ci: Fix the reporting in ci_lint.sh

The variable `CI_LINT_COUNTER` was incremented inside subshells, but
remained unchanged in the main shell process. The errors detected by
the internal linters remained unreported by the main script. (Oopsie!)

Besides fixing this defect, considering that only a pass/fail status
is needed, we are replacing `CI_LINT_COUNTER` with `CI_LINT_STATUS`.

ci/ci_lint.sh

@@ -17,8 +17,8 @@ CI_SHELLCHECK="${CI_SHELLCHECK:-shellcheck}"
 CI_EDITORCONFIG_CHECKER="${CI_EDITORCONFIG_CHECKER:-editorconfig-checker}"
 CI_YAMLLINT="${CI_YAMLLINT:-yamllint}"
 
-# Initialize the global lint counter.
-CI_LINT_COUNTER=0
+# Initialize the global lint status.
+CI_LINT_STATUS=0
 
 function ci_init_lint {
     ci_info "## START OF LINTING ##"
@@ -45,14 +45,13 @@ function ci_init_lint {
 
 function ci_finish_lint {
     ci_info "## END OF LINTING ##"
-    if [[ $CI_LINT_COUNTER -eq 0 ]]
+    if [[ $CI_LINT_STATUS -eq 0 ]]
     then
         ci_info "## SUCCESS ##"
-        return 0
     else
         ci_info "linting failed"
-        return 1
     fi
+    return "$CI_LINT_STATUS"
 }
 
 function ci_lint_ci_scripts {
@@ -61,15 +60,17 @@ function ci_lint_ci_scripts {
         return 0
     }
     ci_info "## LINTING: CI scripts ##"
-    {
+    ci_spawn "$CI_SHELLCHECK" --version
+    find ./ci -name "*.sh" -perm +111 | {
         local my_file
-        ci_spawn "$CI_SHELLCHECK" --version
-        find ./ci -maxdepth 1 -name "*.sh" |
-            while IFS="" read -r my_file
-            do
-                ci_spawn "$CI_SHELLCHECK" -x "$my_file"
-            done
-    } || CI_LINT_COUNTER=$((CI_LINT_COUNTER + 1))
+        while IFS="" read -r my_file
+        do
+            ci_spawn "$CI_SHELLCHECK" -x "$my_file" || {
+                # Linting failed.
+                return 1
+            }
+        done
+    }
 }
 
 function ci_lint_text_files {
@@ -80,7 +81,8 @@ function ci_lint_text_files {
     ci_info "## LINTING: text files ##"
     ci_spawn "$CI_EDITORCONFIG_CHECKER" --version
     ci_spawn "$CI_EDITORCONFIG_CHECKER" || {
-        CI_LINT_COUNTER=$((CI_LINT_COUNTER + 1))
+        # Linting failed.
+        return 1
     }
 }
 
@@ -90,22 +92,24 @@ function ci_lint_yaml_files {
         return 0
     }
     ci_info "## LINTING: YAML files ##"
-    {
+    ci_spawn "$CI_YAMLLINT" --version
+    find . \( -iname "*.yml" -o -iname "*.yaml" \) -not -path "./out/*" | {
         local my_file
-        ci_spawn "$CI_YAMLLINT" --version
-        find . \( -iname "*.yml" -o -iname "*.yaml" \) -not -path "./out/*" |
-            while IFS="" read -r my_file
-            do
-                ci_spawn "$CI_YAMLLINT" --strict "$my_file"
-            done
-    } || CI_LINT_COUNTER=$((CI_LINT_COUNTER + 1))
+        while IFS="" read -r my_file
+        do
+            ci_spawn "$CI_YAMLLINT" --strict "$my_file" || {
+                # Linting failed.
+                return 1
+            }
+        done
+    }
 }
 
 function ci_lint {
     ci_init_lint
-    ci_lint_ci_scripts
-    ci_lint_text_files
-    ci_lint_yaml_files
+    ci_lint_ci_scripts || CI_LINT_STATUS=1
+    ci_lint_text_files || CI_LINT_STATUS=1
+    ci_lint_yaml_files || CI_LINT_STATUS=1
     # TODO: ci_lint_png_files, etc.
     ci_finish_lint
 }