cpt-checksum: add option to use sha256 digest

FossilOrigin-Name: 2bac5faea6f21388a494d2d0db913b339e88f1b5a9320176ee3b7be2fc0e0002

2 files changed, 25 insertions, 9 deletions

diff --git a/man/cpt-checksum.1 b/man/cpt-checksum.1
index 4c637eb..bfced46 100644
--- a/man/cpt-checksum.1
+++ b/man/cpt-checksum.1
@@ -5,15 +5,27 @@
 .Nd generate checksums
 .Sh SYNOPSIS
 .Nm
+.Op Fl s
 .Op Ar package...
 .Sh DESCRIPTION
 .Nm
-lints a package, downloads the sources, and creates a checksum file
-including the SHA256 digests of the sources. If no
+lints a package, downloads the sources, and creates a file named
+.Sq checksums
+which includes the
+.Em BLAKE3
+digests of the sources. If no
 .Ar package
 is specified,
 .Nm
 will generate checksums assuming the working directory as the package.
+.Pp
+If the
+.Fl s
+flag is given,
+.Nm
+will generate checksums using the
+.Em SHA256
+algorithm.
 .Sh AUTHOR
 .An Cem Keylan Aq Mt cem@ckyln.com
 .Sh LICENSE
diff --git a/src/cpt-checksum b/src/cpt-checksum
index 619aad2..2de15a8 100755
--- a/src/cpt-checksum
+++ b/src/cpt-checksum
@@ -1,13 +1,14 @@
 #!/bin/sh -ef
 # Generate checksums
 
-if [ -f ./cpt-lib ]; then . ./cpt-lib; else . cpt-lib; fi
+parser_definition() {
+    setup REST help:usage -- "usage: ${0##*/} [-s] [pkg...]"
+    msg         -- '' 'Options:'
+    flag sha -s --    "Generate checksums using the depracated sha256 algorithm"
+    global_options
+}
 
-case "$1" in
-    --help|-h) out "usage: ${0##*/} [pkg...]"; exit 0 ;;
-    --version|-v) version ;;
-    '') set -- "${PWD##*/}"; export CPT_PATH=${PWD%/*}:$CPT_PATH ;;
-esac
+if [ -f ./cpt-lib ]; then . ./cpt-lib; else . cpt-lib; fi
 
 create_cache
 
@@ -21,7 +22,10 @@ for pkg; do
         log "$pkg" "No 'sources' file, skipping checksums"
         continue
     }
-    pkg_checksums "$pkg" | {
+
+    # $sha is defined by the parser.
+    # shellcheck disable=2154
+    pkg_checksums "$pkg" "${sha:+sh256}" | {
 
         if [ -w "$repo_dir" ]; then
             tee "$repo_dir/checksums"