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allow setting values not present in the config file

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replicas and arrays in general, are more complicated :/
This commit is contained in:
dakkar 2024-03-24 11:12:17 +00:00
parent 435cab01c8
commit 0e8cdb30b7
1 changed files with 30 additions and 23 deletions
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53
packages/backend/src/config.ts
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@ -311,17 +311,13 @@ function convertRedisOptions(options: RedisOptionsSource, host: string): RedisOp
this function allows overriding any string-valued config option with
a sensible-named environment variable
e.g. `MK_CONFIG_MEILISEARCH_APIKEY` overrides `config.meilisearch.apikey`
the option's containing object must be present in the config *file*,
so in the example above, `config.meilisearch` must be set to
something in the file, it can't be completely commented out.
e.g. `MK_CONFIG_MEILISEARCH_APIKEY` sets `config.meilisearch.apikey`
you can also override a single `dbSlave` value,
e.g. `MK_CONFIG_DBSLAVES_1_PASS` sets the password for the 2nd
database replica (the first one would be
`MK_CONFIG_DBSLAVES_0_PASS`); again, `config.dbSlaves` must be set
to an array of the right size already in the file
`MK_CONFIG_DBSLAVES_0_PASS`); in this case, `config.dbSlaves` must
be set to an array of the right size already in the file
values can be read from files, too: setting `MK_DB_PASS_FILE` to
`/some/file` would set the main database password to the contents of
@ -332,10 +328,10 @@ function applyEnvOverrides(config: Source) {
// the given steps, building the env variable name
function _apply_top(steps: (string | number)[]) {
_apply_inner(config, '', steps);
_walk('', [], steps);
}
function _apply_inner(thisConfig: any, name: string, steps: (string | number)[]) {
function _walk(name: string, path: (string | number)[], steps: (string | number)[]) {
// are there more steps after this one? recurse
if (steps.length > 1) {
const thisStep = steps.shift();
@ -344,10 +340,10 @@ function applyEnvOverrides(config: Source) {
// if a step is not a simple value, iterate through it
if (typeof thisStep === 'object') {
for (const thisOneStep of thisStep) {
_descend(thisConfig, name, thisOneStep, steps);
_descend(name, path, thisOneStep, steps);
}
} else {
_descend(thisConfig, name, thisStep, steps);
_descend(name, path, thisStep, steps);
}
// the actual override has happened at the bottom of the
@ -360,10 +356,10 @@ function applyEnvOverrides(config: Source) {
if (typeof lastStep === 'object') {
for (const lastOneStep of lastStep) {
_lastBit(thisConfig, name, lastOneStep);
_lastBit(name, path, lastOneStep);
}
} else {
_lastBit(thisConfig, name, lastStep);
_lastBit(name, path, lastStep);
}
}
@ -372,29 +368,40 @@ function applyEnvOverrides(config: Source) {
}
// this recurses down, bailing out if there's no config to override
function _descend(thisConfig: any, name: string, thisStep: string | number, steps: (string | number)[]) {
function _descend(name: string, path: (string | number)[], thisStep: string | number, steps: (string | number)[]) {
name = `${name}${_step2name(thisStep)}_`;
thisConfig = thisConfig[thisStep];
if (!thisConfig) return;
_apply_inner(thisConfig, name, steps);
path = [ ...path, thisStep ];
_walk(name, path, steps);
}
// this is the bottom of the recursion: look at the environment and
// set the value
function _lastBit(thisConfig: any, name: string, lastStep: string | number) {
name = `${name}${_step2name(lastStep)}`;
function _lastBit(name: string, path: (string | number)[], lastStep: string | number) {
name = `MK_CONFIG_${name}${_step2name(lastStep)}`;
const val = process.env[`MK_CONFIG_${name}`];
const val = process.env[name];
if (val != null && val != undefined) {
thisConfig[lastStep] = val;
_assign(path, lastStep, val);
}
const file = process.env[`MK_CONFIG_${name}_FILE`];
const file = process.env[`${name}_FILE`];
if (file) {
thisConfig[lastStep] = fs.readFileSync(file, 'utf-8').trim();
_assign(path, lastStep, fs.readFileSync(file, 'utf-8').trim());
}
}
function _assign(path: (string | number)[], lastStep: string | number, value: string) {
let thisConfig = config;
for (const step of path) {
if (!thisConfig[step]) {
thisConfig[step] = {};
}
thisConfig = thisConfig[step];
}
thisConfig[lastStep] = value;
}
// these are all the settings that can be overridden
_apply_top([['url', 'port', 'socket', 'chmodSocket', 'disableHsts']]);