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-rw-r--r--pkgs/build-support/release/default.nix2
-rw-r--r--pkgs/build-support/release/nix-build.nix29
-rw-r--r--pkgs/build-support/setup-hooks/enable-coverage-instrumentation.sh14
-rw-r--r--pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh18
4 files changed, 36 insertions, 27 deletions
diff --git a/pkgs/build-support/release/default.nix b/pkgs/build-support/release/default.nix
index 3d593f0b6bb7..acad3487dad2 100644
--- a/pkgs/build-support/release/default.nix
+++ b/pkgs/build-support/release/default.nix
@@ -27,7 +27,7 @@ rec {
     } // args);
 
   coverageAnalysis = args: nixBuild (
-    { inherit lcov;
+    { inherit lcov enableCoverageInstrumentation makeCoverageAnalysisReport;
       doCoverageAnalysis = true;
     } // args);
 
diff --git a/pkgs/build-support/release/nix-build.nix b/pkgs/build-support/release/nix-build.nix
index 88bafd84faa3..42533b0094aa 100644
--- a/pkgs/build-support/release/nix-build.nix
+++ b/pkgs/build-support/release/nix-build.nix
@@ -15,6 +15,7 @@
 , failureHook ? null
 , prePhases ? []
 , postPhases ? []
+, buildInputs ? []
 , ... } @ args:
 
 stdenv.mkDerivation (
@@ -61,13 +62,6 @@ stdenv.mkDerivation (
       . ${./functions.sh}
       origSrc=$src
       src=$(findTarballs $src | head -1)
-
-      # Set GCC flags for coverage analysis, if desired.
-      if test -n "${toString doCoverageAnalysis}"; then
-          export NIX_CFLAGS_COMPILE="-O0 --coverage $NIX_CFLAGS_COMPILE"
-          export CFLAGS="-O0"
-          export CXXFLAGS="-O0"
-      fi
     '';
 
     initPhase = ''
@@ -85,30 +79,13 @@ stdenv.mkDerivation (
 
     prePhases = ["initPhase"] ++ prePhases;
 
-    # In the report phase, create a coverage analysis report.
-    coverageReportPhase = if doCoverageAnalysis then ''
-      ${args.lcov}/bin/lcov --directory . --capture --output-file app.info
-      set -o noglob
-      ${args.lcov}/bin/lcov --remove app.info $lcovFilter > app2.info
-      set +o noglob
-      mv app2.info app.info
-
-      mkdir $out/coverage
-      ${args.lcov}/bin/genhtml app.info $lcovExtraTraceFiles -o $out/coverage > log
-
-      # Grab the overall coverage percentage for use in release overviews.
-      grep "Overall coverage rate" log | sed 's/^.*(\(.*\)%).*$/\1/' > $out/nix-support/coverage-rate
-
-      echo "report coverage $out/coverage" >> $out/nix-support/hydra-build-products
-    '' else "";
-
+    buildInputs = buildInputs ++ [ args.makeCoverageAnalysisReport ];
 
     lcovFilter = ["/nix/store/*"] ++ lcovFilter;
 
     inherit lcovExtraTraceFiles;
 
-    postPhases = postPhases ++
-      (stdenv.lib.optional doCoverageAnalysis "coverageReportPhase") ++ ["finalPhase"];
+    postPhases = postPhases ++ ["finalPhase"];
 
     meta = (if args ? meta then args.meta else {}) // {
       description = if doCoverageAnalysis then "Coverage analysis" else "Nix package for ${stdenv.system}";
diff --git a/pkgs/build-support/setup-hooks/enable-coverage-instrumentation.sh b/pkgs/build-support/setup-hooks/enable-coverage-instrumentation.sh
new file mode 100644
index 000000000000..08ef490e2447
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/enable-coverage-instrumentation.sh
@@ -0,0 +1,14 @@
+# Force GCC to build with coverage instrumentation.  Also disable
+# optimisation, since it may confuse things.
+export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -O0 --coverage"
+
+# FIXME: Handle the case where postUnpack is already set.
+postUnpack() {
+    # This is an uberhack to prevent libtool from remoaving gcno
+    # files.  This has been fixed in libtool, but there are packages
+    # out there with old ltmain.sh scripts.  See
+    # http://www.mail-archive.com/libtool@gnu.org/msg10725.html
+    for i in $(find -name ltmain.sh); do
+        substituteInPlace $i --replace '*.$objext)' '*.$objext | *.gcno)'
+    done
+}
diff --git a/pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh b/pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh
new file mode 100644
index 000000000000..2951666651c6
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh
@@ -0,0 +1,18 @@
+postPhases+=" coverageReportPhase"
+
+coverageReportPhase() {
+    lcov --directory . --capture --output-file app.info
+    set -o noglob
+    lcov --remove app.info $lcovFilter > app2.info
+    set +o noglob
+    mv app2.info app.info
+
+    mkdir -p $out/coverage
+    genhtml app.info $lcovExtraTraceFiles -o $out/coverage > log
+
+    # Grab the overall coverage percentage for use in release overviews.
+    mkdir -p $out/nix-support
+    grep "Overall coverage rate" log | sed 's/^.*(\(.*\)%).*$/\1/' > $out/nix-support/coverage-rate
+
+    echo "report coverage $out/coverage" >> $out/nix-support/hydra-build-products
+}