bug#27250: [PATCH] gnu: crawl: Update to 0.20.0.

[nee <nee@cock.li>]

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Am 05.06.2017 um 16:14 schrieb Arun Isaac:
> 
> Thanks! LGTM. Only one problem: crawl-upgrade-saves.patch seems to have
> trailing whitespace, and git is complaining about that. Use `git diff
> --check' on your commit to see what I mean. Could you fix this and send
> a new patch?
> 
> gnu/packages/patches/crawl-upgrade-saves.patch:17: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:32: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:40: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:55: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:63: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:68: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:75: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:81: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:84: trailing whitespace.
> ++ 
> gnu/packages/patches/crawl-upgrade-saves.patch:92: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:100: trailing whitespace.
> +  
> gnu/packages/patches/crawl-upgrade-saves.patch:111: trailing whitespace.
> ++ 
> gnu/packages/patches/crawl-upgrade-saves.patch:115: trailing whitespace.
> +  
> 
I ran git diff --check HEAD~ on my branch and saw the same warnings.
I don't know much about diff and patch, though.
What is the correct diff command to generate a patch? I used `diff -crB
database.cc database2.cc > crawl-upgrade-saves.patch` and then edited
the header myself.
Searching for 'diff ' or 'patch' on
https://www.gnu.org/software/guix/manual/guix.html doesn't bring up
anything related.

I did some comparison with other files in ./gnu/packages/patches/ and it
seems like `diff -u` generates the format that most files in there have.
But it still leaves one trailing whitespace in empty lines. Other .patch
files have those too.

I attached the commit with the .patch file generated in the diff -u
format instead of diff -c.

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From bdcc845e3ff430762efc22af82c54f58c65763f4 Mon Sep 17 00:00:00 2001
From: nee <nee.git@cock.li>
Date: Sun, 4 Jun 2017 17:19:41 +0200
Subject: [PATCH] gnu: crawl: Update to 0.20.0.

* gnu/packages/games.scm (crawl)[source]: Add a patch to fix savegame
  upgrades. Update to 0.20.0.
* gnu/packages/patches/crawl-upgrade-saves.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add patch.
---
 gnu/local.mk                                   |  1 +
 gnu/packages/games.scm                         |  5 +-
 gnu/packages/patches/crawl-upgrade-saves.patch | 83 ++++++++++++++++++++++++++
 3 files changed, 87 insertions(+), 2 deletions(-)
 create mode 100644 gnu/packages/patches/crawl-upgrade-saves.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index e7d5ee2f4..b8a85494d 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -550,6 +550,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/cpufrequtils-fix-aclocal.patch		\
   %D%/packages/patches/cracklib-CVE-2016-6318.patch		\
   %D%/packages/patches/cracklib-fix-buffer-overflow.patch	\
+  %D%/packages/patches/crawl-upgrade-saves.patch		\
   %D%/packages/patches/crda-optional-gcrypt.patch		\
   %D%/packages/patches/crossmap-allow-system-pysam.patch	\
   %D%/packages/patches/csound-header-ordering.patch		\
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index c1993485b..c2c24f3c8 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -3955,7 +3955,7 @@ fish.  The whole game is accompanied by quiet, comforting music.")
 (define-public crawl
   (package
     (name "crawl")
-    (version "0.19.5")
+    (version "0.20.0")
     (source
      (origin
        (method url-fetch)
@@ -3969,7 +3969,8 @@ fish.  The whole game is accompanied by quiet, comforting music.")
                             version "-nodeps.tar.xz")))
        (sha256
         (base32
-         "00yl2lb2shglxlxzpyk99zvglfx4amjybqwnzdcasvbiggb4cj18"))))
+         "0127dgldij2h4m7cf32yy9ndv4vcz03g4km71lmxrsi5mw7ljgpd"))
+       (patches (search-patches "crawl-upgrade-saves.patch"))))
     (build-system gnu-build-system)
     (inputs
      `(("lua51" ,lua-5.1)
diff --git a/gnu/packages/patches/crawl-upgrade-saves.patch b/gnu/packages/patches/crawl-upgrade-saves.patch
new file mode 100644
index 000000000..301942dc3
--- /dev/null
+++ b/gnu/packages/patches/crawl-upgrade-saves.patch
@@ -0,0 +1,83 @@
+Store the crawl version in the textdatabases in SAVEDIR and
+upgrade the databases when the crawl version changes.
+
+By default crawl checks for a mtime difference on files in DATADIR to see if an
+upgrade is required, but guix nulls all file dates,
+and crawl would never upgrade saves.
+
+--- a/source/database.cc	2016-05-31 09:56:08.000000000 +0200
++++ a/source/database.cc	2017-06-05 03:00:19.270632107 +0200
+@@ -25,6 +25,7 @@
+ #include "syscalls.h"
+ #include "threads.h"
+ #include "unicode.h"
++#include "version.h"
+ 
+ // TextDB handles dependency checking the db vs text files, creating the
+ // db, loading, and destroying the DB.
+@@ -55,6 +56,7 @@
+     vector<string> _input_files;
+     DBM* _db;
+     string timestamp;
++    string version;
+     TextDB *_parent;
+     const char* lang() { return _parent ? Options.lang_name : 0; }
+ public:
+@@ -165,7 +167,7 @@
+ 
+ TextDB::TextDB(const char* db_name, const char* dir, ...)
+     : _db_name(db_name), _directory(dir),
+-      _db(nullptr), timestamp(""), _parent(0), translation(0)
++      _db(nullptr), timestamp(""), version(""),  _parent(0), translation(0)
+ {
+     va_list args;
+     va_start(args, dir);
+@@ -187,7 +189,7 @@
+     : _db_name(parent->_db_name),
+       _directory(parent->_directory + Options.lang_name + "/"),
+       _input_files(parent->_input_files), // FIXME: pointless copy
+-      _db(nullptr), timestamp(""), _parent(parent), translation(nullptr)
++      _db(nullptr), timestamp(""), version(""), _parent(parent), translation(nullptr)
+ {
+ }
+ 
+@@ -202,6 +204,9 @@
+         return false;
+ 
+     timestamp = _query_database(*this, "TIMESTAMP", false, false, true);
++    version = _query_database(*this, "VERSION", false, false, true);
++    if (version.empty())
++        return false;
+     if (timestamp.empty())
+         return false;
+ 
+@@ -245,6 +250,9 @@
+     string ts;
+     bool no_files = true;
+ 
++    if (string(Version::Long) != version)
++        return true;
++
+     for (const string &file : _input_files)
+     {
+         string full_input_path = _directory + file;
+@@ -261,7 +269,7 @@
+         ts += buf;
+     }
+ 
+-    if (no_files && timestamp.empty())
++    if (no_files && timestamp.empty() && version.empty())
+     {
+         // No point in empty databases, although for simplicity keep ones
+         // for disappeared translations for now.
+@@ -321,7 +329,10 @@
+             _store_text_db(full_input_path, _db);
+         }
+     }
++
++    string current_version = string(Version::Long);
+     _add_entry(_db, "TIMESTAMP", ts);
++    _add_entry(_db, "VERSION", current_version);
+ 
+     dbm_close(_db);
+     _db = 0;
-- 
2.13.0