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builder: provide a friendly message on parser errors

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Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
This commit is contained in:
Erik Hollensbe 2014-10-15 18:08:23 +00:00
parent 63637b9d27
commit 3f2eb353bd
1 changed files with 1 additions and 1 deletions
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2
builder/parser/utils.go
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@ -73,7 +73,7 @@ func splitCommand(line string) (string, string, error) {
cmdline := TOKEN_WHITESPACE.Split(line, 2)
if len(cmdline) != 2 {
return "", "", fmt.Errorf("We do not understand this file. Please ensure it is a valid Dockerfile.")
return "", "", fmt.Errorf("We do not understand this file. Please ensure it is a valid Dockerfile. Parser error at %q", line)
}
cmd := strings.ToLower(cmdline[0])