✨ Add long-form option parsing

So far we could only add single-letter (POSIX) options: `-e`, `-n` and
so forth. Since we will run out of alphabet at some point, this commit
introduces parsing of multi-letter long-form (gnu) options (plus any
modern application should really support it anyways):
`--echo`, `--noline`.

Additionally, we support supplying long-form options that supply a value
both in the spaced (`--hist-limit 0`) and the equals (`--hist-limit=0`)
forms. Short, long, spaced, equals can be mixed and matched between
freely.

Lastly, we retain the ability to concatenate short options as before
(`-ne` is valid, as is `-P0` for the respective options above).

This should cover all bases and does not complicate the code too much to
keep a coherent overview.

Changed several code samples in the documentation to make
use of short- or long-form options to point out
possibility.

CHANGELOG.md

@@ -14,6 +14,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   This replaces previous `-P` history flag toggle. Use number to set amount of recent
   entries to display, `-P3`. To completely hide history use `-P0`.
 - Add nerdfont emoji set download with `-D nerd`
+- Add parsing for long-form options (`--private` instead of `-p` and so on):
+  Options requiring a value can be given both in space-separated (`--hist-limit 2`)
+  and equals-separated (`--hist-limit=2`) versions. POSIX option concatenation still
+  works (`-ne` to echo without newline).
 
 ### Changed
 

README.md

@@ -118,7 +118,7 @@ By default, bemoji will sort the list it displays by your most frequently and mo
 To disable this behavior, execute bemoji like the following:
 
 ```bash
-bemoji -P 0
+bemoji --hist-limit 0
 ```
 
 This will stop bemoji from adding recently used emoji before displaying the list.
@@ -126,11 +126,12 @@ This will stop bemoji from adding recently used emoji before displaying the list
 You can also stop bemoji from adding any emoji to your history in the first place:
 
 ```bash
-bemoji -p
+bemoji --private
 ```
 
 This will not add any of the emoji you pick to your recent emojis.
-Put both together to completely ignore the recent emoji feature of the program:
+Put both together to completely ignore the recent emoji feature of the program
+(these are the equivalent short versions of the options above):
 
 ```bash
 bemoji -p -P0
@@ -142,7 +143,7 @@ To limit the number of your recently used emoji that are shown without hiding th
 For example, to display only the top 4 recently used emoji:
 
 ```bash
-bemoji -P 4
+bemoji --hist-limit 4
 ```
 
 The recent list will also contain emoji that are *not* usually on your lists,
@@ -171,7 +172,7 @@ There are no equivalent commandline arguments to overwrite these two settings.
 A custom emoji list can be supplied as commandline argument `-f` or `BEMOJI_CUSTOM_LIST` environment variable.
 
 ```bash
-bemoji -f path/to/my/list.txt
+bemoji --file path/to/my/list.txt
 ```
 
 The list will override the normally presented emoji,
@@ -191,7 +192,7 @@ By default, it only downloads emoji, though you can have it download math symbol
 To download additional sets, execute bemoji like the following:
 
 ```bash
-bemoji -D all
+bemoji --download all
 ```
 
 This will download *all* default sets bemoji knows - which is currently the default emoji list, nerd font icons, and a long list of math symbols.
@@ -201,7 +202,7 @@ Other valid options for this setting are `emoji`, `math`, `nerd`, `none`.
 bemoji -D "math emoji nerd"
 ```
 
-The above command is equivalent to `all` as you can mention multiple sets you want downloaded.
+The above command is equivalent to the previous `all` as you can mention multiple sets you want downloaded.
 
 If set to `none` and no files are in the emoji directory,
 bemoji will complain and not show anything.
@@ -244,7 +245,7 @@ You can execute bemoji with the `-e` flag with which you tell it not to do anyth
 This can be very useful for creating your own little script with it:
 
 ```bash
-bemoji -e | cat <(echo -n "https://emojipedia.org/") - | xargs xdg-open
+bemoji --echo | cat <(echo -n "https://emojipedia.org/") - | xargs xdg-open
 ```
 
 This snippet will open a wiki page for the picked emoji in your browser.

bemoji

@@ -28,19 +28,19 @@ usage() {
 	echo "Invoked without arguments sends the picked emoji to the clipboard."
 	echo
 	echo " Command options (can be combined):"
-    echo "   -t             Simulate typing the emoji choice with the keyboard."
-    echo "   -c             Send emoji choice to the clipboard. (default)"
-    echo "   -e             Only echo out the picked emoji."
+	echo "  -t, --type                 Simulate typing the emoji choice with the keyboard."
+	echo "  -c, --clip                 Send emoji choice to the clipboard. (default)"
+	echo "  -e, --echo                 Only echo out the picked emoji."
 	echo ""
 	echo " Other options:"
-    echo "   -n             Do not print a newline after the picked emoji."
-    echo "   -p             Do not save picked emoji to recent history."
-    echo "   -P <number>    Limit number of recent emoji to display."
-    echo "   -D <choice>    Choose from default lists to download."
+	echo "  -n, --noline               Do not print a newline after the picked emoji."
+	echo "  -p, --private              Do not save picked emoji to recent history."
+	echo "  -P, --hist-limit <number>  Limit number of recent emoji to display."
+	echo "  -D, --download <choice>    Choose from default lists to download."
 	echo "                             Valid choices: all|none|emoji|math|nerd (multiple choices possible)."
-    echo "   -f <filepath>  Use a custom emoji database. Can be a url which will be retrieved."
-    echo "   -v             Display current program version and directory configuration."
-    echo "   -h             Show this help."
+	echo "  -f, --file <filepath>      Use a custom emoji database. Can be a url which will be retrieved."
+	echo "  -v, --version              Display current program version and directory configuration."
+	echo "  -h, --help                 Show this help."
 	echo
 	exit "$1"
 }
@@ -50,22 +50,67 @@ version() {
     exit
 }
 
-# Get Options
-while getopts ":f:D:tcenpP:hv" o; do
-    case "${o}" in
-    f) BEMOJI_CUSTOM_LIST="${OPTARG}" ;;
-    t) bm_cmds+=(_typer) ;;
+parse_cli() {
+	while getopts cD:ef:hnpP:tv-: arg "$@"; do
+		case "$arg" in
 		c) bm_cmds+=(_clipper) ;;
+		D) _opt_set_download_list "${OPTARG}" ;;
 		e) bm_cmds+=(cat) ;;
-    n) bm_echo_newline=false ;;
-    D) BEMOJI_DOWNLOAD_LIST="${OPTARG}" ;;
-    p) bm_private_mode=true ;;
-    P) bm_limit_recent="${OPTARG}" ;;
+		f) _opt_set_custom_list "${OPTARG}" ;;
 		h) usage 0 ;;
+		n) bm_echo_newline=false ;;
+		p) bm_private_mode=true ;;
+		P) _opt_set_hist_limit "${OPTARG}" ;;
+		t) bm_cmds+=(_typer) ;;
 		v) version ;;
-    *) usage 1 ;;
+		-)
+			LONG_OPTARG="${OPTARG#*=}"
+			case "$OPTARG" in
+			clip) bm_cmds+=(_clipper) ;;
+			download=?*) _opt_set_download_list "${LONG_OPTARG}" ;;
+			download*)
+				_opt_set_download_list "${*:$OPTIND:1}"
+				OPTIND=$((OPTIND + 1))
+				;;
+			echo) bm_cmds+=(cat) ;;
+			file=?*) _opt_set_custom_list "${LONG_OPTARG}" ;;
+			file*)
+				_opt_set_custom_list "${*:$OPTIND:1}"
+				OPTIND=$((OPTIND + 1))
+				;;
+			help) usage 0 ;;
+			noline) bm_echo_newline=false ;;
+			private) bm_private_mode=true ;;
+			hist-limit=?*) _opt_set_hist_limit "${LONG_OPTARG}" ;;
+			hist-limit*)
+				_opt_set_hist_limit "${*:$OPTIND:1}"
+				OPTIND=$((OPTIND + 1))
+				;;
+			type) bm_cmds+=(_typer) ;;
+			version) version ;;
+			'') break ;;
+			*)
+				echo "Unknown option: ${OPTARG}" 1>&2
+				usage 1
+				;;
+			esac
+			;;
+		\?) exit 2 ;;
 		esac
 	done
+	shift $((OPTIND - 1))
+	OPTIND=1
+}
+
+_opt_set_custom_list() {
+	BEMOJI_CUSTOM_LIST="$1"
+}
+_opt_set_download_list() {
+	BEMOJI_DOWNLOAD_LIST="$1"
+}
+_opt_set_hist_limit() {
+	bm_limit_recent="$1"
+}
 
 prepare_db() {
     # Create list directory
@@ -220,6 +265,8 @@ _picker() {
     fi
 }
 
+parse_cli "$@"
+
 [ -n "$BEMOJI_CUSTOM_LIST" ] || prepare_db
 result=$(gather_emojis | _picker)
 exit_value="$?"

test/bemoji_cmds.bats

@@ -85,3 +85,29 @@ typing result"
     BEMOJI_PICKER_CMD="echo heart" run --keep-empty-lines -- bemoji -ne
     assert_output --regexp '^heart$'
 }
+
+@test "Understands long-form options" {
+    run bemoji --help
+    assert_success
+    assert_output --partial "A simple emoji picker."
+}
+
+@test "Understands long-form equals values" {
+    BEMOJI_CLIP_CMD="echo heart" run bemoji --hist-limit=0
+    assert_success
+}
+
+@test "Understands long-form spaced values" {
+    BEMOJI_CLIP_CMD="echo heart" run bemoji --hist-limit 0
+    assert_success
+}
+
+@test "Understands short-form spaced values" {
+    BEMOJI_CLIP_CMD="echo heart" run bemoji -P 0
+    assert_success
+}
+
+@test "Can concatenate short-form options and values" {
+    BEMOJI_CLIP_CMD="echo heart" run bemoji -neP0
+    assert_success
+}