Implement completion for 'dd'.

Closes #267.

1 files changed, 75 insertions, 0 deletions

diff --git a/share/completions/dd.fish b/share/completions/dd.fish
new file mode 100644
index 00000000..cad9ef80
--- /dev/null
+++ b/share/completions/dd.fish
@@ -0,0 +1,75 @@
+complete -c dd -xa '(__fish_complete_dd)'
+complete -c dd -d 'display help and exit' -xa '--help'
+complete -c dd -d 'output version information and exit' -xa '--version'
+
+function __fish_complete_dd --description 'Complete dd operands'
+
+    # set operand_string as a local variable containing the current command-line token.
+    set -l operand_string (commandline -t)
+
+    switch $operand_string
+
+        case 'if=*' 'of=*'
+            # the read command uses $IFS to tokenise stdin input
+            set -l IFS =
+            # $operand now contains the left side of the operator, $value the right
+            echo $operand_string | read -l operand value
+
+            for entry in $value*
+                # if $entry is a directory, append a '/'
+                if test -d $entry
+                    echo $operand"="$entry/
+                else
+                    echo $operand"="$entry
+                end
+            end
+
+        case 'iflag=*' 'oflag=*'
+            set -l flags append direct directory dsync sync fullblock nonblock noatime nocache noctty nofollow
+
+            set -l IFS =
+            echo $operand_string | read -l operand value
+
+            set -l IFS ' '
+            echo $value | sed -e 's/\(.*\)\(,\)/\1 \2/' | read -l complete comma
+
+            # check if there is only one option
+            if test $comma = ''
+                set complete ''
+            else
+                set complete $complete,
+            end
+
+            for flag in $flags
+                echo $operand"="$complete$flag
+            end
+
+        case 'conv=*'
+            set -l convs ascii ebcdic ibm block unblock lcase ucase swab sync excl nocreat notrunc noerror fdatasync fsync
+
+            set -l IFS =
+            echo $operand_string | read -l operand value
+
+            set -l IFS ' '
+            echo $value | sed -e 's/\(.*\)\(,\)/\1 \2/' | read -l complete comma
+
+            if test $comma = ''
+                set complete ''
+            else
+                set complete $complete,
+            end
+
+            for conv in $convs
+                echo $operand"="$complete$conv
+            end
+
+        case 'status=*'
+            echo status=noxfer
+
+        case '*'
+            set -l operands bs cbs conv count ibs if iflag obs of oflag seek skip status
+            for operand in $operands
+                echo $operand=
+            end
+    end
+end