From 256eeab7112da2d5fe1629ffb8b86640a894ee6d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 4 May 2004 12:15:30 +0000
Subject: * Allow the location of the store etc. to be specified using  
 environment variables. * Started adding some automatic tests. * Do a `make
 check' when building RPMs.

---
 src/libmain/shared.cc | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

(limited to 'src/libmain')

diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 42f17cf4edea..fce42710610e 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -46,27 +46,34 @@ void checkStoreNotSymlink(Path path)
 }
 
 
+static string getEnv(const string & key, const string & def = "")
+{
+    char * value = getenv(key.c_str());
+    return value ? string(value) : def;
+}
+
+
 /* Initialize and reorder arguments, then call the actual argument
    processor. */
 static void initAndRun(int argc, char * * argv)
 {
-    char * root = getenv("NIX_ROOT");
-
-    if (root) {
-        if (chroot(root) != 0)
+    string root = getEnv("NIX_ROOT");
+    if (root != "") {
+        if (chroot(root.c_str()) != 0)
             throw SysError(format("changing root to `%1%'") % root);
     }
     
     /* Setup Nix paths. */
-    nixStore = canonPath(NIX_STORE_DIR);
-    nixDataDir = canonPath(NIX_DATA_DIR);
-    nixLogDir = canonPath(NIX_LOG_DIR);
-    nixStateDir = canonPath(NIX_STATE_DIR);
-    nixDBPath = canonPath(NIX_STATE_DIR) + "/db";
+    nixStore = getEnv("NIX_STORE_DIR", canonPath(NIX_STORE_DIR));
+    nixDataDir = getEnv("NIX_DATA_DIR", canonPath(NIX_DATA_DIR));
+    nixLogDir = getEnv("NIX_LOG_DIR", canonPath(NIX_LOG_DIR));
+    nixStateDir = getEnv("NIX_STATE_DIR", canonPath(NIX_STATE_DIR));
+    nixDBPath = getEnv("NIX_DB_DIR", nixStateDir + "/db");
 
     /* Check that the store directory and its parent are not
        symlinks. */
-    checkStoreNotSymlink(nixStore);
+    if (getEnv("NIX_IGNORE_SYMLINK_STORE") != "1")
+        checkStoreNotSymlink(nixStore);
 
     /* Catch SIGINT. */
     struct sigaction act, oact;
@@ -77,8 +84,8 @@ static void initAndRun(int argc, char * * argv)
         throw SysError("installing handler for SIGINT");
 
     /* Process the NIX_LOG_TYPE environment variable. */
-    char * lt = getenv("NIX_LOG_TYPE");
-    if (lt) setLogType(lt);
+    string lt = getEnv("NIX_LOG_TYPE");
+    if (lt != "") setLogType(lt);
 
     /* Put the arguments in a vector. */
     Strings args, remaining;
-- 
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