Source detection

Execute script¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
bash script.sh

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="main")
# declare -a BASH_ARGV=()
# $0=script.sh

Execute script with args¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
bash script.sh arg1 arg2

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="main")
# declare -a BASH_ARGV=()
# $0=script.sh

Source script¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
. script.sh

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh" [2]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="main")
# declare -a BASH_ARGV=([0]="script.sh")
# $0=test_script.sh

Source script with args¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
. script.sh arg1 arg2

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh" [2]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="main")
# declare -a BASH_ARGV=([0]="arg2" [1]="arg1")
# $0=test_script.sh

Source via bash -c¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
bash -c ". script.sh"

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source")
# declare -a BASH_ARGV=([0]="script.sh")
# $0=bash

Source via bash -c with args¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >script.sh
bash -c ". script.sh arg1 arg2"

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source")
# declare -a BASH_ARGV=([0]="arg2" [1]="arg1")
# $0=bash

Source from function¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >script.sh
. script.sh

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh" [2]="script.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="script.sh")
# $0=test_script.sh

Source from function with args¶

echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >script.sh
. script.sh arg1 arg2

# declare -a BASH_SOURCE=([0]="script.sh" [1]="script.sh" [2]="script.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="arg2" [1]="arg1")
# $0=test_script.sh

Nested source (no args)¶

echo '. b.sh' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >b.sh
. a.sh

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="a.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="b.sh" [1]="a.sh")
# $0=test_script.sh

Nested source with args at second level (b.sh)¶

echo '. b.sh arg1 arg2' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >b.sh
. a.sh

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="a.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="a.sh")
# $0=test_script.sh

Nested source with args at first level (a.sh) only¶

echo '. b.sh' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >b.sh
. a.sh arg1 arg2

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="a.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="b.sh" [1]="arg2" [2]="arg1")
# $0=test_script.sh

Nested source with args at both levels¶

echo '. b.sh arg1 arg2' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; checker' >b.sh
. a.sh arg3 arg4

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="a.sh" [3]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="source" [2]="source" [3]="main")
# declare -a BASH_ARGV=([0]="arg4" [1]="arg3")
# $0=test_script.sh

Nested source from function (no args)¶

echo '. b.sh' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >b.sh
. a.sh

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="b.sh" [3]="a.sh" [4]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="source" [4]="main")
# declare -a BASH_ARGV=([0]="b.sh" [1]="a.sh")
# $0=test_script.sh

Nested source from function with args at second level¶

echo '. b.sh arg1 arg2' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >b.sh
. a.sh

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="b.sh" [3]="a.sh" [4]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="source" [4]="main")
# declare -a BASH_ARGV=([0]="a.sh")
# $0=test_script.sh

Nested source from function with args at first level¶

echo '. b.sh' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >b.sh
. a.sh arg1 arg2

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="b.sh" [3]="a.sh" [4]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="source" [4]="main")
# declare -a BASH_ARGV=([0]="b.sh" [1]="arg2" [2]="arg1")
# $0=test_script.sh

Nested source from function with args at both levels¶

echo '. b.sh arg1 arg2' >a.sh
echo 'checker() { declare -p BASH_SOURCE FUNCNAME BASH_ARGV; echo "\$0=$0"; }; func() { checker; }; func' >b.sh
. a.sh arg3 arg4

# declare -a BASH_SOURCE=([0]="b.sh" [1]="b.sh" [2]="b.sh" [3]="a.sh" [4]="test_script.sh")
# declare -a FUNCNAME=([0]="checker" [1]="func" [2]="source" [3]="source" [4]="main")
# declare -a BASH_ARGV=([0]="arg4" [1]="arg3")
# $0=test_script.sh