From f619db022734dff6b988c514e3a292a5c7babaf0 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 22 Feb 2018 15:02:15 +0300
Subject: Invent repository_state() function

---
 bpkg/manifest-utility.cxx | 18 ++++++++++++++++++
 bpkg/manifest-utility.hxx | 13 +++++++++++++
 bpkg/pkg-checkout.cxx     |  4 +---
 bpkg/rep-fetch.cxx        | 11 ++++-------
 4 files changed, 36 insertions(+), 10 deletions(-)

(limited to 'bpkg')

diff --git a/bpkg/manifest-utility.cxx b/bpkg/manifest-utility.cxx
index 27e2553..ed50298 100644
--- a/bpkg/manifest-utility.cxx
+++ b/bpkg/manifest-utility.cxx
@@ -4,6 +4,8 @@
 
 #include <bpkg/manifest-utility.hxx>
 
+#include <libbutl/sha256.mxx>
+
 #include <bpkg/diagnostics.hxx>
 
 using namespace std;
@@ -124,4 +126,20 @@ namespace bpkg
   {
     fail << "failed to guess repository type for '" << s << "': " << e << endf;
   }
+
+  dir_path
+  repository_state (const repository_location& l)
+  {
+    switch (l.type ())
+    {
+    case repository_type::bpkg: return dir_path (); // No state.
+    case repository_type::git:
+      {
+        return dir_path (sha256 (l.canonical_name ()).abbreviated_string (16));
+      }
+    }
+
+    assert (false); // Can't be here.
+    return dir_path ();
+  }
 }
diff --git a/bpkg/manifest-utility.hxx b/bpkg/manifest-utility.hxx
index f4dadb4..f672ba7 100644
--- a/bpkg/manifest-utility.hxx
+++ b/bpkg/manifest-utility.hxx
@@ -40,6 +40,19 @@ namespace bpkg
   //
   repository_location
   parse_location (const char*, optional<repository_type>);
+
+  // Return the repository state subdirectory for the specified location as it
+  // appears under .bpkg/repositories/ in the bpkg configuration. Return empty
+  // directory if the repository type doesn't have any state.
+  //
+  // Note that the semantics used to produce this name is repository type-
+  // specific and can base on the repository canonical name or (potentially a
+  // subset of) the location URL. In particular, a state directory could be
+  // shared by multiple repository locations of the same type (@@ TODO: if we
+  // ever do this, then we will need to complicate the removal logic).
+  //
+  dir_path
+  repository_state (const repository_location&);
 }
 
 #endif // BPKG_MANIFEST_UTILITY_HXX
diff --git a/bpkg/pkg-checkout.cxx b/bpkg/pkg-checkout.cxx
index 7377b8e..f068b54 100644
--- a/bpkg/pkg-checkout.cxx
+++ b/bpkg/pkg-checkout.cxx
@@ -4,8 +4,6 @@
 
 #include <bpkg/pkg-checkout.hxx>
 
-#include <libbutl/sha256.mxx>
-
 #include <libbpkg/manifest.hxx>
 
 #include <bpkg/package.hxx>
@@ -118,7 +116,7 @@ namespace bpkg
     //
     dir_path sd (c / repos_dir);
 
-    sd /= dir_path (sha256 (rl.canonical_name ()).abbreviated_string (16));
+    sd /= repository_state (rl);
     sd /= dir_path (pl->fragment);
     sd /= path_cast<dir_path> (pl->location);
 
diff --git a/bpkg/rep-fetch.cxx b/bpkg/rep-fetch.cxx
index fc59ed9..3956c5a 100644
--- a/bpkg/rep-fetch.cxx
+++ b/bpkg/rep-fetch.cxx
@@ -4,7 +4,6 @@
 
 #include <bpkg/rep-fetch.hxx>
 
-#include <libbutl/sha256.mxx>
 #include <libbutl/process.mxx>
 #include <libbutl/process-io.mxx>      // operator<<(ostream, process_path)
 #include <libbutl/manifest-parser.mxx>
@@ -15,6 +14,7 @@
 #include <bpkg/package-odb.hxx>
 #include <bpkg/database.hxx>
 #include <bpkg/diagnostics.hxx>
+#include <bpkg/manifest-utility.hxx>
 
 using namespace std;
 using namespace butl;
@@ -152,12 +152,9 @@ namespace bpkg
 
     // Clone or fetch the repository.
     //
-    // If changing the repository directory naming scheme, then don't forget
-    // to also update pkg_checkout().
-    //
-    dir_path h (sha256 (rl.canonical_name ()).abbreviated_string (16));
+    dir_path sd (repository_state (rl));
 
-    auto_rmdir rm (temp_dir / h);
+    auto_rmdir rm (temp_dir / sd);
     dir_path& td (rm.path);
 
     if (exists (td))
@@ -170,7 +167,7 @@ namespace bpkg
     bool fetch (false);
     if (conf != nullptr)
     {
-      rd = *conf / repos_dir / h;
+      rd = *conf / repos_dir / sd;
 
       if (exists (rd))
       {
-- 
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