| 1 | #!/usr/bin/env bash |
| 2 | |
| 3 | ### Locals don't leak |
| 4 | f() { |
| 5 | local f_var=f_var |
| 6 | } |
| 7 | f |
| 8 | echo $f_var |
| 9 | # stdout: |
| 10 | |
| 11 | ### Globals leak |
| 12 | f() { |
| 13 | f_var=f_var |
| 14 | } |
| 15 | f |
| 16 | echo $f_var |
| 17 | # stdout: f_var |
| 18 | |
| 19 | ### Return statement |
| 20 | f() { |
| 21 | echo one |
| 22 | return 42 |
| 23 | echo two |
| 24 | } |
| 25 | f |
| 26 | # stdout: one |
| 27 | # status: 42 |
| 28 | |
| 29 | ### Dynamic Scope |
| 30 | f() { |
| 31 | echo $g_var |
| 32 | } |
| 33 | g() { |
| 34 | local g_var=g_var |
| 35 | f |
| 36 | } |
| 37 | g |
| 38 | # stdout: g_var |
| 39 | |
| 40 | ### Dynamic Scope Mutation (wow this is bad) |
| 41 | f() { |
| 42 | g_var=f_mutation |
| 43 | } |
| 44 | g() { |
| 45 | local g_var=g_var |
| 46 | f |
| 47 | echo "g: $g_var" |
| 48 | } |
| 49 | g |
| 50 | # stdout: g: f_mutation |
| 51 | |
| 52 | ### Assign local separately |
| 53 | f() { |
| 54 | local f |
| 55 | f='new-value' |
| 56 | echo "[$f]" |
| 57 | } |
| 58 | f |
| 59 | # stdout: [new-value] |
| 60 | # status: 0 |
| 61 | |
| 62 | ### Assign a local and global on same line |
| 63 | myglobal= |
| 64 | f() { |
| 65 | local mylocal |
| 66 | mylocal=L myglobal=G |
| 67 | echo "[$mylocal $myglobal]" |
| 68 | } |
| 69 | f |
| 70 | echo "[$mylocal $myglobal]" |
| 71 | # stdout-json: "[L G]\n[ G]\n" |
| 72 | # status: 0 |