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config: fixed issues with flags/options set by environment vars.

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Some environment variables didn’t behave like their corresponding
command line flags. The affected flags were --stats, --log-level,
--separator, --multi-tread-streams, --rc-addr, --rc-user and --rc-pass.
Example:

    RCLONE_STATS='10s'
    rclone check remote: remote: --progress
    # Expected: rclone check remote: remote: --progress –-stats=10s
    # Actual: rclone check remote: remote: --progress

Remote specific options set by environment variables was overruled by
less specific backend options set by environment variables. Example:

    RCLONE_DRIVE_USE_TRASH='false'
    RCLONE_CONFIG_MYDRIVE_USE_TRASH='true'
    rclone deletefile myDrive:my-test-file
    # Expected: my-test-file is recoverable in the trash folder
    # Actual: my-test-file is permanently deleted (not recoverable)

Backend specific options set by environment variables was overruled by
general backend options set by environment variables. Example:

    RCLONE_SKIP_LINKS='true'
    RCLONE_LOCAL_SKIP_LINKS='false'
    rclone lsd local:
    # Expected result: Warnings when symlinks are skipped
    # Actual result: No warnings when symlinks are skipped
    # That is RCLONE_SKIP_LINKS takes precedence

The above issues have been fixed.

The debug logging (-vv) has been enhanced to show when flags are set by
environment variables.

The documentation has been enhanced with details on the precedence of
configuration options.

See pull request #5341 for more information.
This commit is contained in:
Ole Frost 2021-05-20 14:08:01 +02:00 committed by Nick Craig-Wood
parent fee0abf513
commit 58c99427b3
6 changed files with 117 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cmd/cmd.go
View File

@ -539,7 +539,8 @@ func AddBackendFlags() {
if opt.IsPassword {
help += " (obscured)"
}
flag := flags.VarPF(pflag.CommandLine, opt, name, opt.ShortOpt, help)
flag := pflag.CommandLine.VarPF(opt, name, opt.ShortOpt, help)
flags.SetDefaultFromEnv(pflag.CommandLine, name)
if _, isBool := opt.Default.(bool); isBool {
flag.NoOptDefVal = "true"
}

22
docs/content/docs.md
View File

@ -2129,6 +2129,8 @@ Or to always use the trash in drive `--drive-use-trash`, set
The same parser is used for the options and the environment variables
so they take exactly the same form.
The options set by environment variables can be seen with the `-vv` flag, e.g. `rclone version -vv`.
### Config file ###
You can set defaults for values in the config file on an individual
@ -2165,16 +2167,20 @@ it is probably easier to use those instead which makes the above example
The various different methods of backend configuration are read in
this order and the first one with a value is used.
- Flag values as supplied on the command line, e.g. `--drive-use-trash`.
- Remote specific environment vars, e.g. `RCLONE_CONFIG_MYREMOTE_USE_TRASH` (see above).
- Backend specific environment vars, e.g. `RCLONE_DRIVE_USE_TRASH`.
- Config file, e.g. `use_trash = false`.
- Default values, e.g. `true` - these can't be changed.
- Parameters in connection strings, e.g. `myRemote,skip_links:`
- Flag values as supplied on the command line, e.g. `--skip-links`
- Remote specific environment vars, e.g. `RCLONE_CONFIG_MYREMOTE_SKIP_LINKS` (see above).
- Backend specific environment vars, e.g. `RCLONE_LOCAL_SKIP_LINKS`.
- Backend generic environment vars, e.g. `RCLONE_SKIP_LINKS`.
- Config file, e.g. `skip_links = true`.
- Default values, e.g. `false` - these can't be changed.
So if both `--drive-use-trash` is supplied on the config line and an
environment variable `RCLONE_DRIVE_USE_TRASH` is set, the command line
So if both `--skip-links` is supplied on the command line and an
environment variable `RCLONE_LOCAL_SKIP_LINKS` is set, the command line
flag will take preference.
The backend configurations set by environment variables can be seen with the `-vv` flag, e.g. `rclone about myRemote: -vv`.
For non backend configuration the order is as follows:
- Flag values as supplied on the command line, e.g. `--stats 5s`.
@ -2189,3 +2195,5 @@ For non backend configuration the order is as follows:
- The environment values may be either a complete URL or a "host[:port]" for, in which case the "http" scheme is assumed.
- `USER` and `LOGNAME` values are used as fallbacks for current username. The primary method for looking up username is OS-specific: Windows API on Windows, real user ID in /etc/passwd on Unix systems. In the documentation the current username is simply referred to as `$USER`.
- `RCLONE_CONFIG_DIR` - rclone **sets** this variable for use in config files and sub processes to point to the directory holding the config file.
The options set by environment variables can be seen with the `-vv` and `--log-level=DEBUG` flags, e.g. `rclone version -vv`.

15
fs/config.go
View File

@ -3,6 +3,7 @@ package fs
import (
"context"
"net"
"os"
"strings"
"time"
@ -169,6 +170,20 @@ func NewConfig() *ConfigInfo {
c.FsCacheExpireDuration = 300 * time.Second
c.FsCacheExpireInterval = 60 * time.Second
// Perform a simple check for debug flags to enable debug logging during the flag initialization
for argIndex, arg := range os.Args {
if strings.HasPrefix(arg, "-vv") && strings.TrimRight(arg, "v") == "-" {
c.LogLevel = LogLevelDebug
}
if arg == "--log-level=DEBUG" || (arg == "--log-level" && len(os.Args) > argIndex+1 && os.Args[argIndex+1] == "DEBUG") {
c.LogLevel = LogLevelDebug
}
}
envValue, found := os.LookupEnv("RCLONE_LOG_LEVEL")
if found && envValue == "DEBUG" {
c.LogLevel = LogLevelDebug
}
return c
}

124
fs/config/flags/flags.go
View File

@ -11,194 +11,206 @@ import (
"github.com/spf13/pflag"
)
// setDefaultFromEnv constructs a name from the flag passed in and
// sets the default from the environment if possible.
func setDefaultFromEnv(flags *pflag.FlagSet, name string) {
key := fs.OptionToEnv(name)
newValue, found := os.LookupEnv(key)
// setValueFromEnv constructs a name from the flag passed in and
// sets the value and default from the environment if possible
// the value may be overridden when the command line is parsed
//
// Used to create non-backend flags like --stats
func setValueFromEnv(flags *pflag.FlagSet, name string) {
envKey := fs.OptionToEnv(name)
envValue, found := os.LookupEnv(envKey)
if found {
flag := flags.Lookup(name)
if flag == nil {
log.Fatalf("Couldn't find flag --%q", name)
}
err := flag.Value.Set(newValue)
err := flags.Set(name, envValue)
if err != nil {
log.Fatalf("Invalid value for environment variable %q when setting default for --%s: %v", key, name, err)
log.Fatalf("Invalid value when setting --%s from environment variable %s=%q: %v", name, envKey, envValue, err)
}
fs.Debugf(nil, "Set default for --%q from %q to %q (%v)", name, key, newValue, flag.Value)
flag.DefValue = newValue
fs.Debugf(nil, "Setting --%s %q from environment variable %s=%q", name, flag.Value, envKey, envValue)
flag.DefValue = envValue
}
}
// StringP defines a flag which can be overridden by an environment variable
// SetDefaultFromEnv constructs a name from the flag passed in and
// sets the default from the environment if possible
//
// Used to create backend flags like --skip-links
func SetDefaultFromEnv(flags *pflag.FlagSet, name string) {
envKey := fs.OptionToEnv(name)
envValue, found := os.LookupEnv(envKey)
if found {
flag := flags.Lookup(name)
if flag == nil {
log.Fatalf("Couldn't find flag --%q", name)
}
fs.Debugf(nil, "Setting default for %s=%q from environment variable %s", name, envValue, envKey)
//err = tempValue.Set()
flag.DefValue = envValue
}
}
// StringP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.StringP
func StringP(name, shorthand string, value string, usage string) (out *string) {
out = pflag.StringP(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// StringVarP defines a flag which can be overridden by an environment variable
// StringVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.StringVarP
func StringVarP(flags *pflag.FlagSet, p *string, name, shorthand string, value string, usage string) {
flags.StringVarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// BoolP defines a flag which can be overridden by an environment variable
// BoolP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.BoolP
func BoolP(name, shorthand string, value bool, usage string) (out *bool) {
out = pflag.BoolP(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// BoolVarP defines a flag which can be overridden by an environment variable
// BoolVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.BoolVarP
func BoolVarP(flags *pflag.FlagSet, p *bool, name, shorthand string, value bool, usage string) {
flags.BoolVarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// IntP defines a flag which can be overridden by an environment variable
// IntP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.IntP
func IntP(name, shorthand string, value int, usage string) (out *int) {
out = pflag.IntP(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// Int64P defines a flag which can be overridden by an environment variable
// Int64P defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.IntP
func Int64P(name, shorthand string, value int64, usage string) (out *int64) {
out = pflag.Int64P(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// Int64VarP defines a flag which can be overridden by an environment variable
// Int64VarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.Int64VarP
func Int64VarP(flags *pflag.FlagSet, p *int64, name, shorthand string, value int64, usage string) {
flags.Int64VarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// IntVarP defines a flag which can be overridden by an environment variable
// IntVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.IntVarP
func IntVarP(flags *pflag.FlagSet, p *int, name, shorthand string, value int, usage string) {
flags.IntVarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// Uint32VarP defines a flag which can be overridden by an environment variable
// Uint32VarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.Uint32VarP
func Uint32VarP(flags *pflag.FlagSet, p *uint32, name, shorthand string, value uint32, usage string) {
flags.Uint32VarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// Float64P defines a flag which can be overridden by an environment variable
// Float64P defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.Float64P
func Float64P(name, shorthand string, value float64, usage string) (out *float64) {
out = pflag.Float64P(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// Float64VarP defines a flag which can be overridden by an environment variable
// Float64VarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.Float64VarP
func Float64VarP(flags *pflag.FlagSet, p *float64, name, shorthand string, value float64, usage string) {
flags.Float64VarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// DurationP defines a flag which can be overridden by an environment variable
// DurationP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.DurationP
func DurationP(name, shorthand string, value time.Duration, usage string) (out *time.Duration) {
out = pflag.DurationP(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// DurationVarP defines a flag which can be overridden by an environment variable
// DurationVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.DurationVarP
func DurationVarP(flags *pflag.FlagSet, p *time.Duration, name, shorthand string, value time.Duration, usage string) {
flags.DurationVarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// VarP defines a flag which can be overridden by an environment variable
// VarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.VarP
func VarP(value pflag.Value, name, shorthand, usage string) {
pflag.VarP(value, name, shorthand, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
}
// FVarP defines a flag which can be overridden by an environment variable
// FVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.VarP
func FVarP(flags *pflag.FlagSet, value pflag.Value, name, shorthand, usage string) {
flags.VarP(value, name, shorthand, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// VarPF defines a flag which can be overridden by an environment variable
//
// It is a thin wrapper around pflag.VarPF
func VarPF(flags *pflag.FlagSet, value pflag.Value, name, shorthand, usage string) *pflag.Flag {
flag := flags.VarPF(value, name, shorthand, usage)
setDefaultFromEnv(flags, name)
return flag
}
// StringArrayP defines a flag which can be overridden by an environment variable
// StringArrayP defines a flag which can be set by an environment variable
//
// It sets one value only - command line flags can be used to set more.
//
// It is a thin wrapper around pflag.StringArrayP
func StringArrayP(name, shorthand string, value []string, usage string) (out *[]string) {
out = pflag.StringArrayP(name, shorthand, value, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// StringArrayVarP defines a flag which can be overridden by an environment variable
// StringArrayVarP defines a flag which can be set by an environment variable
//
// It sets one value only - command line flags can be used to set more.
//
// It is a thin wrapper around pflag.StringArrayVarP
func StringArrayVarP(flags *pflag.FlagSet, p *[]string, name, shorthand string, value []string, usage string) {
flags.StringArrayVarP(p, name, shorthand, value, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}
// CountP defines a flag which can be overridden by an environment variable
// CountP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.CountP
func CountP(name, shorthand string, usage string) (out *int) {
out = pflag.CountP(name, shorthand, usage)
setDefaultFromEnv(pflag.CommandLine, name)
setValueFromEnv(pflag.CommandLine, name)
return out
}
// CountVarP defines a flag which can be overridden by an environment variable
// CountVarP defines a flag which can be set by an environment variable
//
// It is a thin wrapper around pflag.CountVarP
func CountVarP(flags *pflag.FlagSet, p *int, name, shorthand string, usage string) {
flags.CountVarP(p, name, shorthand, usage)
setDefaultFromEnv(flags, name)
setValueFromEnv(flags, name)
}

24
fs/configmap.go
View File

@ -14,7 +14,12 @@ type configEnvVars string
// Get a config item from the environment variables if possible
func (configName configEnvVars) Get(key string) (value string, ok bool) {
return os.LookupEnv(ConfigToEnv(string(configName), key))
envKey := ConfigToEnv(string(configName), key)
value, ok = os.LookupEnv(envKey)
if ok {
Debugf(nil, "Setting %s=%q for %q from environment variable %s", key, value, configName, envKey)
}
return value, ok
}
// A configmap.Getter to read from the environment RCLONE_option_name
@ -28,14 +33,19 @@ func (oev optionEnvVars) Get(key string) (value string, ok bool) {
if opt == nil {
return "", false
}
// For options with NoPrefix set, check without prefix too
if opt.NoPrefix {
value, ok = os.LookupEnv(OptionToEnv(key))
envKey := OptionToEnv(oev.fsInfo.Prefix + "-" + key)
value, ok = os.LookupEnv(envKey)
if ok {
Debugf(nil, "Setting %s_%s=%q from environment variable %s", oev.fsInfo.Prefix, key, value, envKey)
} else if opt.NoPrefix {
// For options with NoPrefix set, check without prefix too
envKey := OptionToEnv(key)
value, ok = os.LookupEnv(envKey)
if ok {
Debugf(nil, "Setting %s=%q for %s from environment variable %s", key, value, oev.fsInfo.Prefix, envKey)
}
}
return value, ok
}
}
return os.LookupEnv(OptionToEnv(oev.fsInfo.Prefix + "-" + key))
}
// A configmap.Getter to read either the default value or the set

4
fs/rc/registry.go
View File

@ -7,8 +7,6 @@ import (
"sort"
"strings"
"sync"
"github.com/rclone/rclone/fs"
)
// Func defines a type for a remote control function
@ -45,7 +43,7 @@ func (r *Registry) Add(call Call) {
defer r.mu.Unlock()
call.Path = strings.Trim(call.Path, "/")
call.Help = strings.TrimSpace(call.Help)
fs.Debugf(nil, "Adding path %q to remote control registry", call.Path)
// fs.Debugf(nil, "Adding path %q to remote control registry", call.Path) // disabled to make initialization less verbose
r.call[call.Path] = &call
}