feat: make install using lt

First working version of lt, Added a makefile (not installed).
Could get rid of ~/.git which was interfering with rg, fzf.

1 files changed, 72 insertions, 0 deletions

diff --git a/bin/lt b/bin/lt
new file mode 100755
index 0000000..21afaf0
--- /dev/null
+++ b/bin/lt
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+# link tree
+
+lt_version='lt-0.1'
+unset CDPATH
+export LC_ALL=C IFS='   
+'
+
+# ca returns the common ancestor between 2 paths
+# ca /h/u/a/b /h/u/c/d => /h/u
+ca() {
+	ca_p1=${1#/} ca_p2=${2#/} ca_r1= ca_r2= R1=/
+	while true; do
+		[ "$ca_p1" ] || [ "$ca_p2" ] || break
+		ca_r1=$ca_r1/${ca_p1%%/*} ca_p1=${ca_p1#*/}
+		ca_r2=$ca_r2/${ca_p2%%/*} ca_p2=${ca_p2#*/}
+		[ "$ca_r1" != "$ca_r2" ] && break
+		R1=$ca_r1
+	done
+}
+
+#echo ca $1 $2 && ca $1 $2 && echo "$R1"
+
+# bp returns the relative path from source to base
+bp() {
+	bp_s=$1 bp_b=$2 R1=
+	while true; do
+		[ "$bp_b" = "$bp_s" ] && break
+		bp_s=${bp_s%/*}
+		[ "$R1" ] && R1=$R1/.. || R1=..
+	done
+}
+
+#echo bp /h/u/a /h/u && bp /h/u/a /h/u && echo "$R1"
+
+# rp returns the relative path between src and base
+# rp /h/u/a/b/f /h/u/b/f [/h/u] ../a/b/f
+rp() {
+	rp_s=$1 rp_d=$2 rp_c=$3
+	! [ "$rp_c" ] && ca "$1" "$2" && rp_c=$R1
+	rp_bd=${rp_d#$rp_c/}
+	rp_bs=${rp_s#$rp_c/}
+	bp "$rp_d" "$rp_c" && R1=$R1/$rp_bs && R1=${R1#../}
+}
+
+#rp /h/u/a/b /h/u/b && echo $R1
+
+skip=".git .gitignore .*.swp Makefile"
+
+# link tree src dest
+lt() {
+	d=$(mkdir -p "$2" && cd "$2" && pwd)
+	cd "$1" && s=$PWD
+	find . ! -type d -print | {
+		cd "$d"
+		while read f; do
+			for k in $skip; do
+				case $f in (./$k|./$k/*) continue 2;; esac
+			done
+			f=${f#./}
+			fd=$d/$f; fd=${fd%/*}
+			test -d "$fd" || $trace mkdir -p "$fd"
+			rp "$s/$f" "$d/$f" && $trace ln -sf "$R1" "$d/$f"
+		done
+	}
+}
+
+#trace=echo
+lt "$1" "$2"
+
+#echo $1 $2 $3 && $1 $2 $3 && echo $R1