philroche · August 2, 2024 12:37
diff --git a/find-wolfi-dependencies.sh b/find-wolfi-dependencies.sh
 #!/bin/bash -eu
 # Find all packages dependent on a given package across all wolfi package repositories
 # Usage: ./find-wolfi-dependencies.sh <package_to_query>
 # Example: ./find-wolfi-dependencies.sh "python3"

 # package_to_query is the package name to query and is required
 # If package_to_query is not provided, the script will exit with an error
 package_to_query=${1:-}
 if [ -z "${package_to_query}" ]; then
  echo "Usage: ${0} <package_to_query>"
  exit 1
 fi


 package_indices_to_query=(
  "https://packages.cgr.dev/os/x86_64/APKINDEX.tar.gz"  # enterprise_packages
  "https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz" # wolfi packages
  "https://packages.cgr.dev/extras/x86_64/APKINDEX.tar.gz" # extra packages
 )

 for package_index in "${package_indices_to_query[@]}"; do
  # This command is taken from a dependency search @ https://apk.dag.dev/
  echo "INDEX : ${package_index}"
  curl --silent --location ${package_index} | 
      tar --extract --to-stdout --ungzip APKINDEX | # See https://wiki.alpinelinux.org/wiki/Apk_spec#APKINDEX_Format for the format of an APKINDEX file
      # This awk command will parse the APKINDEX file and list all packages and their dependencies on one space sepearated line
      awk -F':' ' # This sets the field separator to a colon (:). This means that awk will split each line into fields based on colons.
          $1 == "P" {printf "%s", $2} # If the first field ($1) is "P" (Package name), it prints the second field ($2) followed by a hyphen (-).
          $1 == "D" { printf " %s", substr($0, 3)} # If the first field ($1) is "D" (dependencies), it prints a space followed by the entire line starting from the third character (substr($0, 3)).
          /^$/ {printf "\n"}' | # If the line is empty (/^$/), it prints a newline character (\n).
      grep --invert-match "^${package_to_query} " | # remove the package name itself from the list
      grep "${package_to_query}" | #  grep for the provided package name
      cut --delimiter=" " --fields=1 | # if found then print only the package name and not the dependencies  
      sort | # sort the package names alphabetically
      uniq # only print unique package names
 done
	#!/bin/bash -eu
	# Find all packages dependent on a given package across all wolfi package repositories
	# Usage: ./find-wolfi-dependencies.sh <package_to_query>
	# Example: ./find-wolfi-dependencies.sh "python3"

	# package_to_query is the package name to query and is required
	# If package_to_query is not provided, the script will exit with an error
	package_to_query=${1:-}
	if [ -z "${package_to_query}" ]; then
	echo "Usage: ${0} <package_to_query>"
	exit 1
	fi


	package_indices_to_query=(
	"https://packages.cgr.dev/os/x86_64/APKINDEX.tar.gz" # enterprise_packages
	"https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz" # wolfi packages
	"https://packages.cgr.dev/extras/x86_64/APKINDEX.tar.gz" # extra packages
	)

	for package_index in "${package_indices_to_query[@]}"; do
	# This command is taken from a dependency search @ https://apk.dag.dev/
	echo "INDEX : ${package_index}"
	curl --silent --location ${package_index} \|
	tar --extract --to-stdout --ungzip APKINDEX \| # See https://wiki.alpinelinux.org/wiki/Apk_spec#APKINDEX_Format for the format of an APKINDEX file
	# This awk command will parse the APKINDEX file and list all packages and their dependencies on one space sepearated line
	awk -F':' ' # This sets the field separator to a colon (:). This means that awk will split each line into fields based on colons.
	$1 == "P" {printf "%s", $2} # If the first field ($1) is "P" (Package name), it prints the second field ($2) followed by a hyphen (-).
	$1 == "D" { printf " %s", substr($0, 3)} # If the first field ($1) is "D" (dependencies), it prints a space followed by the entire line starting from the third character (substr($0, 3)).
	/^$/ {printf "\n"}' \| # If the line is empty (/^$/), it prints a newline character (\n).
	grep --invert-match "^${package_to_query} " \| # remove the package name itself from the list
	grep "${package_to_query}" \| # grep for the provided package name
	cut --delimiter=" " --fields=1 \| # if found then print only the package name and not the dependencies
	sort \| # sort the package names alphabetically
	uniq # only print unique package names
	done