stdenv/stripHash: print to stdout, not to variable

`stripHash` documentation states that it prints out the stripped name to
the stdout, but the function stored the value in `strippedName`
instead.

Basically all usages did something like
`$(stripHash $foo | echo $strippedName)` which is just braindamaged.
Fixed the implementation and all invocations.

doc/stdenv.xml

···
     <term><function>stripHash</function>
     <replaceable>path</replaceable></term>
     <listitem><para>Strips the directory and hash part of a store
-    path, storing the name part in the environment variable
-    <literal>strippedName</literal>. For example:
+    path, outputting the name part to <literal>stdout</literal>.
+    For example:
     
 <programlisting>
+# prints coreutils-8.24
 stripHash "/nix/store/9s9r019176g7cvn2nvcw41gsp862y6b4-coreutils-8.24"
-# prints coreutils-8.24
-echo $strippedName
 </programlisting>
 
     If you wish to store the result in another variable, then the
···
     
 <programlisting>
 name="/nix/store/9s9r019176g7cvn2nvcw41gsp862y6b4-coreutils-8.24"
-someVar=$(stripHash $name; echo $strippedName)
+someVar=$(stripHash $name)
 </programlisting>
 
     </para></listitem>

nixos/doc/manual/release-notes/rl-1703.xml

···
       which prevents ptracing non-child processes.
       This means you will not be able to attach gdb to an existing process,
       but will need to start that process from gdb (so it is a child).
+  </listitem>
+
+  <listitem>
+    <para>
+      The <literal>stripHash</literal> bash function in <literal>stdenv</literal>
+      changed according to its documentation; it now outputs the stripped name to
+      <literal>stdout</literal> instead of putting it in the variable
+      <literal>strippedName</literal>.
     </para>
   </listitem>
 </itemizedlist>

nixos/modules/services/networking/ircd-hybrid/builder.sh

···
     if test "$(echo $i | cut -c1-2)" = "=>"; then
         subDir=$(echo $i | cut -c3-)
     else
-        dst=$out/$subDir/$((stripHash $i; echo $strippedName) | sed 's/\.in//')
+        dst=$out/$subDir/$(stripHash $i | sed 's/\.in//')
         doSub $i $dst
         chmod +x $dst # !!!
     fi
···
     if test "$(echo $i | cut -c1-2)" = "=>"; then
         subDir=$(echo $i | cut -c3-)
     else
-        dst=$out/$subDir/$((stripHash $i; echo $strippedName) | sed 's/\.in//')
+        dst=$out/$subDir/$(stripHash $i | sed 's/\.in//')
         doSub $i $dst
     fi
 done

pkgs/build-support/vm/default.nix

···
 
       # Hacky: RPM looks for <basename>.spec inside the tarball, so
       # strip off the hash.
-      stripHash "$src"
-      srcName="$strippedName"
+      srcName="$(stripHash "$src")"
       cp "$src" "$srcName" # `ln' doesn't work always work: RPM requires that the file is owned by root
 
       export HOME=/tmp/home

pkgs/data/fonts/droid/default.nix

···
   sourceRoot = "./";
 
   unpackCmd = ''
-    ttfName=$(basename $(stripHash $curSrc; echo $strippedName))
+    ttfName=$(basename $(stripHash $curSrc))
     cp $curSrc ./$ttfName
   '';
 

pkgs/data/fonts/roboto-mono/default.nix

···
   sourceRoot = "./";
 
   unpackCmd = ''
-    ttfName=$(basename $(stripHash $curSrc; echo $strippedName))
+    ttfName=$(basename $(stripHash $curSrc))
     cp $curSrc ./$ttfName
   '';
 

pkgs/data/fonts/roboto-slab/default.nix

···
   sourceRoot = "./";
 
   unpackCmd = ''
-    ttfName=$(basename $(stripHash $curSrc; echo $strippedName))
+    ttfName=$(basename $(stripHash $curSrc))
     cp $curSrc ./$ttfName
   '';
 

pkgs/data/sgml+xml/schemas/xml-dtd/docbook-ebnf/builder.sh

···
 mkdir -p $out/xml/dtd/docbook-ebnf
 cd $out/xml/dtd/docbook-ebnf
 cp -p $dtd dbebnf.dtd
-stripHash $catalog
-cp -p $catalog $strippedName
+cp -p $catalog $(stripHash $catalog)

pkgs/stdenv/generic/setup.sh

···
 stripHash() {
     strippedName=$(basename $1);
     if echo "$strippedName" | grep -q '^[a-z0-9]\{32\}-'; then
-        strippedName=$(echo "$strippedName" | cut -c34-)
+        echo "$strippedName" | cut -c34-
     fi
 }
 

pkgs/tools/typesetting/tex/nix/animatedot.sh

···
 
 for ((i = 1; i <= $nrFrames; i++)); do
     echo "producing frame $i...";
-    targetName=$out/$(basename $(stripHash $dotGraph; echo $strippedName) .dot)-f-$i.dot
+    targetName=$out/$(basename $(stripHash $dotGraph) .dot)-f-$i.dot
     cpp -DFRAME=$i < $dotGraph > $targetName
 done

pkgs/tools/typesetting/tex/nix/default.nix

···
         if test -d $postscript; then
           input=$(ls $postscript/*.ps)
         else
-          input=$(stripHash $postscript; echo $strippedName)
+          input=$(stripHash $postscript)
           ln -s $postscript $input
         fi
 

pkgs/tools/typesetting/tex/nix/dot2pdf.sh

···
 
 dot2pdf() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .dot).pdf
+    targetName=$out/$(basename $(stripHash $sourceFile) .dot).pdf
     echo "converting $sourceFile to $targetName..."
     export FONTCONFIG_FILE=$fontsConf
     dot -Tpdf $sourceFile > $targetName

pkgs/tools/typesetting/tex/nix/dot2ps.sh

···
 
 dot2ps() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .dot).ps
+    targetName=$out/$(basename $(stripHash $sourceFile) .dot).ps
     echo "converting $sourceFile to $targetName..."
     dot -Tps $sourceFile > $targetName
 }

pkgs/tools/typesetting/tex/nix/lhs2tex.sh

···
 
 lhstex() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .lhs).tex
+    targetName=$out/$(basename $(stripHash $sourceFile) .lhs).tex
     echo "converting $sourceFile to $targetName..."
     lhs2TeX -o "$targetName" $flags "$sourceFile"
 }

pkgs/tools/typesetting/tex/nix/run-latex.sh

···
     if test -d $i; then
         ln -s $i/* .
     else
-        ln -s $i $(stripHash $i; echo $strippedName)
+        ln -s $i $(stripHash $i)
     fi
 done
 
-rootName=$(basename $(stripHash "$rootFile"; echo $strippedName))
+rootName=$(basename $(stripHash "$rootFile"))
 
 rootNameBase=$(echo "$rootName" | sed 's/\..*//')