1 files changed, 84 insertions, 0 deletions
diff --git a/pkgs/build-support/build-fhs-chrootenv/default.nix b/pkgs/build-support/build-fhs-chrootenv/default.nix
new file mode 100644
index 000000000000..8756c4835b29
--- /dev/null
+++ b/pkgs/build-support/build-fhs-chrootenv/default.nix
@@ -0,0 +1,84 @@
+{stdenv, glibc, glibcLocales, gcc, coreutils, diffutils, findutils, gnused, gnugrep, gnutar, gzip, bzip2, 
+bashInteractive, xz, shadow, gawk, less, buildEnv}:
+{name, pkgs ? [], profile ? ""}:
+
+let
+  basePkgs = [ glibc glibcLocales gcc coreutils diffutils findutils gnused gnugrep gnutar gzip bzip2 
+bashInteractive xz shadow gawk less ];
+
+  # Compose a global profile for the chroot environment
+  profilePkg = stdenv.mkDerivation {
+    name = "${name}-chrootenv-profile";
+    buildCommand = ''
+      mkdir -p $out/etc
+      cat >> $out/etc/profile << "EOF"
+      export PS1='${name}-chrootenv:\u@\h:\w\$ '
+      ${profile}
+      EOF
+    '';
+  };
+
+  paths = basePkgs ++ [ profilePkg ] ++ pkgs;
+
+  # Composes a /usr like directory structure
+  staticUsrProfile = buildEnv {
+    name = "system-profile";
+    inherit paths;
+  };
+  
+  # References to shell scripts that set up or tear down the environment
+  initSh = ./init.sh.in;
+  mountSh = ./mount.sh.in;
+  loadSh = ./load.sh.in;
+  umountSh = ./umount.sh.in;
+  destroySh = ./destroy.sh.in;                                                                                       
+in                                                                                                                   
+stdenv.mkDerivation {                                                                                                
+  name = "${name}-chrootenv";                                                                                        
+  buildCommand = ''                                                                                                  
+    mkdir -p $out/sw                                                                                                 
+    cd $out/sw                                                                                                       
+                                                                                                                     
+    for i in ${staticUsrProfile}/{etc,bin,lib{,32,64},sbin,var}                                                      
+    do                                                                                                               
+        if [ -x "$i" ]
+        then
+            ln -s "$i"
+        fi
+    done
+    
+    ln -s ${staticUsrProfile} usr
+    
+    cd ..
+    
+    mkdir -p bin
+    cd bin
+    
+    sed -e "s|@chrootEnv@|$out|g" \
+        -e "s|@name@|${name}|g" \
+        -e "s|@shell@|${stdenv.shell}|g" \
+        ${initSh} > init-${name}-chrootenv
+    chmod +x init-${name}-chrootenv
+    
+    sed -e "s|@shell@|${stdenv.shell}|g" \
+        -e "s|@name@|${name}|g" \
+        ${mountSh} > mount-${name}-chrootenv
+    chmod +x mount-${name}-chrootenv
+    
+    sed -e "s|@shell@|${stdenv.shell}|g" \
+        -e "s|@name@|${name}|g" \
+        ${loadSh} > load-${name}-chrootenv
+    chmod +x load-${name}-chrootenv
+    
+    sed -e "s|@shell@|${stdenv.shell}|g" \
+        -e "s|@name@|${name}|g" \
+        ${umountSh} > umount-${name}-chrootenv
+    chmod +x umount-${name}-chrootenv
+    
+    sed -e "s|@chrootEnv@|$out|g" \
+        -e "s|@shell@|${stdenv.shell}|g" \
+        -e "s|@name@|${name}|g" \
+        ${destroySh} > destroy-${name}-chrootenv
+    chmod +x destroy-${name}-chrootenv
+  '';
+}