Allow the configuration file and theme directory to be specified at run time.

Patch by Eelco Dolstra, from Nixpkgs.
---
 app.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/app.cpp b/app.cpp
index 237477d..735df9c 100644
--- a/app.cpp
+++ b/app.cpp
@@ -285,7 +285,9 @@ void App::Run()
 	if ( cfg == 0 )
 	{
 		cfg = new Cfg;
-		cfg->readConf(CFGFILE);
+		const char* cfgfile = getenv("SLIM_CFGFILE");
+		if (!cfgfile) cfgfile = CFGFILE;
+		cfg->readConf(cfgfile);
 	}
 	string themebase = "";
 	string themefile = "";
@@ -297,7 +299,9 @@ void App::Run()
 	}
 	else
 	{
-		themebase = string(THEMESDIR) + "/";
+		const char* themesdir = getenv("SLIM_THEMESDIR");
+		if (!themesdir) themesdir = THEMESDIR;
+		themebase = string(themesdir) + "/";
 		themeName = cfg->getOption("current_theme");
 		string::size_type pos;
 		if ((pos = themeName.find(",")) != string::npos)
-- 
2.39.2

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<tr><td><span title='2023-01-09 17:40:54 +0100'>2023-01-09</span></td><td><a href='/guix/commit/nix/libutil/hash.cc?id=407175a1d0e29f45639e7f28a531b3981cd20085'>daemon: Improve error message for wrong hash sizes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libutil/hash.cc (parseHash): Show the hash algorithm name and
expected size in the error message.
* tests/derivations.scm ("fixed-output derivation, invalid hash size"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-18 01:16:47 +0100'>2022-12-18</span></td><td><a href='/guix/commit/nix/libutil/hash.cc?id=2d4d26769d6a3be1b21302b0bb2bd099fd55ccf8'>daemon: Make "opening file" error messages distinguishable.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc (DerivationGoal::openLogFile): Customize
"opening file" error message.
* nix/libutil/hash.cc (hashFile): Likewise.
* nix/libutil/util.cc (readFile, writeFile): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>