From a7a3cf206851b5896d938efa34a142aa1f0649b0 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 21 Feb 2022 06:24:27 +0200
Subject: Factor additional logic to parse_cmdline()

---
 libbuild2/cmdline.cxx | 76 +++++++++++++++++++++++++++++++++++++++++++++++++--
 libbuild2/cmdline.hxx | 19 +++++++++++--
 2 files changed, 90 insertions(+), 5 deletions(-)

(limited to 'libbuild2')

diff --git a/libbuild2/cmdline.cxx b/libbuild2/cmdline.cxx
index a5f9616..e022762 100644
--- a/libbuild2/cmdline.cxx
+++ b/libbuild2/cmdline.cxx
@@ -9,6 +9,7 @@
 #include <libbutl/default-options.hxx>
 
 #include <libbuild2/b-options.hxx>
+#include <libbuild2/scheduler.hxx>
 #include <libbuild2/diagnostics.hxx>
 
 using namespace std;
@@ -19,18 +20,24 @@ namespace cli = build2::build::cli;
 namespace build2
 {
   cmdline
-  parse_cmdline (tracer& trace, int argc, char* argv[], options& ops)
+  parse_cmdline (tracer& trace,
+                 int argc, char* argv[],
+                 options& ops,
+                 uint16_t def_verb,
+                 size_t def_jobs)
   {
     // Note that the diagnostics verbosity level can only be calculated after
     // default options are loaded and merged (see below). Thus, until then we
     // refer to the verbosity level specified on the command line.
     //
-    auto verbosity = [&ops] ()
+    auto verbosity = [&ops, def_verb] ()
     {
       uint16_t v (
         ops.verbose_specified ()
         ? ops.verbose ()
-        : ops.V () ? 3 : ops.v () ? 2 : ops.quiet () || ops.silent () ? 0 : 1);
+        : (ops.V () ? 3 :
+           ops.v () ? 2 :
+           ops.quiet () || ops.silent () ? 0 : def_verb));
       return v;
     };
 
@@ -397,12 +404,75 @@ namespace build2
       fail << e;
     }
 
+    if (ops.help () || ops.version ())
+      return r;
+
     r.verbosity = verbosity ();
 
     if (ops.silent () && r.verbosity != 0)
       fail << "specified with -v, -V, or --verbose verbosity level "
            << r.verbosity << " is incompatible with --silent";
 
+    r.progress = (ops.progress ()    ? optional<bool> (true)  :
+                  ops.no_progress () ? optional<bool> (false) : nullopt);
+
+    r.mtime_check = (ops.mtime_check ()    ? optional<bool> (true)  :
+                     ops.no_mtime_check () ? optional<bool> (false) : nullopt);
+
+
+    r.config_sub = (ops.config_sub_specified ()
+                    ? optional<path> (ops.config_sub ())
+                    : nullopt);
+
+    r.config_guess = (ops.config_guess_specified ()
+                      ? optional<path> (ops.config_guess ())
+                      : nullopt);
+
+    if (ops.jobs_specified ())
+      r.jobs = ops.jobs ();
+    else if (ops.serial_stop ())
+      r.jobs = 1;
+
+    if (def_jobs != 0)
+      r.jobs = def_jobs;
+    else
+    {
+      if (r.jobs == 0)
+        r.jobs = scheduler::hardware_concurrency ();
+
+      if (r.jobs == 0)
+      {
+        warn << "unable to determine the number of hardware threads" <<
+          info << "falling back to serial execution" <<
+          info << "use --jobs|-j to override";
+
+        r.jobs = 1;
+      }
+    }
+
+    if (ops.max_jobs_specified ())
+    {
+      r.max_jobs = ops.max_jobs ();
+
+      if (r.max_jobs != 0 && r.max_jobs < r.jobs)
+        fail << "invalid --max-jobs|-J value";
+    }
+
+    r.max_stack = (ops.max_stack_specified ()
+                   ? optional<size_t> (ops.max_stack () * 1024)
+                   : nullopt);
+
+    if (ops.file_cache_specified ())
+    {
+      const string& v (ops.file_cache ());
+      if (v == "noop" || v == "none")
+        r.fcache_compress = false;
+      else if (v == "sync-lz4")
+        r.fcache_compress = true;
+      else
+        fail << "invalid --file-cache value '" << v << "'";
+    }
+
     return r;
   }
 }
diff --git a/libbuild2/cmdline.hxx b/libbuild2/cmdline.hxx
index 7bf41c2..56e9510 100644
--- a/libbuild2/cmdline.hxx
+++ b/libbuild2/cmdline.hxx
@@ -19,11 +19,26 @@ namespace build2
   {
     strings cmd_vars;
     string buildspec;
-    uint16_t verbosity;
+
+    // Processed/meged option values (unless --help or --version specified).
+    //
+    uint16_t verbosity = 1;
+    optional<bool> progress;
+    optional<bool> mtime_check;
+    optional<path> config_sub;
+    optional<path> config_guess;
+    size_t jobs = 0;
+    size_t max_jobs = 0;
+    optional<size_t> max_stack;
+    bool fcache_compress = true;
   };
 
   LIBBUILD2_SYMEXPORT cmdline
-  parse_cmdline (tracer&, int argc, char* argv[], options&);
+  parse_cmdline (tracer&,
+                 int argc, char* argv[],
+                 options&,
+                 uint16_t default_verbosity = 1,
+                 size_t default_jobs = 0);
 }
 
 #endif // LIBBUILD2_CMDLINE_HXX
-- 
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