bash completion script for eclair-cli (#443)

contrib/eclair-cli.bash-completion

@@ -0,0 +1,39 @@
+# bash completion for eclair-cli
+# copy to /etc/bash_completion.d/
+# created by Stadicus
+
+_eclair-cli()
+{
+    local cur prev opts cmds
+
+    # eclair-cli might not be in $PATH
+    local eclaircli
+    ecli="$1"
+
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    case "$cur" in
+        -*=*)
+            return 0
+            ;;
+        *)
+            # works fine, but is too slow at the moment.
+            # allopts=$($eclaircli help 2>&1 | awk '$1 ~ /^"/ { sub(/,/, ""); print $1}' | sed 's/[":]//g')
+            allopts="connect open peers channels channel allnodes allchannels allupdates receive send close checkpayment getinfo help"
+
+            if ! [[ " $allopts " =~ " $prev " ]]; then          # prevent double arguments
+                if [[ -z "$cur" || "$cur" =~ ^[a-z] ]]; then
+                    opts=${allopts}
+                fi
+            fi
+
+            if [[ -z "$cur" || "$cur" =~ ^- ]]; then
+               cmds=$($ecli 2>&1 | awk '$1 ~ /^-/ { sub(/,/, ""); print $1}')
+            fi
+
+            COMPREPLY=( $(compgen -W "${cmds} ${opts}" -- ${cur}) )
+    esac
+}
+complete -F _eclair-cli eclair-cli