CH3.adoc

CH3

I used mustopenf to return File and mustopenb to return Scanner. I use Scanner to read a file line by line.

Compare

$ cat a.txt
aaa
bbb
ccc
$ cat b.txt
bbb
aaa
ccc

$ go build ch3.go io.go compare.go && ./ch3 a.txt b.txt
1:
aaa
bbb
2:
bbb
aaa

Include

$ cat file1 ; echo
AAAA
#include "file2"
BBB

$ cat file2; echo
CCC
DDD

$ go build ch3.go io.go include.go

$ cat file1 | ./ch3
AAAA
CCC
DDD
BBB

Concat

$ go build ch3.go io.go concat.go && ./ch3 file1 file2
AAAA
#include "file2"
BBB
CCC
DDD

Print

$ go build ch3.go io.go print.go && ./ch3 file1 file2


file1 Page 1


AAAA
#include "file2"
BBB


file2 Page 1


CCC
DDD

$ cat file1 file1 | ./ch3


 Page 1


AAAA
#include "file2"
BBB
AAAA
#include "file2"
BBB

Make copy

$ go build ch3.go io.go makecopy.go
$ ./ch3 file1 file1cp

$ cat file1cp
AAAA
#include "file2"
BBB

Archive

$ go build ch3.go io.go archive.go && ./ch3 -c my-archive  file1 file2

$ cat my-archive
-h- file1 26
AAAA
#include "file2"
BBB
-h- file2 8
CCC
DDD

Archive (more commands)

table

$ go build ch3.go io.go archive.go && ./ch3 -t my-archive
file1 26
file2 8

$ go build ch3.go io.go archive.go && ./ch3 -t my-archive  some-file
some-file: not in archive

$ go build ch3.go io.go archive.go && ./ch3 -t my-archive  file2
file2 8

extract

$ go build ch3.go io.go archive.go && ./ch3 -p my-archive  file2
CCC
DDD

$ go build ch3.go io.go archive.go && ./ch3 -p my-archive  file1
AAAA
#include "file2"
BBB

$ rm file2 && go build ch3.go io.go archive.go && ./ch3 -x my-archive  file2 && cat file2
CCC
DDD

$ go build ch3.go io.go archive.go && ./ch3 -x my-archive  file3
file3: not in archive

delete

$ go build ch3.go io.go archive.go && ./ch3 -d my-archive  file1
ravil@ravils-mbp-2 ~/projects/software-tools-in-go/ch3 (ch3)
$ cat my-archive
-h- file2 8CCC
DDD

update

$ echo new line >> file2

$ go build ch3.go io.go archive.go && ./ch3 -u my-archive  file2

$ go build ch3.go io.go archive.go && ./ch3 -p my-archive  file2
CCC
DDD
new line