From: Colin P. Mccabe <colin@cmccabe.xyz>
Date: Mon, 22 Jul 2019 18:06:44 +0000 (-0700)
Subject: Add path-fixer to remove duplicate lines from PATH
X-Git-Url: http://club.cc.cmu.edu/~cmccabe/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41bfed00f6e4c53d1be5031218c0b8614a16a463;p=cmccabe-bin

Add path-fixer to remove duplicate lines from PATH
---

diff --git a/.gitignore b/.gitignore
index da93917..b17d6aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 
 # binaries
 bytor
+path-fixer
 errno_speak
 simple_time
 vimstart
diff --git a/Makefile b/Makefile
index db04831..a4d7136 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS=-Wall -O2
 
-all:		audiobooker bytor errno_speak show_default_sockopts random_word simple_time vimstart hexconv
+all:		audiobooker bytor path-fixer errno_speak show_default_sockopts random_word simple_time vimstart hexconv
 
 audiobooker:
 	go build audiobooker.go
@@ -8,6 +8,9 @@ audiobooker:
 bytor:
 	go build bytor.go
 
+path-fixer:
+	go build path-fixer.go
+
 errno_speak:	errno_speak.o
 
 show_default_sockopts:	show_default_sockopts.o
@@ -21,4 +24,4 @@ hexconv:	hexconv.o
 random_word:	random_word.o
 
 clean:
-	rm -rf bytor errno_speak show_default_sockopts simple_time vimstart hexconv *.o
+	rm -rf bytor path-fixer errno_speak show_default_sockopts simple_time vimstart hexconv *.o
diff --git a/path-fixer.go b/path-fixer.go
new file mode 100644
index 0000000..e43a471
--- /dev/null
+++ b/path-fixer.go
@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	path := os.Getenv("PATH")
+	entries := make(map[string]bool)
+	var bld strings.Builder
+	prefix := ""
+	for {
+		index := strings.Index(path, ":")
+		var entry string
+		if index >= 0 {
+			entry = path[:index]
+		} else {
+			entry = path
+		}
+		if !entries[entry] {
+			entries[entry] = true
+			bld.WriteString(prefix)
+			prefix = ":"
+			bld.WriteString(entry)
+		}
+		if index < 0 {
+			break
+		} else {
+			path = path[index+1:]
+		}
+	}
+	fmt.Printf("%s", bld.String())
+}