (env, expr, ii, li, ll, true /* diag */, output))
+ if (!run_expr (env,
+ expr,
+ ii, li, ll,
+ true /* diag */,
+ cf, last_cmd))
throw failed (); // Assume diagnostics is already printed.
}
@@ -2561,11 +2652,15 @@ namespace build2
const command_expr& expr,
const iteration_index* ii, size_t li,
const location& ll,
- string* output)
+ const function<command_function>& cf, bool last_cmd)
{
// Note that we don't print the expression here (see above).
//
- return run_expr (env, expr, ii, li, ll, false /* diag */, output);
+ return run_expr (env,
+ expr,
+ ii, li, ll,
+ false /* diag */,
+ cf, last_cmd);
}
void
diff --git a/libbuild2/script/run.hxx b/libbuild2/script/run.hxx
index 01b010c..5d46d21 100644
--- a/libbuild2/script/run.hxx
+++ b/libbuild2/script/run.hxx
@@ -38,22 +38,24 @@ namespace build2
// Location is the start position of this command line in the script. It
// can be used in diagnostics.
//
- // Optionally, save the command output into the referenced variable. In
- // this case assume that the expression contains a single pipline.
+ // Optionally, execute the specified function at the end of the pipe,
+ // either after the last command or instead of it.
//
void
run (environment&,
const command_expr&,
const iteration_index*, size_t index,
const location&,
- string* output = nullptr);
+ const function<command_function>& = nullptr,
+ bool last_cmd = true);
bool
run_cond (environment&,
const command_expr&,
const iteration_index*, size_t index,
const location&,
- string* output = nullptr);
+ const function<command_function>& = nullptr,
+ bool last_cmd = true);
// Perform the registered special file cleanups in the direct order and
// then the regular cleanups in the reverse order.
@@ -80,6 +82,62 @@ namespace build2
//
string
diag_path (const dir_name_view&);
+
+ // Read out the stream content into a string, optionally splitting the
+ // input data at whitespaces or newlines in which case return one
+ // sub-string at a time (see the set builtin options for the splitting
+ // semantics). Throw io_error on the underlying OS error.
+ //
+ // If the execution deadline is specified, then turn the stream into the
+ // non-blocking mode. If the specified deadline is reached while reading
+ // the stream, then bail out for the successful deadline and fail
+ // otherwise. Note that in the former case the result will be incomplete,
+ // but we leave it to the caller to handle that.
+ //
+ // Note that on Windows we can only turn pipe file descriptors into the
+ // non-blocking mode. Thus, we have no choice but to read from descriptors
+ // of other types synchronously there. That implies that we can
+ // potentially block indefinitely reading a file and missing the deadline
+ // on Windows. Note though, that the user can normally rewrite the
+ // command, for example, `set foo <<<file` with `cat file | set foo` to
+ // avoid this problem.
+ //
+ class stream_reader
+ {
+ public:
+ stream_reader (auto_fd&&,
+ bool pipe,
+ bool whitespace, bool newline, bool exact,
+ const optional<deadline>&,
+ const command& deadline_cmd,
+ const location&);
+
+ // Return nullopt if eos is reached.
+ //
+ optional<string>
+ next ();
+
+ private:
+ ifdstream is_;
+ bool whitespace_;
+ bool newline_;
+ bool exact_;
+ optional<deadline> deadline_;
+ const command& deadline_cmd_;
+ const location& location_;
+
+ bool empty_ = true; // Set to false after the first character is read.
+ };
+
+ // Read the stream content using the stream reader in the no-split exact
+ // mode.
+ //
+ string
+ stream_read (auto_fd&&,
+ bool pipe,
+ const optional<deadline>&,
+ const command& deadline_cmd,
+ const location&);
}
}
diff --git a/libbuild2/script/script.cxx b/libbuild2/script/script.cxx
index 33c4c30..b8dfc68 100644
--- a/libbuild2/script/script.cxx
+++ b/libbuild2/script/script.cxx
@@ -20,16 +20,17 @@ namespace build2
switch (lt)
{
- case line_type::var: s = "variable"; break;
- case line_type::cmd: s = "command"; break;
- case line_type::cmd_if: s = "'if'"; break;
- case line_type::cmd_ifn: s = "'if!'"; break;
- case line_type::cmd_elif: s = "'elif'"; break;
- case line_type::cmd_elifn: s = "'elif!'"; break;
- case line_type::cmd_else: s = "'else'"; break;
- case line_type::cmd_while: s = "'while'"; break;
- case line_type::cmd_for: s = "'for'"; break;
- case line_type::cmd_end: s = "'end'"; break;
+ case line_type::var: s = "variable"; break;
+ case line_type::cmd: s = "command"; break;
+ case line_type::cmd_if: s = "'if'"; break;
+ case line_type::cmd_ifn: s = "'if!'"; break;
+ case line_type::cmd_elif: s = "'elif'"; break;
+ case line_type::cmd_elifn: s = "'elif!'"; break;
+ case line_type::cmd_else: s = "'else'"; break;
+ case line_type::cmd_while: s = "'while'"; break;
+ case line_type::cmd_for_args: s = "'for'"; break;
+ case line_type::cmd_for_stream: s = "'for'"; break;
+ case line_type::cmd_end: s = "'end'"; break;
}
return o << s;
@@ -227,7 +228,8 @@ namespace build2
case line_type::cmd_elifn:
case line_type::cmd_else:
case line_type::cmd_while:
- case line_type::cmd_for: fc_ind += " "; break;
+ case line_type::cmd_for_args:
+ case line_type::cmd_for_stream: fc_ind += " "; break;
default: break;
}
diff --git a/libbuild2/script/script.hxx b/libbuild2/script/script.hxx
index 5eb4ee9..aa96b7f 100644
--- a/libbuild2/script/script.hxx
+++ b/libbuild2/script/script.hxx
@@ -28,7 +28,8 @@ namespace build2
cmd_elifn,
cmd_else,
cmd_while,
- cmd_for,
+ cmd_for_args, // `for x: ...`
+ cmd_for_stream, // `... | for x` and `for x <...`
cmd_end
};
@@ -42,7 +43,7 @@ namespace build2
union
{
- const variable* var; // Pre-entered for line_type::var.
+ const variable* var; // Pre-entered for line_type::{var,cmd_for_*}.
};
};
@@ -547,7 +548,7 @@ namespace build2
// Set variable value with optional (non-empty) attributes.
//
virtual void
- set_variable (string&& name,
+ set_variable (string name,
names&&,
const string& attrs,
const location&) = 0;
@@ -580,6 +581,17 @@ namespace build2
~environment () = default;
};
+ // Custom command function that can be executed at the end of the pipe.
+ // Should throw io_error on the underlying OS error.
+ //
+ using command_function = void (environment&,
+ const strings& args,
+ auto_fd in,
+ bool pipe,
+ const optional<deadline>&,
+ const command& deadline_cmd,
+ const location&);
+
// Helpers.
//
// Issue diagnostics with the specified prefix and fail if the string