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-rwxr-xr-xbin/cht.sh389
1 files changed, 389 insertions, 0 deletions
diff --git a/bin/cht.sh b/bin/cht.sh
new file mode 100755
index 0000000..b7a6117
--- /dev/null
+++ b/bin/cht.sh
@@ -0,0 +1,389 @@
+#!/usr/bin/env bash
+#
+# [X] open section
+# [X] one shot mode
+# [X] usage info
+# [X] dependencies check
+# [X] help
+# [X] yank/y/copy/c
+# [X] Y/C
+# [X] eof problem
+# [X] less
+# [X] stealth mode
+#
+# here are several examples for the stealth mode:
+#
+# zip lists
+# list permutation
+# random list element
+# reverse a list
+# read json from file
+# append string to a file
+# run process in background
+# count words in text counter
+# group elements list
+
+__CHTSH_VERSION=4
+__CHTSH_DATETIME="2018-07-08 22:26:46 +0200"
+
+export LESSSECURE=1
+STEALTH_MAX_SELECTION_LENGTH=5
+
+case "$OSTYPE" in
+ darwin*) is_macos=yes ;;
+ *) is_macos=no ;;
+esac
+
+get_query_options()
+{
+ local query="$*"
+ if [ -n "$CHTSH_QUERY_OPTIONS" ]; then
+ if [[ $query == *\?* ]]; then
+ query="$query&${CHTSH_QUERY_OPTIONS}"
+ else
+ query="$query?${CHTSH_QUERY_OPTIONS}"
+ fi
+ fi
+ echo "$query"
+}
+
+do_query()
+{
+ local query="$*"
+ local b_opts=()
+
+ if [ -e "$HOME/.cht.sh/id" ]; then
+ b_opts=(-b "$HOME/.cht.sh/id")
+ fi
+
+ curl -q "${b_opts[@]}" -s https://cht.sh/"$(get_query_options $query)" > "$TMP1"
+
+ if [ -z "$lines" ] || [ "$(wc -l "$TMP1" | awk '{print $1}')" -lt "$lines" ]; then
+ cat "$TMP1"
+ else
+ less -R "$TMP1"
+ fi
+}
+
+prepare_query()
+{
+ local section="$1"; shift
+ local input="$1"; shift
+ local arguments="$1"; shift
+
+ local query
+ if [ -z "$section" ] || [[ "$input" = /* ]]; then
+ query=$(echo "$input" | sed 's@ @/@; s@ @+@g')
+ else
+ query=$(echo "$section/$input" | sed 's@ @+@g')
+ fi
+
+ [ -n "$arguments" ] && arguments="?$arguments"
+ echo "$query$arguments"
+}
+
+get_list_of_sections()
+{
+ curl -q -s https://cht.sh/:list | grep -v '/.*/' | grep '/$'
+}
+
+if [ -e "$HOME"/.cht.sh/cht.sh.conf ]; then
+ # shellcheck disable=SC1090,SC2002
+ source <( cat "$HOME"/.cht.sh/cht.sh.conf | sed 's/#.*//' | grep -xv '' | sed s/^/CHTSH_/ ) >& /dev/null
+fi
+
+if [ "$1" == --read ]; then
+ read -r a || a=exit
+ echo $a
+ exit 0
+elif [ "$1" == --help ] || [ -z "$1" ]; then
+ cat <<EOF
+Usage:
+
+ ${0##*/} --help show this help
+ ${0##*/} --shell [LANG] shell mode (open LANG if specified)
+ ${0##*/} QUERY process QUERY and exit
+EOF
+ exit 0
+elif [ "$1" == --shell ]; then
+ shell_mode=yes
+ shift
+fi
+
+prompt="cht.sh"
+
+prompt="cht.sh"
+opts=""
+input=""
+for o; do
+ if [[ "$o" == -* ]]; then
+ opts="${opts}${o#-}"
+ else
+ input="$input $o"
+ fi
+done
+query=$(echo "$input" | sed 's@ *$@@; s@^ *@@; s@ @/@; s@ @+@g')
+
+if [ "$shell_mode" != yes ]; then
+ curl -q -s https://cht.sh/"$(get_query_options "$query")"
+ exit 0
+else
+ new_section="$1"
+ valid_sections=($(get_list_of_sections))
+ valid=no; for q in "${valid_sections[@]}"; do [[ "$q" == $new_section/ ]] && { valid=yes; break; }; done
+
+ if [[ $valid = yes ]]; then
+ section="$new_section"
+ this_query="$(echo "$input" | sed 's@ *[^ ]* *@@')"
+ this_prompt="\033[0;32mcht.sh/$section>\033[0m "
+ else
+ this_query="$input"
+ this_prompt="\033[0;32mcht.sh>\033[0m "
+ fi
+ if [ -n "$this_query" ] && [ -z "$CHEATSH_RESTART" ]; then
+ printf "$this_prompt$this_query\n"
+ curl -q -s https://cht.sh/"$(get_query_options "$query")"
+ fi
+fi
+
+if [ "$is_macos" != yes ]; then
+ which xsel >& /dev/null || { echo 'DEPENDENCY: please install "xsel" for "copy"' >&2; }
+fi
+which rlwrap >& /dev/null || { echo 'DEPENDENCY: install "rlwrap" to use cht.sh in the shell mode' >&2; exit 1; }
+which curl >& /dev/null || { echo 'DEPENDENCY: install "curl" to use cht.sh' >&2; exit 1; }
+
+mkdir -p "$HOME/.cht.sh/"
+lines=$(tput lines)
+
+TMP1=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
+trap 'rm -f $TMP1 $TMP2' EXIT
+trap 'true' INT
+
+if ! [ -e "$HOME/.cht.sh/.hushlogin" ] && [ -z "$this_query" ]; then
+ echo "type 'help' for the cht.sh shell help"
+fi
+
+while true; do
+ if [ "$section" != "" ]; then
+ full_prompt="$prompt/$section> "
+ else
+ full_prompt="$prompt> "
+ fi
+
+ input=$(
+ rlwrap -H $HOME/.cht.sh/history -pgreen -C cht.sh -S "$full_prompt" bash "$0" --read | sed 's/ *#.*//'
+ )
+
+ case "$input" in
+ '?'|h|help)
+ cat <<EOF
+help - show this help
+hush - do not show the 'help' string at start anymore
+cd LANG - change the language context
+copy - copy the last answer in the clipboard (aliases: yank, y, c)
+ccopy - copy the last answer w/o comments (cut comments; aliases: cc, Y, C)
+exit - exit the cheat shell (aliases: quit, ^D)
+id [ID] - set/show an unique session id ("reset" to reset, "remove" to remove)
+stealth - stealth mode (automatic queries for selected text)
+update - self update (only if the scriptfile is writeable)
+version - show current cht.sh version
+/:help - service help
+QUERY - space ceparated query staring (examples are below)
+ cht.sh> python zip list
+ cht.sh/python> zip list
+ cht.sh/go> /python zip list
+EOF
+ continue
+ ;;
+ hush)
+ mkdir -p $HOME/.cht.sh/ && touch $HOME/.cht.sh/.hushlogin && echo "Initial 'use help' message was disabled"
+ continue
+ ;;
+ cd)
+ section=""
+ continue
+ ;;
+ "cd "*)
+ new_section=$(echo "$input" | sed 's/cd //; s/ .*//; s@/\+$@@; s@^/\+@@')
+ if [ "$new_section" = "" ] || [ "$new_section" = ".." ] || [ "$new_section" = / ]; then
+ section=""
+ else
+ valid_sections=($(get_list_of_sections))
+ valid=no; for q in "${valid_sections[@]}"; do [[ "$q" == $new_section/ ]] && { valid=yes; break; }; done
+ if [ "$valid" = no ]; then
+ echo "Invalid section: $new_section"
+ echo "Valid sections:"
+ echo "${valid_sections[@]}" | xargs printf "%-10s\n" | tr ' ' . | xargs -n 10 | sed 's/\./ /g; s/^/ /'
+ continue
+ else
+ section="$new_section"
+ fi
+ fi
+ continue
+ ;;
+ exit|quit)
+ break
+ ;;
+ copy|yank|c|y)
+ if [ -z "$DISPLAY" ]; then
+ echo copy: supported only in the Desktop version
+ continue
+ fi
+ if [ -z "$input" ]; then
+ echo copy: Make at least one query first.
+ continue
+ else
+ curl -q -s https://cht.sh/"$(get_query_options "$query"?T)" > "$TMP1"
+ if [ "$is_macos" != yes ]; then
+ xsel -i < "$TMP1"
+ else
+ cat "$TMP1" | pbcopy
+ fi
+ echo "copy: $(wc -l "$TMP1" | awk '{print $1}') lines copied to the selection"
+ continue
+ fi
+ ;;
+ ccopy|cc|C|Y)
+ if [ -z "$DISPLAY" ]; then
+ echo copy: supported only in the Desktop version
+ continue
+ fi
+ if [ -z "$input" ]; then
+ echo copy: Make at least one query first.
+ continue
+ else
+ curl -q -s https://cht.sh/"$(get_query_options "$query"?TQ)" > "$TMP1"
+ if [ "$is_macos" != yes ]; then
+ xsel -i < "$TMP1"
+ else
+ cat "$TMP1" | pbcopy
+ fi
+ echo "copy: $(wc -l "$TMP1" | awk '{print $1}') lines copied to the selection"
+ continue
+ fi
+ ;;
+ id|"id "*)
+ id_file="$HOME/.cht.sh/id"
+
+ if [ "$input" = id ]; then
+ new_id=""
+ else
+ new_id=$(echo "$input" | sed 's/id \+//; s/ *$//; s/ /+/g')
+ fi
+ if [ "$new_id" = remove ]; then
+ if [ -e "$id_file" ]; then
+ rm -f "$id_file" && echo "id is removed"
+ else
+ echo "id was not set, so you can't remove it"
+ fi
+ continue
+ fi
+ if [ -n "$new_id" ] && [ "$new_id" != reset ] && [ "$(echo $new_id | wc -c)" -lt 16 ]; then
+ echo "ERROR: $new_id: Too short id. Minimal id length is 16. Use 'id reset' for a random id"
+ continue
+ fi
+ if [ -z "$new_id" ]; then
+ # if new_id is not specified check if we have some id already
+ # if yes, just show it
+ # if not, generate a new id
+ if [ -e "$id_file" ]; then
+ echo $(cat "$id_file" | awk '{if ($6 == "id") print $NF}' | head -1)
+ continue
+ else
+ new_id=reset
+ fi
+ fi
+ if [ "$new_id" = reset ]; then
+ new_id="$(cat /dev/urandom 2> /dev/null | env LC_CTYPE=C tr -cd 'a-f0-9' 2> /dev/null | head -c 32)"
+ else
+ echo WARNING: if someone gueses your id, he can read your cht.sh search history
+ fi
+ if [ -e "$id_file" ] && grep -q '\tid\t[^\t]\+$' "$id_file" 2> /dev/null; then
+ sed -i 's/\tid\t[^\t]\+$/ id '"$new_id"'/' "$id_file"
+ else
+ if ! [ -e "$id_file" ]; then
+ printf '#\n\n' > "$id_file"
+ fi
+ printf ".cht.sh\tTRUE\t/\tTRUE\t0\tid\t$new_id\n" >> "$id_file"
+ fi
+ echo "$new_id"
+ continue
+ ;;
+ stealth|"stealth "*)
+ if [ "$input" != stealth ]; then
+ arguments=$(echo "$input" | sed 's/stealth //; s/ /\&/')
+ fi
+ trap break SIGINT
+ if [ "$is_macos" == yes ]; then
+ past=$(pbpaste)
+ else
+ past=$(xsel -o)
+ fi
+ printf "\033[0;31mstealth:\033[0m you are in the stealth mode; select any text in any window for a query\n"
+ printf "\033[0;31mstealth:\033[0m selections longer than $STEALTH_MAX_SELECTION_LENGTH words are ignored\n"
+ if [ -n "$arguments" ]; then
+ printf "\033[0;31mstealth:\033[0m query arguments: ?$arguments\n"
+ fi
+ printf "\033[0;31mstealth:\033[0m use ^C to leave this mode\n"
+ while true; do
+ if [ $is_macos == yes ]; then
+ current=$(pbpaste)
+ else
+ current=$(xsel -o)
+ fi
+ if [ "$past" != "$current" ]; then
+ past=$current
+ current_text="$(echo $current | tr -c '[a-zA-Z0-9]' ' ')"
+ if [ $(echo $current_text | wc -w) -gt "$STEALTH_MAX_SELECTION_LENGTH" ]; then
+ echo "\033[0;31mstealth:\033[0m selection length is longer than $STEALTH_MAX_SELECTION_LENGTH words; ignoring"
+ continue
+ else
+ printf "\n\033[0;31mstealth: \033[7m $current_text\033[0m\n"
+ query=$(prepare_query "$section" "$current_text" "$arguments")
+ do_query "$query"
+ fi
+ fi
+ sleep 1;
+ done
+ trap - SIGINT
+ continue
+ ;;
+ update)
+ [ -w "$0" ] || { echo "The script is readonly; please update manually: curl -q -s https://cht.sh/:bash | sudo tee $0"; continue; }
+ TMP2=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
+ curl -q -s https://cht.sh/:cht.sh > "$TMP2"
+ if ! cmp "$0" "$TMP2" > /dev/null 2>&1; then
+ if grep -q ^__CHTSH_VERSION= "$TMP2"; then
+ args=(--shell)
+ [ -n "$section" ] && args=("${args[@]}" "$section")
+ cp "$TMP2" "$0" && echo "Updated. Restarting..." && rm "$TMP2" && CHEATSH_RESTART=1 exec "$0" "${args[@]}"
+ else
+ echo "Something went wrong. Please update manually"
+ fi
+ else
+ echo "cht.sh is up to date. No update needed"
+ fi
+ rm -f "$TMP2" > /dev/null 2>&1
+ continue
+ ;;
+ version)
+ echo "cht.sh version $__CHTSH_VERSION of $__CHTSH_DATETIME; installed at: $(stat -c %y "$0" | sed 's@\..* @ @')"
+ TMP2=$(mktemp /tmp/cht.sh.XXXXXXXXXXXXX)
+ if curl -q -s https://cht.sh/:cht.sh > "$TMP2"; then
+ if ! cmp "$0" "$TMP2" > /dev/null 2>&1; then
+ echo "Update needed (type 'update' for that)".
+ else
+ echo "Up to date. No update needed"
+ fi
+ fi
+ rm -f "$TMP2" > /dev/null 2>&1
+ continue
+ ;;
+ "")
+ continue
+ ;;
+ esac
+
+ query=$(prepare_query "$section" "$input")
+ do_query "$query"
+done