[CLI] Tab completion support (#67)

* Add support for bash, zsh and fish tab completion

Author: destefy

README.md

@@ -22,6 +22,13 @@ Once installed, use the centml CLI tool with the following command:
 centml 
 ```
 
+If you want tab completion, run
+```bash
+source scripts/completions/completion.<shell language>
+```
+Shell language can be: bash, zsh, fish
+(Hint: add `source /path/to/completions/completion.<shell language>` to your `~/.bashrc`, `~/.zshrc` or `~/.config/fish/completions/centml.fish`)
+
 ### Compilation
 
 centml-python-client's compiler feature allows you to compile your ML model remotely using the [hidet](https://hidet.org/docs/stable/index.html) backend. \

scripts/completions/completion.bash

@@ -0,0 +1,29 @@
+_centml_completion() {
+    local IFS=$'\n'
+    local response
+
+    response=$(env COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD _CENTML_COMPLETE=bash_complete $1)
+
+    for completion in $response; do
+        IFS=',' read type value <<< "$completion"
+
+        if [[ $type == 'dir' ]]; then
+            COMPREPLY=()
+            compopt -o dirnames
+        elif [[ $type == 'file' ]]; then
+            COMPREPLY=()
+            compopt -o default
+        elif [[ $type == 'plain' ]]; then
+            COMPREPLY+=($value)
+        fi
+    done
+
+    return 0
+}
+
+_centml_completion_setup() {
+    complete -o nosort -F _centml_completion centml
+}
+
+_centml_completion_setup;
+

scripts/completions/completion.fish

@@ -0,0 +1,18 @@
+function _centml_completion;
+    set -l response (env _CENTML_COMPLETE=fish_complete COMP_WORDS=(commandline -cp) COMP_CWORD=(commandline -t) centml);
+
+    for completion in $response;
+        set -l metadata (string split "," $completion);
+
+        if test $metadata[1] = "dir";
+            __fish_complete_directories $metadata[2];
+        else if test $metadata[1] = "file";
+            __fish_complete_path $metadata[2];
+        else if test $metadata[1] = "plain";
+            echo $metadata[2];
+        end;
+    end;
+end;
+
+complete --no-files --command centml --arguments "(_centml_completion)";
+

scripts/completions/completion.zsh

@@ -0,0 +1,41 @@
+#compdef centml
+
+_centml_completion() {
+    local -a completions
+    local -a completions_with_descriptions
+    local -a response
+    (( ! $+commands[centml] )) && return 1
+
+    response=("${(@f)$(env COMP_WORDS="${words[*]}" COMP_CWORD=$((CURRENT-1)) _CENTML_COMPLETE=zsh_complete centml)}")
+
+    for type key descr in ${response}; do
+        if [[ "$type" == "plain" ]]; then
+            if [[ "$descr" == "_" ]]; then
+                completions+=("$key")
+            else
+                completions_with_descriptions+=("$key":"$descr")
+            fi
+        elif [[ "$type" == "dir" ]]; then
+            _path_files -/
+        elif [[ "$type" == "file" ]]; then
+            _path_files -f
+        fi
+    done
+
+    if [ -n "$completions_with_descriptions" ]; then
+        _describe -V unsorted completions_with_descriptions -U
+    fi
+
+    if [ -n "$completions" ]; then
+        compadd -U -V unsorted -a completions
+    fi
+}
+
+if [[ $zsh_eval_context[-1] == loadautofunc ]]; then
+    # autoload from fpath, call function directly
+    _centml_completion "$@"
+else
+    # eval/source/. command, register function for later
+    compdef _centml_completion centml
+fi
+