Make buildtab target to be non-optional

4 files changed, 23 insertions, 42 deletions

diff --git a/libbbot/build-config.cxx b/libbbot/build-config.cxx
index f18c48a..855b093 100644
--- a/libbbot/build-config.cxx
+++ b/libbbot/build-config.cxx
@@ -63,39 +63,26 @@ namespace bbot
       // Make sure the name is unique.
       //
       for (const auto& c: r)
+      {
         if (c.name == config.name)
           bad_line ("duplicate configuration name");
+      }
 
-      // If there is no target nor configuration variables then save the
-      // configuration and proceed with the next line.
-      //
       if (++i == n)
+        bad_line ("no target found");
+
+      try
       {
-        r.emplace_back (move (config));
-        continue;
+        config.target = target_triplet (tl[i].value);
       }
-
-      // If the third field doesn't start with '~' character and doesn't
-      // contain '=' character, then we will treat it as a target.
-      //
-      const string& v (tl[i].value);
-      if (v[0] != '~' && v.find ('=') == string::npos)
+      catch (const invalid_argument& e)
       {
-        try
-        {
-          config.target = target_triplet (v);
-        }
-        catch (const invalid_argument& e)
-        {
-          bad_line (e.what ());
-        }
-
-        ++i;
+        bad_line (e.what ());
       }
 
       try
       {
-        for (; i < n; ++i)
+        for (++i; i < n; ++i)
         {
           string& v (tl[i].value);
 
diff --git a/libbbot/build-config.hxx b/libbbot/build-config.hxx
index 363b889..de78739 100644
--- a/libbbot/build-config.hxx
+++ b/libbbot/build-config.hxx
@@ -10,7 +10,6 @@
 #include <iosfwd>
 
 #include <libbutl/path.hxx>
-#include <libbutl/optional.hxx>
 #include <libbutl/tab-parser.hxx>
 #include <libbutl/target-triplet.hxx>
 
@@ -24,14 +23,12 @@ namespace bbot
   //
   struct build_config
   {
-    std::string machine_pattern; // Machine name pattern.
-    std::string name;            // Configuration name.
+    std::string machine_pattern;   // Machine name pattern.
+    std::string name;              // Configuration name.
+    butl::target_triplet target;
+    std::vector<std::string> vars; // Note: quoting is preserved.
 
-    butl::optional<butl::target_triplet> target;
-
-    std::vector<std::string> vars;
-
-    // Warning-detecting regular expressions.
+    // Warning-detecting regular expressions. Note that quoting is preserved.
     //
     std::vector<std::string> warning_regexes;
   };
@@ -43,7 +40,7 @@ namespace bbot
   //
   // buildtab consists of lines in the following format:
   //
-  // <machine-pattern> <config> [<target>] [<config-vars>] [<warning-regex>]
+  // <machine-pattern> <config> <target> [<config-vars>] [<warning-regex>]
   //
   using butl::tab_parsing;
 
diff --git a/libbbot/manifest.cxx b/libbbot/manifest.cxx
index dae6e3e..8a2ebaa 100644
--- a/libbbot/manifest.cxx
+++ b/libbbot/manifest.cxx
@@ -517,7 +517,7 @@ namespace bbot
       }
       else if (n == "target")
       {
-        if (target)
+        if (!target.empty ())
           bad_name ("task target redefinition");
 
         try
@@ -566,6 +566,9 @@ namespace bbot
 
     if (machine.empty ())
       bad_value ("no task machine specified");
+
+    if (target.empty ())
+      bad_value ("no task target specified");
   }
 
   void task_manifest::
@@ -583,9 +586,7 @@ namespace bbot
       s.next ("trust", v);
 
     s.next ("machine", machine);
-
-    if (target)
-      s.next ("target", target->string ());
+    s.next ("target", target.string ());
 
     // Serialize an optional value of the strings type as a space-separated
     // string list.
diff --git a/libbbot/manifest.hxx b/libbbot/manifest.hxx
index 36f2f5b..cd0ddfe 100644
--- a/libbbot/manifest.hxx
+++ b/libbbot/manifest.hxx
@@ -117,13 +117,9 @@ namespace bbot
     //
     strings trust;
 
-    // Build machine to use for building the package.
-    //
-    std::string machine;
+    std::string machine; // Build machine to use for building the package.
 
-    // Default for the machine if absent.
-    //
-    butl::optional<butl::target_triplet> target;
+    butl::target_triplet target;
 
     // Build system configuration variables (in addition to build environment
     // configuration variables).
@@ -148,7 +144,7 @@ namespace bbot
                    bpkg::repository_location rl,
                    strings tr,
                    std::string mn,
-                   butl::optional<butl::target_triplet> tg,
+                   butl::target_triplet tg,
                    strings cf,
                    strings wr)
         : name (std::move (nm)),