From 4f6bedc1b7f0803357968aa7ca3f7045b552aac0 Mon Sep 17 00:00:00 2001
From: Eli Bendersky <eliben@gmail.com>
Date: Wed, 5 Jun 2019 10:15:13 -0700
Subject: [PATCH] Add VERBOSE option to tools/build and generate.go

VERBOSE will be set by TRAVIS (but can also be set by user to diagnose slow
builds). Using an env var so that it automatically propagates to all the
sub-scripts and tools without having to pass it through tools/build explicitly.
---
 .travis.yml       |  5 ++++-
 tools/build       |  9 +++++++++
 tools/generate.go | 13 ++++++++++++-
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 1864bc5..54d1654 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,4 +12,7 @@ install:
   - go get -u github.com/russross/blackfriday
 
 script:
-  - 'tools/build'
+  - tools/build
+
+env:
+  - VERBOSE=1
diff --git a/tools/build b/tools/build
index 3c07db8..b3205bb 100755
--- a/tools/build
+++ b/tools/build
@@ -2,7 +2,16 @@
 
 set -e
 
+verbose() [[ -v VERBOSE ]]
+
+verbose && echo "Running tests..."
 tools/test
+
+verbose && echo "Formatting code..."
 tools/format
+
+verbose && echo "Measuring line lengths..."
 tools/measure
+
+verbose && echo "Generating HTML..."
 tools/generate
diff --git a/tools/generate.go b/tools/generate.go
index 32f542c..c840169 100644
--- a/tools/generate.go
+++ b/tools/generate.go
@@ -19,6 +19,10 @@ var cacheDir = "/tmp/gobyexample-cache"
 var siteDir = "./public"
 var pygmentizeBin = "./vendor/pygments/pygmentize"
 
+func verbose() bool {
+	return len(os.Getenv("VERBOSE")) > 0
+}
+
 func check(err error) {
 	if err != nil {
 		panic(err)
@@ -221,6 +225,7 @@ func parseAndRenderSegs(sourcePath string) ([]*Seg, string) {
 }
 
 func parseExamples() []*Example {
+	fmt.Println("Parsing examples")
 	exampleNames := readLines("examples.txt")
 	examples := make([]*Example, 0)
 	for _, exampleName := range exampleNames {
@@ -261,6 +266,9 @@ func parseExamples() []*Example {
 }
 
 func renderIndex(examples []*Example) {
+	if verbose() {
+		fmt.Println("Rendering index")
+	}
 	indexTmpl := template.New("index")
 	_, err := indexTmpl.Parse(mustReadFile("templates/index.tmpl"))
 	check(err)
@@ -274,7 +282,10 @@ func renderExamples(examples []*Example) {
 	exampleTmpl := template.New("example")
 	_, err := exampleTmpl.Parse(mustReadFile("templates/example.tmpl"))
 	check(err)
-	for _, example := range examples {
+	for i, example := range examples {
+		if verbose() {
+			fmt.Printf("Rendering %s [%d/%d]\n", example.Name, i, len(examples))
+		}
 		exampleF, err := os.Create(siteDir + "/" + example.ID)
 		check(err)
 		exampleTmpl.Execute(exampleF, example)