Add support for multiple choice (#175)v0.18.0

Fixes #173

3 files changed, 52 insertions, 10 deletions

diff --git a/README.md b/README.md
index 466627c..7954df7 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,9 @@ Table of contents
    * [Cheatsheet syntax](#cheatsheet-syntax)
       * [Syntax overview](#syntax-overview)
       * [Variables](#variables)
-      * [Table formatting](#table-formatting)
+      * [Variable options](#variable-options)
+         * [Table formatting](#table-formatting)
+         * [Multiple choice](#multiple-choice)
    * [List customization](#list-customization)
    * [Related projects](#related-projects)
    * [Etymology](#etymology)
@@ -233,9 +235,13 @@ $ x: echo -e '1\n2\n3'
 $ y: echo -e "$((x+10))\n$((x+20))"
 ```
 
-### Table formatting
+### Variable options
 
-You can pick a specific column of a selection and set the number of lines considered as headers:
+For lines starting with `$` you can add extra options using `---`.
+
+#### Table formatting
+
+You can pick a specific column of a selection and set the number of lines considered as headers via `--column` and `--headers`:
 
 ```sh
 # This will pick the 3rd column and use the first line as header
@@ -244,6 +250,17 @@ docker rmi <image_id>
 $ image_id: docker images --- --column 3 --headers 1
 ```
 
+#### Multiple choice
+
+You can select multiple values via `--multi` and hitting `<TAB>`:
+
+```sh
+# The resulting command will be something like: cat "a.txt" "b.txt"
+cat <files>
+
+$ files: ls --- --multi true
+```
+
 List customization
 ------------------
 
diff --git a/navi b/navi
index f935fc7..16da67f 100755
--- a/navi
+++ b/navi
@@ -4,7 +4,7 @@ set -euo pipefail
 export NAVI_HOME="$(cd "$(dirname "$0")" && pwd)"
 source "${NAVI_HOME}/src/main.sh"
 
-VERSION="0.17.1"
+VERSION="0.18.0"
 NAVI_ENV="${NAVI_ENV:-prod}"
 
 opts::eval "$@"
diff --git a/src/arg.sh b/src/arg.sh
index 4707721..6fd2afc 100644
--- a/src/arg.sh
+++ b/src/arg.sh
@@ -19,14 +19,28 @@ arg::escape() {
 
 arg::interpolate() {
    local -r arg="$1"
-   local -r value="$2"
+   local -r value="$(echo "$2" | tr "$ESCAPE_CHAR_3" '\n')"
 
-   local -r words="$(echo "$value" | wc -w | xargs)"
+   local -r lines="$(echo "$value" | wc -l)"
+
+   if [ $lines -lt 2 ]; then
+
+      local -r words="$(echo "$value" | wc -w | xargs)"
+
+      if [[ $words > 1 ]]; then
+         sed "s|<${arg}>|\"${value}\"|g"
+      else
+         sed "s|<${arg}>|${value}|g"
+      fi
 
-   if [[ $words > 1 ]]; then
-      sed "s|<${arg}>|\"${value}\"|g"
    else
-      sed "s|<${arg}>|${value}|g"
+
+      local -r newvalue="$(echo "$value" \
+         | xargs -I% echo '"%"' \
+         | tr '\n' ' ')"
+
+      sed "s|<${arg}>|${newvalue}|g"
+
    fi
 }
 
@@ -78,8 +92,19 @@ arg::pick() {
 
    if [ -n "$fn" ]; then
       local suggestions="$(eval "$fn" 2>/dev/null)"
+
+      local args
+      args+=("--prompt"); args+=("${arg}: ")
+      args+=("--header-lines"); args+=("${headers:-0}")
+      if ${multi:-false}; then
+         args+=("-m")
+      fi
+
       if [ -n "$suggestions" ]; then
-         echo "$suggestions" | ui::fzf --prompt "$arg: " --header-lines "${headers:-0}" | str::column "${column:-}" "${separator:-}"
+         echo "$suggestions" \
+            | ui::fzf ${args[@]:-} \
+            | str::column "${column:-}" "${separator:-}" \
+            | tr '\n' "$ESCAPE_CHAR_3"
       fi
    elif ${NAVI_USE_FZF_ALL_INPUTS:-false}; then
       echo "" | ui::fzf --prompt "$arg: " --print-query --no-select-1 --height 1