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-rw-r--r--tv/5pkgs/simple/bash-fzf-history.nix91
1 files changed, 91 insertions, 0 deletions
diff --git a/tv/5pkgs/simple/bash-fzf-history.nix b/tv/5pkgs/simple/bash-fzf-history.nix
new file mode 100644
index 000000000..e9a21b95d
--- /dev/null
+++ b/tv/5pkgs/simple/bash-fzf-history.nix
@@ -0,0 +1,91 @@
+with import <stockholm/lib>;
+{ pkgs
+
+, edit-key ? "ctrl-e"
+, exec-key ? "enter"
+, edit-mark ? "${mark-prefix}${edit-key}"
+, exec-mark ? "${mark-prefix}${exec-key}"
+, edit-command ? "\"\""
+, exec-command ? "accept-line"
+, mark-prefix ? " #FZFKEY:"
+, finish-keyseq ? "\\C-x\\C-p"
+, rebind-keyseq ? "\\C-x\\C-o"
+
+, start-keyseq ? "\\C-f"
+, load-keyseq ? start-keyseq
+}: let
+ script = pkgs.writeBash "bash-fzf-history.sh" ''
+ if ! command -v fzf >/dev/null; then
+ # Alternatively rewrite ${pkgs.fzf}/share/fzf/* to use absolute paths.
+ fzf() {
+ ${pkgs.fzf}/bin/fzf "$@"
+ }
+ fi
+
+ . ${pkgs.fzf}/share/fzf/key-bindings.bash
+ . ${pkgs.fzf}/share/fzf/completion.bash
+
+ FZF_DEFAULT_OPTS='${toString [
+ /* sh */ "--height=40%"
+ /* sh */ "--inline-info"
+ /* sh */ "--min-height=4"
+ /* sh */ "--reverse"
+ ]}'
+
+ __fzf_history__() (
+ result=$(
+ HISTTIMEFORMAT= history |
+ FZF_DEFAULT_OPTS="${toString [
+ /* sh */ "--tac"
+ /* sh */ "--sync"
+ /* sh */ "-n2..,.."
+ /* sh */ "--tiebreak=index"
+ /* sh */ "--bind=ctrl-r:toggle-sort"
+ /* sh */ "--expect=${edit-key},${exec-key}"
+ /* sh */ "$FZF_DEFAULT_OPTS"
+ /* sh */ "+m"
+ ]}" \
+ ${pkgs.fzf}/bin/fzf
+ )
+ if test -n "$result"; then
+ shopt -s extglob
+
+ key=''${result%%$'\n'*}
+ line=''${result##*([^0-9])}
+ index=''${line%%[^0-9]*}
+ command=''${line##*([0-9 ])}
+
+ echo "$command${mark-prefix}$key"
+ else
+ # Ensure no empty new line gets produced when fzf was aborted.
+ echo '${edit-mark}'
+ fi
+ )
+
+ __fzf_rebind_finish_keyseq__() {
+ local suffix=
+ case $READLINE_LINE in
+ *'${edit-mark}')
+ suffix='${edit-mark}'
+ bind '"${finish-keyseq}": ${edit-command}'
+ ;;
+ *'${exec-mark}')
+ suffix='${exec-mark}'
+ bind '"${finish-keyseq}": ${exec-command}'
+ ;;
+ esac
+ READLINE_LINE=${"\${READLINE_LINE:0:-\${#suffix}}"}
+ }
+ bind -x '"${rebind-keyseq}": __fzf_rebind_finish_keyseq__'
+
+ bind '"\C-r": reverse-search-history'
+ bind '"${start-keyseq}": " \C-e\C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er\e^${rebind-keyseq}${finish-keyseq}"'
+
+ echo '# fzf key bindings loaded:' >&2
+ bind -s | ${pkgs.gnugrep}/bin/grep __fzf_ >&2
+ '';
+in
+ script //
+ rec {
+ bind = /* sh */ ''bind -x '"${load-keyseq}": . ${script}' '';
+ }