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authorEelco Dolstra <e.dolstra@tudelft.nl>2005-02-14T17·35+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2005-02-14T17·35+0000
commit8992fce3da844e3cfc7cbc563cbf5313980c16dd (patch)
treeaf637cfba0fccea836877d43cd950f7aab93f164 /src/nix-env
parente446d342b77e0babb200afd6b6275df2c70cfaee (diff)
* It is now possible to add store derivations or paths directly to a
  user environment, e.g.,

    $ nix-env -i /nix/store/z58v41v21xd3ywrqk1vmvdwlagjx7f10-aterm-2.3.1.drv

  or 

    $ nix-env -i /nix/store/hsyj5pbn0d9iz7q0aj0fga7cpaadvp1l-aterm-2.3.1

  This is useful because it allows Nix expressions to be bypassed
  entirely.  For instance, if only a nix-pull manifest is provided,
  plus the top-level path of some component, it can be installed
  without having to supply the Nix expression (e.g., for obfuscation,
  or to be independent of Nix expression language changes or context
  dependencies).

Diffstat (limited to 'src/nix-env')
-rw-r--r--src/nix-env/main.cc39
1 files changed, 38 insertions, 1 deletions
diff --git a/src/nix-env/main.cc b/src/nix-env/main.cc
index a250413ab1ad..bab1f7fe1434 100644
--- a/src/nix-env/main.cc
+++ b/src/nix-env/main.cc
@@ -2,6 +2,7 @@
 #include "names.hh"
 #include "globals.hh"
 #include "build.hh"
+#include "gc.hh"
 #include "shared.hh"
 #include "parser.hh"
 #include "eval.hh"
@@ -226,6 +227,12 @@ static void createUserEnv(EvalState & state, const UserEnvElems & elems,
             ));
         manifest = ATinsert(manifest, t);
         inputs = ATinsert(inputs, makeStr(toATerm(i->second.outPath)));
+
+        /* This is only necessary when installing store paths, e.g.,
+           `nix-env -i /nix/store/abcd...-foo'. */
+        addTempRoot(i->second.outPath);
+        ensurePath(i->second.outPath);
+        
         references.insert(i->second.outPath);
         if (drvPath != "") references.insert(drvPath);
     }
@@ -270,7 +277,11 @@ static void queryInstSources(EvalState & state,
     const InstallSourceInfo & instSource, const Strings & args,
     UserEnvElems & elems)
 {
-    switch (instSource.type) {
+    InstallSourceType type = instSource.type;
+    if (type == srcUnknown && args.size() > 0 && args.front()[0] == '/')
+        type = srcStorePaths;
+    
+    switch (type) {
 
         /* Get the available user environment elements from the
            derivations specified in a Nix expression, including only
@@ -333,6 +344,32 @@ static void queryInstSources(EvalState & state,
             break;
 
         case srcStorePaths:
+
+            for (Strings::const_iterator i = args.begin();
+                 i != args.end(); ++i)
+            {
+                assertStorePath(*i);
+
+                UserEnvElem elem;
+                string name = baseNameOf(*i);
+                unsigned int dash = name.find('-');
+                if (dash != string::npos)
+                    name = string(name, dash + 1);
+
+                if (isDerivation(*i)) {
+                    elem.drvPath = *i;
+                    elem.outPath = findOutput(derivationFromPath(*i), "out");
+                    if (name.size() >= drvExtension.size() &&
+                        string(name, name.size() - drvExtension.size()) == drvExtension)
+                        name = string(name, 0, name.size() - drvExtension.size());
+                }
+                else elem.outPath = *i;
+
+                elem.name = name;
+
+                elems[elem.outPath] = elem;
+            }
+            
             break;
 
         case srcProfile: