forked from wrenn/wrenn
pptx704
948db13bed
- skip_pre_post flag on builds bypasses apt update/clean pre/post steps for
faster iteration when the recipe handles its own environment setup
- POST /v1/admin/builds/{id}/cancel endpoint marks an in-progress build as
cancelled; UpdateBuildStatus now also sets completed_at for 'cancelled'
- internal/recipe: typed recipe parser and executor (RUN/ENV/COPY steps)
replacing the raw string slice approach in the build worker
- pre/post build commands prefixed with RUN to match recipe step format
64 lines
2.0 KiB
Go
64 lines
2.0 KiB
Go
package recipe
|
|
|
|
import "strings"
|
|
|
|
// ExecContext holds mutable state that persists across recipe steps.
|
|
// It is initialized empty and updated by ENV and WORKDIR steps.
|
|
type ExecContext struct {
|
|
WorkDir string
|
|
EnvVars map[string]string
|
|
}
|
|
|
|
// WrappedCommand returns the full shell command for a RUN step with context
|
|
// applied. The result is passed as the argument to /bin/sh -c.
|
|
//
|
|
// If WORKDIR and/or ENV are set, they are prepended as a shell preamble:
|
|
//
|
|
// cd '/the/dir' && KEY='val' /bin/sh -c 'original command'
|
|
func (c *ExecContext) WrappedCommand(cmd string) string {
|
|
prefix := c.shellPrefix()
|
|
if prefix == "" {
|
|
return cmd
|
|
}
|
|
return prefix + "/bin/sh -c " + shellescape(cmd)
|
|
}
|
|
|
|
// StartCommand returns the shell command for a START step. The process is
|
|
// launched in the background via nohup so that the outer shell exits
|
|
// immediately, allowing the build to continue. stdout/stderr of the
|
|
// background process are discarded (the process keeps running in the VM).
|
|
//
|
|
// Multiple START steps can be issued to run several background processes
|
|
// simultaneously before a healthcheck is evaluated.
|
|
func (c *ExecContext) StartCommand(cmd string) string {
|
|
prefix := c.shellPrefix()
|
|
return prefix + "nohup /bin/sh -c " + shellescape(cmd) + " >/dev/null 2>&1 &"
|
|
}
|
|
|
|
// shellPrefix builds the "cd ... && KEY=val " preamble for a shell command.
|
|
// Returns an empty string when no context is set.
|
|
func (c *ExecContext) shellPrefix() string {
|
|
if c.WorkDir == "" && len(c.EnvVars) == 0 {
|
|
return ""
|
|
}
|
|
var sb strings.Builder
|
|
if c.WorkDir != "" {
|
|
sb.WriteString("cd ")
|
|
sb.WriteString(shellescape(c.WorkDir))
|
|
sb.WriteString(" && ")
|
|
}
|
|
for k, v := range c.EnvVars {
|
|
sb.WriteString(k)
|
|
sb.WriteByte('=')
|
|
sb.WriteString(shellescape(v))
|
|
sb.WriteByte(' ')
|
|
}
|
|
return sb.String()
|
|
}
|
|
|
|
// shellescape wraps s in single quotes, escaping any embedded single quotes.
|
|
// This is POSIX-safe for paths, env values, and shell commands.
|
|
func shellescape(s string) string {
|
|
return "'" + strings.ReplaceAll(s, "'", `'\''`) + "'"
|
|
}
|