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Handle multi-digit positional parameters 

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2018-05-25 18:49:54 +02:00
parent 9654e9b6f8
commit 2628896b5e
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GPG Key ID: 76698F39D527CE8C
2 changed files with 30 additions and 1 deletions
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21
builder/dockerfile/shell/envVarTest
View File

@ -174,6 +174,22 @@ A|$9 |
A|${9} |
A|${9:+bbb} |
A|${9:-bbb} | bbb
A|$999 |
A|${999} |
A|${999:+bbb} |
A|${999:-bbb} | bbb
A|$999aaa | aaa
A|${999}aaa | aaa
A|${999:+bbb}aaa | aaa
A|${999:-bbb}aaa | bbbaaa
A|$001 |
A|${001} |
A|${001:+bbb} |
A|${001:-bbb} | bbb
A|$001aaa | aaa
A|${001}aaa | aaa
A|${001:+bbb}aaa | aaa
A|${001:-bbb}aaa | bbbaaa
# Special parameters won't be set in the Dockerfile:
# http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_05_02
@ -181,6 +197,11 @@ A|$@ |
A|${@} |
A|${@:+bbb} |
A|${@:-bbb} | bbb
A|$@@@ | @@
A|$@aaa | aaa
A|${@}aaa | aaa
A|${@:+bbb}aaa | aaa
A|${@:-bbb}aaa | bbbaaa
A|$* |
A|${*} |
A|${*:+bbb} |

10
builder/dockerfile/shell/lex.go
View File

@ -318,7 +318,15 @@ func (sw *shellWord) processName() string {
for sw.scanner.Peek() != scanner.EOF {
ch := sw.scanner.Peek()
if name.Len() == 0 && (unicode.IsDigit(ch) || isSpecialParam(ch)) {
if name.Len() == 0 && unicode.IsDigit(ch) {
for sw.scanner.Peek() != scanner.EOF && unicode.IsDigit(sw.scanner.Peek()) {
// Keep reading until the first non-digit character, or EOF
ch = sw.scanner.Next()
name.WriteRune(ch)
}
return name.String()
}
if name.Len() == 0 && isSpecialParam(ch) {
ch = sw.scanner.Next()
return string(ch)
}