* Sort `nix-env -q' output by derivation name.

* `--version' flag for all commands.
* Manual updates.

4 files changed, 28 insertions, 11 deletions

diff --git a/src/libmain/Makefile.am b/src/libmain/Makefile.am
index a4969ff36..6d70b0406 100644
--- a/src/libmain/Makefile.am
+++ b/src/libmain/Makefile.am
@@ -7,4 +7,5 @@ AM_CXXFLAGS = \
  -DNIX_DATA_DIR=\"$(datadir)\" \
  -DNIX_STATE_DIR=\"$(localstatedir)/nix\" \
  -DNIX_LOG_DIR=\"$(localstatedir)/log/nix\" \
+ -DNIX_VERSION=\"$(VERSION)\" \
  -I.. -I../../externals/inst/include -I../libutil -I../libstore
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index e91ef2667..32f4f8124 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -70,6 +70,9 @@ static void initAndRun(int argc, char * * argv)
         else if (arg == "--help") {
             printHelp();
             return;
+        } else if (arg == "--version") {
+            cout << format("%1% (Nix) %2%") % programId % NIX_VERSION << endl;
+            return;
         } else if (arg == "--keep-failed" || arg == "-K")
             keepFailed = true;
         else remaining.push_back(arg);
diff --git a/src/nix-env/help.txt b/src/nix-env/help.txt
index 823f5213a..f1419cdf7 100644
--- a/src/nix-env/help.txt
+++ b/src/nix-env/help.txt
@@ -21,7 +21,7 @@ name `*' may be used to indicate all derivations.
 Query types:
 
   --name: print derivation names (default)
-  --expr / -e: print derivation store expression
+  --expr: print derivation store expression
   --status / -s: print installed/present status
 
 Query sources:
diff --git a/src/nix-env/main.cc b/src/nix-env/main.cc
index a2e9b119a..0fd4ec63a 100644
--- a/src/nix-env/main.cc
+++ b/src/nix-env/main.cc
@@ -29,6 +29,7 @@ struct DrvInfo
 };
 
 typedef map<Path, DrvInfo> DrvInfos;
+typedef vector<DrvInfo> DrvInfoList;
 
 
 void printHelp()
@@ -547,6 +548,12 @@ static void opUninstall(Globals & globals,
 }
 
 
+static bool cmpDrvByName(const DrvInfo & a, const DrvInfo & b)
+{
+    return a.name < b.name;
+}
+
+
 static void opQuery(Globals & globals,
     Strings opFlags, Strings opArgs)
 {
@@ -556,7 +563,7 @@ static void opQuery(Globals & globals,
     for (Strings::iterator i = opFlags.begin();
          i != opFlags.end(); ++i)
         if (*i == "--name") query = qName;
-        else if (*i == "--expr" || *i == "-e") query = qDrvPath;
+        else if (*i == "--expr") query = qDrvPath;
         else if (*i == "--status" || *i == "-s") query = qStatus;
         else if (*i == "--installed") source = sInstalled;
         else if (*i == "--available" || *i == "-a") source = sAvailable;
@@ -580,19 +587,25 @@ static void opQuery(Globals & globals,
     }
 
     if (opArgs.size() != 0) throw UsageError("no arguments expected");
+
+    /* Sort them by name. */
+    DrvInfoList drvs2;
+    for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i)
+        drvs2.push_back(i->second);
+    sort(drvs2.begin(), drvs2.end(), cmpDrvByName);
     
     /* Perform the specified query on the derivations. */
     switch (query) {
 
         case qName: {
-            for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i)
-                cout << format("%1%\n") % i->second.name;
+            for (DrvInfoList::iterator i = drvs2.begin(); i != drvs2.end(); ++i)
+                cout << format("%1%\n") % i->name;
             break;
         }
         
         case qDrvPath: {
-            for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i)
-                cout << format("%1%\n") % i->second.drvPath;
+            for (DrvInfoList::iterator i = drvs2.begin(); i != drvs2.end(); ++i)
+                cout << format("%1%\n") % i->drvPath;
             break;
         }
         
@@ -605,14 +618,14 @@ static void opQuery(Globals & globals,
                  i != installed.end(); ++i)
                 installedPaths.insert(i->second.outPath);
             
-            for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) {
-                Paths subs = querySubstitutes(i->second.drvPath);
+            for (DrvInfoList::iterator i = drvs2.begin(); i != drvs2.end(); ++i) {
+                Paths subs = querySubstitutes(i->drvPath);
                 cout << format("%1%%2%%3% %4%\n")
-                    % (installedPaths.find(i->second.outPath)
+                    % (installedPaths.find(i->outPath)
                         != installedPaths.end() ? 'I' : '-')
-                    % (isValidPath(i->second.outPath) ? 'P' : '-')
+                    % (isValidPath(i->outPath) ? 'P' : '-')
                     % (subs.size() > 0 ? 'S' : '-')
-                    % i->second.name;
+                    % i->name;
             }
             break;
         }