No re-build issue cosmtrek/air

.air.toml

root = "."
testdata_dir = "testdata"
tmp_dir = "tmp"

[build]
  bin = "./tmp/main"
  cmd = "go build -o ./tmp/main ."
  delay = 1000
  exclude_dir = ["assets", "tmp", "vendor", "testdata"]
  exclude_file = []
  exclude_regex = ["_test.go"]
  exclude_unchanged = true
  follow_symlink = false
  full_bin = ""
  include_dir = []
  include_ext = ["go", "tpl", "tmpl", "html", "txt"]
  kill_delay = "1s"
  log = "build-errors.log"
  send_interrupt = true
  stop_on_error = false

[color]
  app = ""
  build = "yellow"
  main = "magenta"
  runner = "green"
  watcher = "cyan"

[log]
  time = false

[misc]
  clean_on_exit = true

README.md

1. Start using air -d in one terminal
2. In another terminal run the following:

   echo -n "abc" | tee a1.txt; echo -n "def2" | tee b1.txt

3. You'll see that re-build is not triggered.

a1.txt

abc

b1.txt

def

logs.txt

  __    _   ___
 / /\  | | | |_)
/_/--\ |_| |_| \_ , built with Go

[debug] mode
CWD: /tmp/air-bug
watching .
!exclude tmp
building...
!exclude checksum .
!exclude checksum .air.toml
!exclude checksum .git
!exclude checksum README.md
stored checksum for a1.txt: ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
stored checksum for b1.txt: da1464fd7ceaf38ff56043bc1774af4fb5cb83ef5358981d78de0b8be5a6fbcb
stored checksum for main.go: e660c032e6e97e9ce24a044a4dd8da0bb0eb3f68304342f8c9898091d66e0eac
!exclude checksum tmp
running...
a1: abc | b1: def

a1: abc | b1: def

a1: abc | b1: def

event: "/tmp/air-bug/a1.txt": WRITE|CHMOD
a1.txt has changed in watcher
reaching events - /tmp/air-bug/a1.txt
event: "/tmp/air-bug/b1.txt": CHMOD
event: "/tmp/air-bug/b1.txt": WRITE
b1.txt has changed in watcher
flushing events
skipping a1.txt because contents unchanged
a1: abc | b1: def

a1: abc | b1: def

main.go

package main

import (
	"fmt"
	"io/ioutil"
	"time"
)

func main() {
	a1, _ := ioutil.ReadFile("./a1.txt")
	b1, _ := ioutil.ReadFile("./b1.txt")

	for {
		fmt.Printf("a1: %s | b1: %s\n", string(a1), string(b1))
		time.Sleep(time.Second * 5)
	}
}