show-utils.sh: stop probing realpath with GNU-only options

src/bin/uudoc.rs

@@ -297,7 +297,7 @@ fn main() -> io::Result<()> {
             )
             .unwrap()
             .trim()
-            .split(' ')
+            .split_ascii_whitespace()
             .map(ToString::to_string)
             .collect();
             map.insert(platform, platform_utils);
@@ -312,7 +312,7 @@ fn main() -> io::Result<()> {
         )
         .unwrap()
         .trim()
-        .split(' ')
+        .split_ascii_whitespace()
         .map(ToString::to_string)
         .collect();
         map.insert("linux", platform_utils);

util/show-utils.sh

@@ -1,35 +1,22 @@
 #!/usr/bin/env bash
 
-# spell-checker:ignore (shell) OSTYPE
-# spell-checker:ignore (utils) cksum coreutils dircolors mkdir mktemp printenv printf readlink realpath grealpath rmdir shuf tsort unexpand
+set -eo pipefail
 # spell-checker:ignore (jq) deps startswith
 
-# Use GNU version for realpath on *BSD
-REALPATH=$(command -v grealpath||command -v realpath)
+cd -- "$(dirname -- "$0")/.."
 
-ME="${0}"
-ME_dir="$(dirname -- "${ME}")"
-ME_parent_dir="$(dirname -- "${ME_dir}")"
-ME_parent_dir_abs="$("${REALPATH}" -mP -- "${ME_parent_dir}" || "${REALPATH}" -- "${ME_parent_dir}")"
-
-# refs: <https://forge.rust-lang.org/release/platform-support.html> , <https://docs.rs/platforms/0.2.1/platforms/platform/tier1/index.html>
-
-# default utility list
-default_utils=$(sed -n '/feat_common_core = \[/,/\]/p' Cargo.toml | sed '1d' |tr -d '],"\n') # $(sed -n '/feat_Tier1 = \[/,/\]/p' Cargo.toml | sed '1d;2d' |tr -d '],"\n') too?
-
-project_main_dir="${ME_parent_dir_abs}"
-# printf 'project_main_dir="%s"\n' "${project_main_dir}"
-cd "${project_main_dir}" &&
-
-    # `jq` available?
-    if ! jq --version 1>/dev/null 2>&1; then
-        echo "WARN: missing \`jq\` (install with \`sudo apt install jq\`); falling back to default (only fully cross-platform) utility list" 1>&2
-        echo "$default_utils"
-    else
+# `jq` available?
+if ! jq --version 1>/dev/null 2>&1; then
+    # refs: <https://forge.rust-lang.org/release/platform-support.html> , <https://docs.rs/platforms/0.2.1/platforms/platform/tier1/index.html>
+    # default utility list
+    default_utils=$(cargo tree --depth 1 --features feat_common_core --format "{lib}" --prefix none | sed -n 's/^uu_//p')
+    echo "WARN: missing \`jq\` (install with \`sudo apt install jq\`); falling back to default (only fully cross-platform) utility list" 1>&2
+    echo "$default_utils"
+else
     # Find 'coreutils' id with regex
     # with cargo v1.76.0, id = "coreutils 0.0.26 (path+file://<coreutils local directory>)"
     # with cargo >= v1.77.0
     # - if local path != '<...>/coreutils' id = "path+file://<coreutils local directory>#coreutils@0.0.26"
     # - if local path == '<...>/coreutils' id = "path+file://<parent directory>/coreutils#0.0.26"
-        cargo metadata "$@" --format-version 1 | jq -r '[.resolve.nodes[] | select(.id|match(".*coreutils[ |@|#]\\d+\\.\\d+\\.\\d+")) | .deps[] | select(.pkg|match("uu_")) | .name | sub("^uu_"; "")] | sort | join(" ")'
-    fi
+    cargo metadata "$@" --format-version 1 | jq -r '[.resolve.nodes[] | select(.id|match(".*coreutils[ |@|#]\\d+\\.\\d+\\.\\d+")) | .deps[] | select(.pkg|match("uu_")) | .name | sub("^uu_"; "")] | sort | join(" ")'
+fi