#!/usr/bin/env bash

# @(#) s1	Demonstrate PHONY makefile targets.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

pl " Makefile:"
cat Makefile

pl " Command to execute if anything out of date:"
cat s2

pl " Initial content of files" [a-z].txt
cat [a-d].txt

pl " Results for touching conf:"
touch abcd.conf
make
cat [a-d].txt

pl " Results for touching a.txt:"
touch a.txt
make
cat [a-d].txt

% ./s1

-----
 Makefile:
# Sun Feb  6 15:37:15 CST 2011

.PHONY: all
all: a.txt b.txt c.txt d.txt abcd.conf
	./s2 abcd.conf

-----
 Command to execute if anything out of date:
#!/usr/bin/env bash

# @(#) s2	Add one to change content of files.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

for file in [abcd].txt
do
  t1=$( cat $file )
  (( t1++ ))
  pe "$t1" > $file
done

-----
 Initial content of files a.txt b.txt c.txt d.txt
0
0
0
0

-----
 Results for touching conf:
./s2 abcd.conf
1
1
1
1

-----
 Results for touching a.txt:
./s2 abcd.conf
2
2
2
2

#!/usr/bin/env bash

# @(#) s1	Demonstrate PHONY makefile targets.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

M=m2
pl " Makefile, $M:"
cat $M

pl " Command to execute if anything out of date:"
cat s2

pl " Initial content of files" [a-z].txt
cat [a-d].txt

pl " Results for touching a.txt:"
touch a.txt
make -f $M
cat [a-d].txt

pl " Results for touching c.txt:"
sleep 1
touch c.txt
make -f $M
cat [a-d].txt

pl " Results for plain make, nothing out of date:"
sleep 1
make -f $M
cat [a-d].txt

pl " Results for touching abcd.conf, backdated 5 seconds:"
t1=$(date --date="now - 5 sec" +'%Y%m%d%H%M.%S')
touch -t "$t1" abcd.conf
make -f $M
cat [a-d].txt

% ./s1

-----
 Makefile, m2:
# Sun Feb  6 15:37:15 CST 2011

abcd.conf: a.txt b.txt c.txt d.txt 
	./s2 abcd.conf
	touch abcd.conf

-----
 Command to execute if anything out of date:
#!/usr/bin/env bash

# @(#) s2	Add one to change content of files.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

for file in [abcd].txt
do
  t1=$( cat $file )
  (( t1++ ))
  pe "$t1" > $file
done

-----
 Initial content of files a.txt b.txt c.txt d.txt
0
0
0
0

-----
 Results for touching a.txt:
./s2 abcd.conf
touch abcd.conf
1
1
1
1

-----
 Results for touching c.txt:
./s2 abcd.conf
touch abcd.conf
2
2
2
2

-----
 Results for plain make, nothing out of date:
make: `abcd.conf' is up to date.
2
2
2
2

-----
 Results for touching abcd.conf, backdated 5 seconds:
./s2 abcd.conf
touch abcd.conf
3
3
3
3