[librsvg: 1/2] coverage: Oops, ignore cargo_cache as well

[Marge Bot <marge-bot src gnome org>]

commit 01793b836f4bd9e69c5bca8ccc42718a1f6dbde7
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Jun 15 12:07:56 2022 -0500

    coverage: Oops, ignore cargo_cache as well
    
    We don't want coverage data for dependencies.
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/710>

 ci/gen-coverage.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/ci/gen-coverage.sh b/ci/gen-coverage.sh
index 871b22038..0b780b575 100644
--- a/ci/gen-coverage.sh
+++ b/ci/gen-coverage.sh
@@ -8,6 +8,19 @@ call_grcov() {
     output_type=$1
     output_path=$2
 
+    # Explanation of the options below:
+    # grcov coverage-profiles _build               - paths where to find .rawprof (llvm) and .gcda (gcc) 
files, respectively
+    #       --binary-path ./_build/target/debug/   - where the Rust test binaries are located
+    #       --source-dir .                         - toplevel source directory
+    #       --prefix-dir ../../                    - prefix to remove from C source files, since they are 
relative to builddir
+    #       --branch                               - compute branch coverage if possible
+    #       --ignore build.rs                      - https://github.com/mozilla/grcov/issues/845
+    #       --ignore '**/build/markup5ever*'       - ignore generated code from dependencies
+    #       --ignore '**/build/cssparser*'         - ignore generated code from dependencies
+    #       --ignore 'cargo_cache/*'               - ignore code from dependencies
+    #       --output-type $output_type
+    #       --output-path $output_path
+
     grcov coverage-profiles _build               \
           --binary-path ./_build/target/debug/   \
           --source-dir .                         \
@@ -16,6 +29,7 @@ call_grcov() {
           --ignore build.rs                      \
           --ignore '**/build/markup5ever*'       \
           --ignore '**/build/cssparser*'         \
+          --ignore 'cargo_cache/*'               \
           --output-type $output_type             \
           --output-path $output_path
 }