Enable autocomplete for bash (#184)

README.md

@@ -41,6 +41,13 @@ Bare zip archives per release version are available on https://releases.manifold
 For instructions on Windows, [click here](./.github/WINDOWS.md).
 
 
+## Autocomplete
+
+If you have bash and bash-completion installed, you can enable autocomplete with:
+```
+curl -o- https://raw.githubusercontent.com/manifoldco/manifold-cli/master/autocomplete.sh | sh
+```
+
 ## Quickstart
 
 First you must create an account.

autocomplete.sh

@@ -0,0 +1,143 @@
+#!/bin/sh
+
+{ # this ensures the entire script is downloaded #
+
+  is_installed() {
+    type "$1" > /dev/null 2>&1
+  }
+
+  error_exit() {
+    if is_installed tput; then
+      tput sgr0
+      tput setaf 1
+      echo "ERROR: $1"
+      tput sgr0
+    else
+      echo "ERROR: $1"
+    fi
+    exit 1
+  }
+
+  success_msg() {
+    if is_installed tput; then
+      command printf "["
+      tput sgr0
+      tput setaf 2
+      command printf "OK"
+      tput sgr0
+      command printf "] ${1}\\n"
+    else
+      echo "[OK]: $1"
+    fi
+  }
+
+  warning_msg() {
+    if is_installed tput; then
+      command printf "["
+      tput sgr0
+      tput setaf 3
+      command printf "!!"
+      tput sgr0
+      command printf "] ${1}\\n"
+    else
+      echo "[!!]: $1"
+    fi
+  }
+
+  try_profile() {
+    if [ -z "${1-}" ] || [ ! -f "${1}" ]; then
+      return 1
+    fi
+    echo "${1}"
+  }
+
+  #
+  # Detect profile file if not specified as environment variable
+  # (eg: PROFILE=~/.myprofile)
+  # The echo'ed path is guaranteed to be an existing file
+  # Otherwise, an empty string is returned
+  #
+  detect_profile() {
+    if [ -n "${PROFILE}" ] && [ -f "${PROFILE}" ]; then
+      echo "${PROFILE}"
+      return
+    fi
+
+    local DETECTED_PROFILE
+    DETECTED_PROFILE=''
+    local SHELLTYPE
+    SHELLTYPE="$(basename "/$SHELL")"
+
+    if [ "$SHELLTYPE" = "bash" ]; then
+      if [ -f "$HOME/.bashrc" ]; then
+        DETECTED_PROFILE="$HOME/.bashrc"
+      elif [ -f "$HOME/.bash_profile" ]; then
+        DETECTED_PROFILE="$HOME/.bash_profile"
+      fi
+    elif [ "$SHELLTYPE" = "zsh" ]; then
+      DETECTED_PROFILE="$HOME/.zshrc"
+    fi
+
+    if [ -z "$DETECTED_PROFILE" ]; then
+      for EACH_PROFILE in ".profile" ".bashrc" ".bash_profile" ".zshrc"
+      do
+        if DETECTED_PROFILE="$(try_profile "${HOME}/${EACH_PROFILE}")"; then
+          break
+        fi
+      done
+    fi
+
+    if [ ! -z "$DETECTED_PROFILE" ]; then
+      echo "$DETECTED_PROFILE"
+    fi
+  }
+
+  autocomplete() {
+    local DETECTED_PROFILE
+    AUTOCOMPLETE=''
+
+    local SHELLTYPE
+    SHELLTYPE="$(basename "/$SHELL")"
+
+    if [ "$SHELLTYPE" = "bash" ]; then
+      AUTOCOMPLETE=$(cat <<'EOF'
+#! /bin/bash
+export MANIFOLD_AUTOCOMPLETE=true
+_manifold_bash_autocomplete() {
+  local cur opts base
+  COMPREPLY=()
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash-completion )
+  COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+  return 0
+}
+complete -F _manifold_bash_autocomplete manifold
+EOF
+)
+    fi
+
+    if [ ! -z "$AUTOCOMPLETE" ]; then
+      echo "$AUTOCOMPLETE"
+    fi
+  }
+
+  PROFILE=`detect_profile`
+  AUTOCOMPLETE=`autocomplete`
+
+  if [ -z "$MANIFOLD_DIR" ]; then
+    MANIFOLD_DIR="${HOME}/.manifold/bin"
+  fi
+
+  mkdir -p $MANIFOLD_DIR
+
+  if [ "$PROFILE" = "" ]; then
+    error_exit "Unable to locate profile settings file (something like $HOME/.bashrc or $HOME/.bash_profile)"
+  elif [ "$MANIFOLD_AUTOCOMPLETE" = "" ]; then
+    echo "$AUTOCOMPLETE" > "$MANIFOLD_DIR/.manifold_completion"
+    echo "source $MANIFOLD_DIR/.manifold_completion" >> $PROFILE
+
+    success_msg "Your $PROFILE has changed to manifold autocomplete"
+    warning_msg "Please restart or re-source your terminal session."
+  fi
+
+}

cmd/main.go

@@ -28,6 +28,7 @@ func main() {
 	app.Version = config.Version
 	app.Commands = append(cmds, helpCommand)
 	app.Flags = append(app.Flags, cli.HelpFlag)
+	app.EnableBashCompletion = true
 
 	app.Action = func(cliCtx *cli.Context) error {
 		// Show help if no arguments passed

install.sh

@@ -143,8 +143,6 @@
 
   rm $FILENAME
 
-  cd $CURRENT_DIR
-
   if is_installed manifold; then
     PREVIOUS_INSTALLATION=`which manifold`
     if [ "$PREVIOUS_INSTALLATION" = "$MANIFOLD_DIR/manifold" ]; then
@@ -175,6 +173,8 @@
     warning_msg "Please restart or re-source your terminal session."
   fi
 
+  cd $CURRENT_DIR
+
   echo
   success_msg "All done. Happy manifold use! :)"
 }