Add nnn

dot_config/nnn/plugins/executable_chksum

@@ -0,0 +1,75 @@
+#!/usr/bin/env sh
+
+# Description: Create and verify checksums
+#
+# Note:  On macOS, install the relevant checksum packages from Homebrew with:
+#            brew install coreutils
+#
+# Details:
+#   - selection: it will generate one file with the checksums and filenames
+#                (and with paths if they are in another directory)
+#                output checksum filename format: checksum_timestamp.checksum_type
+#   - file: if the file is a checksum, the plugin does the verification
+#           if the file is not a checksum, checksum will be generated for it
+#           the output checksum filename will be filename.checksum_type
+#   - directory: recursively calculates checksum for all the files in the dir
+#                the output checksum filename will be directory.checksum_type
+#
+# Shell: POSIX compliant
+# Authors: ath3, Arun Prakash Jana
+
+selection=${NNN_SEL:-${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection}
+resp=f
+chsum=md5
+
+checksum_type()
+{
+    echo "possible checksums: md5, sha1, sha224, sha256, sha384, sha512"
+    printf "create md5 (m), sha256 (s), sha512 (S) (or type one of the above checksums) [default=m]: "
+    read -r chsum_resp
+    for chks in md5 sha1 sha224 sha256 sha384 sha512
+    do
+        if [ "$chsum_resp" = "$chks" ]; then
+            chsum=$chsum_resp
+            return
+        fi
+    done
+    if [ "$chsum_resp" = "s" ]; then
+        chsum=sha256
+    elif [ "$chsum_resp" = "S" ]; then
+        chsum=sha512
+    fi
+}
+
+if [ -s "$selection" ]; then
+    printf "work with selection (s) or current file (f) [default=f]: "
+    read -r resp
+fi
+
+if [ "$resp" = "s" ]; then
+    checksum_type
+    sed 's|'"$PWD/"'||g' < "$selection" | xargs -0 -I{} ${chsum}sum {} > "checksum_$(date '+%Y%m%d%H%M').$chsum"
+
+    # Clear selection
+    if [ -p "$NNN_PIPE" ]; then
+        printf "-" > "$NNN_PIPE"
+    fi
+elif [ -n "$1" ]; then
+    if [ -f "$1" ]; then
+        for chks in md5 sha1 sha224 sha256 sha384 sha512
+        do
+            if echo "$1" | grep -q \.${chks}$; then
+                ${chks}sum -c < "$1"
+                read -r _
+                exit
+            fi
+        done
+        checksum_type
+        file=$(basename "$1").$chsum
+        ${chsum}sum "$1" > "$file"
+    elif [ -d "$1" ]; then
+        checksum_type
+        file=$(basename "$1").$chsum
+        find "$1" -type f -exec ${chsum}sum "{}" + > "$file"
+    fi
+fi