Eric Lessard created FELIX-5711:
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Summary: FileInstall drops escape characters when writing
configuration file back to disk
Key: FELIX-5711
URL: https://issues.apache.org/jira/browse/FELIX-5711
Project: Felix
Issue Type: Bug
Components: File Install
Affects Versions: fileinstall-3.6.0
Reporter: Eric Lessard
FileInstall allows substitution characters to be escaped so they are kept as-is
when read from a configuration file and in memory. So, for the following
configuration file property:
{noformat}
property = $\{value\}
{noformat}
The following key/value pair will be present in memory:
{noformat}
property, ${value}
{noformat}
This works well unless FileInstall is configured to write the configurations
back to disk ({{felix.fileinstall.enableConfigSave=true}}). In that case, the
value is written back to the file as-is, i.e., without the {{\}} escape
characters:
{noformat}
property = ${value}
{noformat}
At that point, if the file needs to be read back in (e.g., content or time
stamp of the file changes), substitution will occurs since the substitution
characters were not escaped when the value was written back out to the file.
Since the only way for the substitution characters to be present in memory
inside a value is if they have been previously escaped when the file was read
in, then they should also be escaped when written back out so they remain
unchanged if they ever need to be read in again.
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