parent
c99b37c5b3
commit
a10a604018
@ -0,0 +1,74 @@ |
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package cfg |
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import ( |
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"context" |
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"fmt" |
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"os" |
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"github.com/mediocregopher/mediocre-go-lib/v2/mctx" |
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) |
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// DataDir manages the blog's data directory.
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type DataDir struct { |
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Path string |
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deleteOnClose bool |
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} |
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// Init initializes the data directory, creating the directory named at path if
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// it doesn't exist.
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//
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// If Path is not set, then a temporary directory will be created and its path
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// set to the Path field. This directory will be removed when Close is called.
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func (d *DataDir) Init() error { |
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if d.Path == "" { |
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d.deleteOnClose = true |
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var err error |
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if d.Path, err = os.MkdirTemp("", "mediocre-blog-data-*"); err != nil { |
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return fmt.Errorf("creating temporary directory: %w", err) |
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} |
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return nil |
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} |
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if err := os.MkdirAll(d.Path, 0700); err != nil { |
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return fmt.Errorf( |
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"creating directory (and parents) of %q: %w", |
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d.Path, |
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err, |
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) |
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} |
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return nil |
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} |
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// SetupCfg implement the cfg.Cfger interface.
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func (d *DataDir) SetupCfg(cfg *Cfg) { |
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cfg.StringVar(&d.Path, "data-dir", "", "Directory to use for persistent storage. If unset a temp directory will be created, and will be deleted when the process exits.") |
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cfg.OnInit(func(ctx context.Context) error { |
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return d.Init() |
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}) |
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} |
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// Annotate implements mctx.Annotator interface.
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func (d *DataDir) Annotate(a mctx.Annotations) { |
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a["dataDirPath"] = d.Path |
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} |
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// Close cleans up any temporary state created by DataDir.
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func (d *DataDir) Close() error { |
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if !d.deleteOnClose { |
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return nil |
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} |
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if err := os.RemoveAll(d.Path); err != nil { |
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return fmt.Errorf("removing temp dir %q: %w", d.Path, err) |
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} |
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return nil |
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} |
@ -0,0 +1,9 @@ |
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package cfg |
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// this file contains functionality specific to the mediocre blog.
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// NewBlogCfg returns a Cfg specifically configured for mediocre blog processes.
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func NewBlogCfg(params Params) *Cfg { |
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params.EnvPrefix = "MEDIOCRE_BLOG" |
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return New(params) |
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} |
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