From 0829ebc9962cae1aabcdf234de34938678d6d97a Mon Sep 17 00:00:00 2001
From: Mark McGranaghan <mmcgrana@gmail.com>
Date: Mon, 1 Oct 2012 17:26:19 -0700
Subject: [PATCH] add tool/measure

---
 .gitignore                                    |  3 +-
 src/043-state-goroutine/state-goroutine.go    |  2 +-
 tool/build-html                               |  2 +-
 tool/compile                                  |  3 +-
 tool/measure                                  |  6 +++
 tool/src/{generate.go => build-html-inner.go} |  2 -
 tool/src/measure-inner.go                     | 42 +++++++++++++++++++
 7 files changed, 54 insertions(+), 6 deletions(-)
 create mode 100755 tool/measure
 rename tool/src/{generate.go => build-html-inner.go} (98%)
 create mode 100644 tool/src/measure-inner.go

diff --git a/.gitignore b/.gitignore
index e58e6db..8991f3b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 build
-tool/generate
+tool/build-html-inner
 tool/number
+tool/measure-inner
 
diff --git a/src/043-state-goroutine/state-goroutine.go b/src/043-state-goroutine/state-goroutine.go
index c90c313..6eff8b4 100644
--- a/src/043-state-goroutine/state-goroutine.go
+++ b/src/043-state-goroutine/state-goroutine.go
@@ -64,7 +64,7 @@ func generateWrites(writes chan *writeOp) {
         key := randKey()
         val := randVal()
         write := &writeOp{
-            key: key,
+            key:  key,
             val:  val,
             resp: make(chan bool)}
         writes <- write
diff --git a/tool/build-html b/tool/build-html
index 9748440..75b38a3 100755
--- a/tool/build-html
+++ b/tool/build-html
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-ls src/0*/*.{go,sh} | xargs tool/generate > build/go-by-example.html
+ls src/0*/*.{go,sh} | xargs tool/build-html-inner > build/go-by-example.html
diff --git a/tool/compile b/tool/compile
index ce6f04b..55753f2 100755
--- a/tool/compile
+++ b/tool/compile
@@ -2,5 +2,6 @@
 
 set -e
 
-go build -o tool/generate tool/src/generate.go 
+go build -o tool/build-html-inner tool/src/build-html-inner.go 
 go build -o tool/number tool/src/number.go
+go build -o tool/measure-inner tool/src/measure-inner.go
diff --git a/tool/measure b/tool/measure
new file mode 100755
index 0000000..44fcafa
--- /dev/null
+++ b/tool/measure
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -e
+set -o pipefail
+
+ls src/0*/*.{go,sh} | xargs tool/measure-inner
diff --git a/tool/src/generate.go b/tool/src/build-html-inner.go
similarity index 98%
rename from tool/src/generate.go
rename to tool/src/build-html-inner.go
index fd8e75b..8d79fbf 100644
--- a/tool/src/generate.go
+++ b/tool/src/build-html-inner.go
@@ -1,5 +1,3 @@
-// Generate an HTML file from the book source. Derived from golit.
-
 package main
 
 import (
diff --git a/tool/src/measure-inner.go b/tool/src/measure-inner.go
new file mode 100644
index 0000000..9edbf22
--- /dev/null
+++ b/tool/src/measure-inner.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+    "fmt"
+    "io/ioutil"
+    "os"
+    "strings"
+)
+
+func check(err error) {
+    if err != nil {
+        panic(err)
+    }
+}
+
+func readLines(path string) []string {
+    srcBytes, err := ioutil.ReadFile(path)
+    check(err)
+    return strings.Split(string(srcBytes), "\n")
+}
+
+func main() {
+    if len(os.Args) <= 1 {
+        fmt.Fprintln(os.Stderr, "usage: tool/measure *.{go,sh}")
+        os.Exit(1)
+    }
+    foundLongFile := false
+    for _, sourcePath := range os.Args[1:] {
+        foundLongLine := false
+        lines := readLines(sourcePath)
+        for _, line := range lines {
+            if len(line) > 60 && !foundLongLine {
+                fmt.Println(sourcePath)
+                foundLongLine = true
+                foundLongFile = true
+            }
+        }
+    }
+    if foundLongFile {
+        os.Exit(1)
+    }
+}