significantly better script

Scripts/prepare-coverage-reports.sh

@@ -1,25 +1,45 @@
 #!/bin/zsh -l
 set -e
 
-mkdir -p .build/artifacts
-
 root=$(git rev-parse --show-toplevel)
 
+function exportlcov() {
+    build_type=$1
+    executable=$2
+    profile=$3
+
+    can_proceed=true
+    if ! test -f $executable; then
+        echo "\tCould not find executable for $build_type"
+        can_proceed=false
+    fi
+
+    if ! test -f $profile; then
+        echo "\tCould not find profile for $build_type"
+        can_proceed=false
+    fi
+
+    if $can_proceed; then
+        output_dir=".build/artifacts/$build_type"
+        mkdir -p $output_dir
+
+        output_file="$output_dir/$(basename $executable).lcov"
+        echo "\tExporting $output_file"
+        xcrun llvm-cov export -format="lcov" $executable -instr-profile $profile > $output_file
+    else
+        echo "\tAborting creation of lcov file for $build_type"
+    fi
+}
+
 for directory in $root/.build/derivedData/*/; do
     build_type=$(basename $directory)
     echo "Finding coverage information for $build_type"
 
+    profile=$(find "${directory}" -type f -name 'Coverage.profdata')
+
     cache_advance_tests_executable=$(find "${directory}" -type f -name 'CacheAdvanceTests')
-    echo "Found executable $cache_advance_tests_executable"
-    cache_advance_tests_profile=$(find "${directory}" -type f -name 'Coverage.profdata')
-    echo "Found profile $cache_advance_tests_profile"
-    exho "Exporting CacheAdvance_$build_type.lcov"
-    xcrun llvm-cov export -format="lcov" $cache_advance_tests_executable -instr-profile $cache_advance_tests_profile > .build/artifacts/CacheAdvance_$build_type.lcov
+    exportlcov $build_type $cache_advance_tests_executable $profile
 
     cad_cache_advance_tests_executable=$(find "${directory}" -type f -name 'CADCacheAdvanceTests')
-    echo "Found executable $cad_cache_advance_tests_executable"
-    cad_cache_advance_tests_profile=$(find "${directory}" -type f -name 'Coverage.profdata')
-    echo "Found profile $cad_cache_advance_tests_executable"
-    exho "Exporting CADCacheAdvance_$build_type.lcov"
-    xcrun llvm-cov export -format="lcov" $cache_advance_tests_executable -instr-profile $cache_advance_tests_profile > .build/artifacts/CADCacheAdvance_$build_type.lcov
+    exportlcov $build_type $cad_cache_advance_tests_executable $profile
 done