confd fails to read non-string keys when using file backend

[marwatk]

The yaml file backend only has cases for string, array and map in the switch that loads values. As a result anything not matching those types will fail to load. I think the expected behavior would be to coerce everything else to string.

Example:

#!/bin/bash

DIR=`mktemp -d`
pushd $DIR
mkdir conf.d
mkdir templates

cat << EOF > conf.d/test.toml
[template]
keys = [
    "/foo/stringVal",
    "/foo/intVal",
]
src = "test.txt.tmpl"
dest = "test.txt"
EOF

cat << EOF > templates/test.txt.tmpl
string: {{getv "/foo/stringVal"}}
int: {{getv "/foo/intVal"}}
EOF

cat << EOF > test.yml
foo:
  stringVal: string
  intVal: 1234
EOF

confd -onetime -log-level debug -confdir . -backend file -file test.yml

cat test.txt
popd
rm -rf $DIR

Output:

2017-12-11T15:50:32-07:00  confd[31669]: INFO Backend set to file
2017-12-11T15:50:32-07:00  confd[31669]: INFO Starting confd
2017-12-11T15:50:32-07:00  confd[31669]: INFO Backend source(s) set to test.yml
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Loading template resources from confdir .
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Found template: conf.d/test.toml
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Loading template resource from conf.d/test.toml
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Retrieving keys from store
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Key prefix set to /
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Key Map: map[string]string{"/foo/stringVal":"string"}
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Got the following map from store: map[/foo/stringVal:string]
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Using source template templates/test.txt.tmpl
2017-12-11T15:50:32-07:00  confd[31669]: DEBUG Compiling source template templates/test.txt.tmpl
2017-12-11T15:50:32-07:00  confd[31669]: ERROR template: test.txt.tmpl:2:7: executing "test.txt.tmpl" at <getv "/foo/intVal">: error calling getv: key does not exist: /foo/intVal
2017-12-11T15:50:32-07:00  confd[31669]: FATAL template: test.txt.tmpl:2:7: executing "test.txt.tmpl" at <getv "/foo/intVal">: error calling getv: key does not exist: /foo/intVal

[okushchenko]

@marwatk sounds like a good idea, please, take a shot at opening PR with a fix.

[lucastheisen]

@okushchenko , i submitted a pull request here...