Correctly escape backslashes (#177)

Fixes #131

navi

@@ -4,7 +4,7 @@ set -euo pipefail
 export NAVI_HOME="$(cd "$(dirname "$0")" && pwd)"
 source "${NAVI_HOME}/src/main.sh"
 
-VERSION="0.18.0"
+VERSION="0.18.1"
 NAVI_ENV="${NAVI_ENV:-prod}"
 
 opts::eval "$@"

src/arg.sh

@@ -67,6 +67,8 @@ arg::serialize_code() {
    printf "tr \"'\" '${ESCAPE_CHAR_2}'"
    printf " | "
    printf "tr '\"' '${ESCAPE_CHAR_3}'"
+   printf " | "
+   printf "tr '\\\\' '${ESCAPE_CHAR_4}'"
 }
 
 arg::pick() {

src/cmd.sh

@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 
 cmd::escape() {
-   tr '\\' "$ESCAPE_CHAR_3"
+   tr '\\' "$ESCAPE_CHAR_4"
 }
 
 cmd::unescape() {
-   tr "$ESCAPE_CHAR_3" '\\'
+   tr "$ESCAPE_CHAR_4" '\\'
 }
 
 cmd::loop() {
@@ -50,4 +50,4 @@ cmd::finish() {
    else
       eval "$cmd"
    fi
-}
+}

src/selection.sh

@@ -15,7 +15,7 @@ selection_str::comment() {
 }
 
 selection_str::snippet() {
-   echo "$*" | awk -F "${SELECTION_ESCAPE_STR}" '{print $2}' | selection_str::without_ellipsis
+   echo "$*" | awk -F "${SELECTION_ESCAPE_STR}" '{print $2}' | selection_str::without_ellipsis | cmd::escape
 }
 
 selection_str::tags() {
@@ -72,4 +72,4 @@ selection::tags() {
 selection::key() {
    local -r selection="$1"
    dict::get "$selection" key
-}
+}

src/str.sh

@@ -3,6 +3,7 @@
 ESCAPE_CHAR="\034"
 ESCAPE_CHAR_2="\035"
 ESCAPE_CHAR_3="\036"
+ESCAPE_CHAR_4="\037"
 
 str::length() {
    awk '{print length}'
@@ -82,4 +83,4 @@ str::as_column() {
 
 str::with_line_numbers() {
    awk '{printf("%d %s\n", NR,$0)}'
-}
+}

src/ui.sh

@@ -23,7 +23,7 @@ ui::select() {
    [[ "${SHELL:-}" =~ 'fish' ]] || local -r sub='$'
 
    local -r script_path="${NAVI_HOME}/navi"
-   local -r preview_cmd="\"${script_path}\" preview ${sub:-}(echo \'{}\' | $(arg::serialize_code))"
+   local -r preview_cmd="\"${script_path}\" preview ${sub:-}(echo \'{}\' | $(arg::serialize_code) 2> /dev/null)"
 
    local -r query="$(dict::get "$OPTIONS" query)"
    local -r entry_point="$(dict::get "$OPTIONS" entry_point)"