45 lines
2.2 KiB
Bash
45 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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## Hooks
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# A honeypot wishful hooking. To make sure the whole thing works.
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# This is exactly the kind of hooking this extension is meant to detect.
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# This will never run, and should be detected below, but is handled specially and ignored.
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# Note: this will never run, since we (hopefully) don't have a hook_point called 'wishful_hooking_example'.
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function wishful_hooking_example__this_will_never_run() {
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echo "WISHFUL HOOKING -- this will never run. I promise."
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}
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# Run super late, hopefully at the last possible moment.
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function extension_metadata_ready__999_detect_wishful_hooking() {
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display_alert "Checking extensions and hooks for uncalled hook points"
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declare -i found_honeypot_function=0
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# Loop over the defined functions' keys. Find the info about the call. If not found, warn the user.
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# shellcheck disable=SC2154 # hook-exported variable
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for one_defined_function in ${!defined_hook_point_functions[*]}; do
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local source_info defined_info line_info
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defined_info="${defined_hook_point_functions["${one_defined_function}"]}"
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source_info="${hook_point_function_trace_sources["${one_defined_function}"]}"
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line_info="${hook_point_function_trace_lines["${one_defined_function}"]}"
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stack="$(get_extension_hook_stracktrace "${source_info}" "${line_info}")"
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if [[ "$source_info" != "" ]]; then
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display_alert "Hook function stacktrace for '${one_defined_function}'" "${stack}" "extensionstrace"
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continue # found a caller, move on.
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fi
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# special handling for the honeypot function. it is supposed to be always detected as uncalled.
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if [[ "${one_defined_function}" == "wishful_hooking_example__this_will_never_run" ]]; then
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# we expect this wishful hooking, it is done on purpose below, to make sure this code works.
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found_honeypot_function=1
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else
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# unexpected wishful hooking. Log and wrn the user.
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display_alert "Wishful hooking detected" "Function '${one_defined_function}' is defined (${defined_info}) but never called by the build." "wrn"
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fi
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done
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if [[ $found_honeypot_function -lt 1 ]]; then
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display_alert "Wishful hook DETECTION FAILED" "detect-wishful-hooking is not working. Good chance the environment vars are corrupted. Avoid child shells. Sorry." "wrn"
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fi
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}
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